This is a list of the National Register of Historic Places listings in Middlesex County, Connecticut.

There are 123 properties and districts listed on the National Register of Historic Places in Middlesex County, Connecticut, United States. Tabulated here are 89 places; see National Register of Historic Places listings in Middletown, Connecticut for 34 more; the oyster sloop Christeen was located in Middlesex County when listed in 1991, but relocated to Oyster Bay, New York in 1992. Including those in Middletown, there are three National Historic Landmarks among the listings.

The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in an online map.^[1]

          This National Park Service list is complete through NPS recent listings posted March 22, 2024.^[2]

Current listings (excluding Middletown)

[3]	Name on the Register[4]	Image	Date listed[5]	Location	City or town	Description
1	Belltown Historic District	More images	October 28, 1985 (#85003543)	Roughly Main St. between W. High St. and CT 16, and portions of cross streets W. High, Barton Hill-Summit, and Skinner St. 41°34′23″N 72°30′17″W / 41.573056°N 72.504722°W / 41.573056; -72.504722 (Belltown Historic District)	East Hampton
2	Black Horse Tavern		December 1, 1978 (#78002851)	Southeast of Old Saybrook at 175 N. Cove Rd. 41°17′20″N 72°21′20″W / 41.288889°N 72.355556°W / 41.288889; -72.355556 (Black Horse Tavern)	Old Saybrook
3	BOC Site	Upload image	October 15, 1987 (#87001218)	Address Restricted	Haddam	Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. 0.1 acre.
4	Bridge No. 1132		September 29, 2004 (#04001091)	CT 80 at the Hammonasset River 41°21′26″N 72°36′45″W / 41.357222°N 72.612553°W / 41.357222; -72.612553 (Bridge No. 1132)	Killingworth	Open-spandrel concrete arch bridge built in 1934; extends into Madison in New Haven County
5	Bridge No. 1603		July 29, 1993 (#93000641)	Devil's Hopyard Rd. (Rt. 434) over an unnamed brook in Devil's Hopyard State Park 41°29′02″N 72°20′33″W / 41.483756°N 72.342370°W / 41.483756; -72.342370 (Bridge No. 1603)	East Haddam	Near Chapman Falls.
6	Bridge No. 1604		July 29, 1993 (#93000642)	Devil's Hopyard Rd. (Rt. 434) over unnamed brook in Devil's Hopyard State Park 41°28′39″N 72°20′31″W / 41.477417°N 72.341954°W / 41.477417; -72.341954 (Bridge No. 1604)	East Haddam
7	Bridge No. 1605		July 29, 1993 (#93000643)	Devil's Hopyard Rd. (Rt. 434) over Muddy Brook in Devil's Hopyard State Park 41°28′32″N 72°20′31″W / 41.475528°N 72.341911°W / 41.475528; -72.341911 (Bridge No. 1605)	East Haddam
8	Benjamin Bushnell Farm		May 10, 1990 (#90000761)	52 Ingham Hill Rd. 41°19′49″N 72°25′14″W / 41.330278°N 72.420556°W / 41.330278; -72.420556 (Benjamin Bushnell Farm)	Essex
9	Elisha Bushnell House		November 29, 1978 (#78002850)	1445 Boston Post Rd. 41°17′14″N 72°24′31″W / 41.287222°N 72.408611°W / 41.287222; -72.408611 (Elisha Bushnell House)	Old Saybrook
10	Bushnell-Dickinson House		August 28, 2013 (#13000289)	170 Old Post Rd. 41°17′12″N 72°24′11″W / 41.286528°N 72.403087°W / 41.286528; -72.403087 (Bushnell-Dickinson House)	Old Saybrook
11	Camp Bethel	More images	December 11, 2007 (#07001246)	124 Camp Bethel Rd. 41°27′11″N 72°28′24″W / 41.45309°N 72.473215°W / 41.45309; -72.473215 (Camp Bethel)	Haddam
12	Hubbell Carter House		November 29, 2018 (#100003147)	2 Carter Hill Rd. 41°18′52″N 72°30′59″W / 41.3144°N 72.516308°W / 41.3144; -72.516308 (Hubbell Carter House)	Clinton
13	Centerbrook Congregational Church		February 12, 1987 (#87000113)	Main St. 41°21′06″N 72°24′53″W / 41.351667°N 72.414722°W / 41.351667; -72.414722 (Centerbrook Congregational Church)	Essex
14	Clinton Village Historic District		July 29, 1994 (#94000788)	Along Cemetery Rd., Church, E. Main and Liberty Sts., Old Post Rd., and Waterside Ln. 41°16′36″N 72°31′07″W / 41.276667°N 72.518611°W / 41.276667; -72.518611 (Clinton Village Historic District)	Clinton
15	Comstock's Bridge	More images	January 1, 1976 (#76001978)	Southeast of East Hampton off CT 16 41°33′11″N 72°26′57″W / 41.553056°N 72.449167°W / 41.553056; -72.449167 (Comstock's Bridge)	East Hampton
16	Comstock-Cheney Hall		April 15, 1982 (#82003769)	Main and Summit Sts. 41°20′55″N 72°26′32″W / 41.348642°N 72.442236°W / 41.348642; -72.442236 (Comstock-Cheney Hall)	Essex	Better known as Ivoryton Theatre, the first summer theatre in the U.S.?
17	Connecticut Valley Railroad Roundhouse and Turntable Site	More images	April 28, 1994 (#94000395)	Off Main St. in Fort Saybrook Monument Park in Saybrook Point 41°17′02″N 72°21′05″W / 41.283889°N 72.351389°W / 41.283889; -72.351389 (Connecticut Valley Railroad Roundhouse and Turntable Site)	Old Saybrook
18	Cypress Cemetery		October 2, 2018 (#100003006)	100 College St. 41°17′02″N 72°21′19″W / 41.2838°N 72.3553°W / 41.2838; -72.3553 (Cypress Cemetery)	Old Saybrook
19	Charles Daniels House		February 19, 1988 (#88000094)	43 Liberty St. 41°24′27″N 72°27′33″W / 41.4075°N 72.459167°W / 41.4075; -72.459167 (Charles Daniels House)	Chester
20	Amasa Day House	More images	September 22, 1972 (#72001315)	Plains Rd. 41°30′07″N 72°27′09″W / 41.501944°N 72.4525°W / 41.501944; -72.4525 (Amasa Day House)	East Haddam
21	Deep River Freight Station	More images	December 21, 1994 (#94001445)	152 River St. 41°23′38″N 72°25′37″W / 41.3939°N 72.4269°W / 41.3939; -72.4269 (Deep River Freight Station)	Deep River
22	Deep River Town Hall		January 1, 1976 (#76001977)	CT 80 and CT 9A 41°23′06″N 72°26′11″W / 41.385°N 72.4364°W / 41.385; -72.4364 (Deep River Town Hall)	Deep River
23	Doane's Sawmill/Deep River Manufacturing Company	More images	February 21, 1985 (#85000313)	Horse Hill and Winthrop Rds. 41°20′17″N 72°29′02″W / 41.3381°N 72.4839°W / 41.3381; -72.4839 (Doane's Sawmill/Deep River Manufacturing Company)	Westbrook and Deep River
24	Doris (Sailing yacht)		May 31, 1984 (#84001108)	Connecticut River off River Rd. 41°23′00″N 72°23′34″W / 41.3833°N 72.3928°W / 41.3833; -72.3928 (Doris (Sailing yacht))	Deep River
25	Jedidiah Dudley House		April 12, 1982 (#82004339)	Springbrook Rd. 41°18′54″N 72°21′51″W / 41.315°N 72.3642°W / 41.315; -72.3642 (Jedidiah Dudley House)	Old Saybrook
26	East Haddam Historic District		April 29, 1983 (#83001273)	CT 149, Broom, Norwich, Creamery, Lumberyard, and Landing Hill Rds. 41°27′23″N 72°27′45″W / 41.4564°N 72.4625°W / 41.4564; -72.4625 (East Haddam Historic District)	East Haddam
27	Samuel Eliot House		November 9, 1972 (#72001316)	500 Main St. 41°17′02″N 72°22′08″W / 41.2839°N 72.3689°W / 41.2839; -72.3689 (Samuel Eliot House)	Old Saybrook
28	Emmanuel Church	More images	August 5, 1999 (#99000924)	50 Emmanuel Church Rd. 41°23′34″N 72°36′33″W / 41.3928°N 72.6092°W / 41.3928; -72.6092 (Emmanuel Church)	Killingworth
29	Essex Freight Station	More images	April 19, 1994 (#94000337)	1 Railroad Ave. 41°21′00″N 72°24′18″W / 41.3501°N 72.4049°W / 41.3501; -72.4049 (Essex Freight Station)	Essex
30	Fenwick Historic District	More images	April 13, 1995 (#95000437)	Roughly, along Agawam, Neponset and Pettipaug Aves. 41°16′14″N 72°21′23″W / 41.2706°N 72.35634°W / 41.2706; -72.35634 (Fenwick Historic District)	Old Saybrook
31	Goodspeed Opera House		July 30, 1971 (#71000901)	Norwich Rd. 41°27′07″N 72°27′47″W / 41.4519°N 72.4631°W / 41.4519; -72.4631 (Goodspeed Opera House)	East Haddam
32	Haddam Center Historic District	More images	February 9, 1989 (#89000012)	Roughly 2.5 miles (4.0 km) along Walkley Rd. and CT 154/Saybrook Rd. 41°28′46″N 72°30′55″W / 41.4794°N 72.5153°W / 41.4794; -72.5153 (Haddam Center Historic District)	Haddam
33	Hadlyme North Historic District	More images	December 8, 1988 (#88002686)	Roughly bounded by CT 82, Town St., Banning Rd., and Old Town St. 41°25′45″N 72°24′25″W / 41.4292°N 72.4069°W / 41.4292; -72.4069 (Hadlyme North Historic District)	East Haddam
34	Hammonasset Paper Mill Site	More images	February 23, 1996 (#96000128)	Green Hill Road at the Hammonasset River[6] 41°19′27″N 72°35′36″W / 41.3241°N 72.5932°W / 41.3241; -72.5932 (Hammonasset Paper Mill Site)	Killingworth	Extends into Madison.
35	Gen. William Hart House		November 9, 1972 (#72001318)	350 Main St. 41°17′14″N 72°22′31″W / 41.2871°N 72.3752°W / 41.2871; -72.3752 (Gen. William Hart House)	Old Saybrook
36	James Hazelton House		November 16, 1988 (#88001468)	23 Hayden Hill Rd. 41°28′46″N 72°31′06″W / 41.4794°N 72.5183°W / 41.4794; -72.5183 (James Hazelton House)	Haddam
37	Higganum Landing Historic District	More images	December 10, 2018 (#100003206)	40-68 Landing Rd., 2-14 Landing Rd. S 41°27′00″N 72°32′55″W / 41.4500°N 72.5485°W / 41.4500; -72.5485 (Higganum Landing Historic District)	Haddam
38	High Street Historic District	Upload image	August 10, 2020 (#100005404)	7 Central Ave., 19-114 High St., and 1-62 John St. 41°16′52″N 72°31′37″W / 41.2810°N 72.5269°W / 41.2810; -72.5269 (High Street Historic District)	Clinton
39	Hill's Academy	More images	August 23, 1985 (#85001831)	22 Prospect St. 41°21′14″N 72°23′34″W / 41.3539°N 72.3928°W / 41.3539; -72.3928 (Hill's Academy)	Essex
40	Indian Hill Avenue Historic District	More images	May 26, 1983 (#83001274)	Main St. and Indian Hill Ave. to the river 41°35′54″N 72°37′23″W / 41.5983°N 72.6231°W / 41.5983; -72.6231 (Indian Hill Avenue Historic District)	Portland
41	Ivoryton Historic District	More images	April 15, 2014 (#13000895)	Roughly bounded by Main, N. Main, Oak, Blake & Summit Sts., Park Rd. & Comstock Ave. 41°20′54″N 72°26′27″W / 41.348311°N 72.440813°W / 41.348311; -72.440813 (Ivoryton Historic District)	Essex	Ivoryton, Connecticut
42	James Pharmacy		August 5, 1994 (#94000845)	2 Pennywise Ln. 41°17′09″N 72°22′35″W / 41.285833°N 72.376389°W / 41.285833; -72.376389 (James Pharmacy)	Old Saybrook	Home and workplace of Anna Louise James (1886–1977), the first African-American woman pharmacist in the state.
43	Lay-Pritchett House		October 11, 1978 (#78002854)	North of Westbrook on CT 145 41°19′55″N 72°29′35″W / 41.331944°N 72.493056°W / 41.331944; -72.493056 (Lay-Pritchett House)	Westbrook
44	Daniel and Mary Lee House		April 3, 1991 (#91000365)	Pepperidge Rd. E of Jobs Pond Rd. 41°34′47″N 72°34′59″W / 41.579722°N 72.583056°W / 41.579722; -72.583056 (Daniel and Mary Lee House)	Portland
45	Little Haddam Historic District		August 1, 1996 (#96000783)	Roughly bounded by E. Haddam Rd., Orchard Rd., and Town St. 41°28′44″N 72°26′48″W / 41.478889°N 72.446667°W / 41.478889; -72.446667 (Little Haddam Historic District)	East Haddam
46	David Lyman II House		February 6, 1986 (#86000149)	5 Lyman Rd. 41°29′47″N 72°42′43″W / 41.496389°N 72.711944°W / 41.496389; -72.711944 (David Lyman II House)	Middlefield
47	Thomas Lyman House	More images	November 20, 1975 (#75001921)	105 Middlefield Rd. 41°29′18″N 72°41′16″W / 41.4883°N 72.6877°W / 41.4883; -72.6877 (Thomas Lyman House)	Durham
48	Lynde Point Lighthouse	More images	May 29, 1990 (#89001469)	Southeastern terminus of Sequassen Ave. 41°16′16″N 72°20′38″W / 41.271111°N 72.343889°W / 41.271111; -72.343889 (Lynde Point Lighthouse)	Old Saybrook
49	Main Street Historic District		October 24, 1985 (#85003389)	Roughly bounded by Nooks Hill Rd., Prospect Hill Rd., Wall and West Sts. and New Ln., and Stevens Ln. and Main St. 41°36′07″N 72°38′56″W / 41.601944°N 72.648889°W / 41.601944; -72.648889 (Main Street Historic District)	Cromwell
50	Main Street Historic District	More images	September 4, 1986 (#86002837)	Roughly Maple Ave. and Main St. between Talcott Ln. and Higganum Rd. 41°28′26″N 72°40′51″W / 41.473889°N 72.680833°W / 41.473889; -72.680833 (Main Street Historic District)	Durham
51	Marlborough Street Historic District	More images	March 20, 2012 (#12000130)	58, 64, 69, 70, 78, 88, & 92 Marlborough St. 41°34′15″N 72°38′05″W / 41.570814°N 72.634825°W / 41.570814; -72.634825 (Marlborough Street Historic District)	Portland
52	Middle Haddam Historic District	More images	February 3, 1984 (#84001112)	Moodus and Long Hill Rds. 41°33′11″N 72°33′06″W / 41.553056°N 72.551667°W / 41.553056; -72.551667 (Middle Haddam Historic District)	East Hampton
53	Middle Haddam School		October 18, 2019 (#100004545)	12 Schoolhouse Ln. 41°33′09″N 72°32′52″W / 41.5525°N 72.5478°W / 41.5525; -72.5478 (Middle Haddam School)	East Hampton
54	Middletown Upper Houses Historic District	More images	July 27, 1979 (#79002620)	CT 99 41°35′19″N 72°38′28″W / 41.588611°N 72.641111°W / 41.588611; -72.641111 (Middletown Upper Houses Historic District)	Cromwell	Historic district of area that was in Middletown, until it was split to Cromwell in 1851
55	Millington Green Historic District		July 25, 1996 (#96000782)	Roughly bounded by Millington, Tater Hill, Haywardville, and Old Hopyard Rds. 41°29′06″N 72°21′28″W / 41.485°N 72.357778°W / 41.485; -72.357778 (Millington Green Historic District)	East Haddam
56	North Cove Historic District	More images	July 22, 1994 (#94000766)	Roughly N. Cove Rd. from Church St. to the Connecticut River and adjacent properties on Cromwell Pl. 41°17′13″N 72°21′32″W / 41.286944°N 72.358889°W / 41.286944; -72.358889 (North Cove Historic District)	Old Saybrook
57	Oak Lodge		September 4, 1986 (#86001734)	Western side of Schreeder Pond, Chatfield Hollow State Park 41°22′11″N 72°35′27″W / 41.369722°N 72.590833°W / 41.369722; -72.590833 (Oak Lodge)	Killingworth
58	Old Saybrook South Green	More images	September 3, 1976 (#76001984)	Old Boston Post Rd., Pennywise Lane, Main St. 41°17′17″N 72°22′36″W / 41.287933°N 72.376771°W / 41.287933; -72.376771 (Old Saybrook South Green)	Old Saybrook
59	Old Saybrook Town Hall and Theater		June 21, 2007 (#07000558)	300 Main St. 41°17′26″N 72°23′11″W / 41.290556°N 72.386389°W / 41.290556; -72.386389 (Old Saybrook Town Hall and Theater)	Old Saybrook	Now known as the Katharine Hepburn Cultural Arts Center
60	Old Town Hall		February 23, 1972 (#72001310)	On the green between Liberty St. and Goose Hill Rd. 41°24′25″N 72°27′09″W / 41.406944°N 72.4525°W / 41.406944; -72.4525 (Old Town Hall)	Chester
61	Oriole Rockshelter	Upload image	October 15, 1987 (#87001222)	Address Restricted	East Haddam
62	Parker House		November 29, 1978 (#78002853)	680 Middlesex Turnpike 41°19′25″N 72°22′30″W / 41.323611°N 72.375°W / 41.323611; -72.375 (Parker House)	Old Saybrook
63	Parmelee House		May 15, 2007 (#07000417)	4 Beckwith Rd. 41°23′03″N 72°35′13″W / 41.384167°N 72.586944°W / 41.384167; -72.586944 (Parmelee House)	Killingworth
64	Portland Brownstone Quarries		May 16, 2000 (#00000703)	Brownstone Ave. and Silver St. 41°34′30″N 72°38′36″W / 41.575°N 72.643333°W / 41.575; -72.643333 (Portland Brownstone Quarries)	Portland	Quarried since 1690, source of vast quantities of brownstone for New York City, Philadelphia, Boston, other urban areas' buildings.
65	Pratt House	More images	August 23, 1985 (#85001824)	19 West Ave. 41°21′13″N 72°23′40″W / 41.3536°N 72.3945°W / 41.3536; -72.3945 (Pratt House)	Essex
66	Dr. Ambrose Pratt House		November 9, 1972 (#72001311)	Pratt St. 41°24′01″N 72°26′43″W / 41.400278°N 72.445278°W / 41.400278; -72.445278 (Dr. Ambrose Pratt House)	Chester
67	Humphrey Pratt Tavern		November 7, 1972 (#72001320)	287 Main St. 41°17′18″N 72°22′35″W / 41.288333°N 72.376389°W / 41.288333; -72.376389 (Humphrey Pratt Tavern)	Old Saybrook
68	Pratt, Read and Company Factory Complex		August 30, 1984 (#84001117)	Main St. between Bridge and Spring Sts. and 5 Bridge St. 41°23′25″N 72°26′22″W / 41.390278°N 72.439444°W / 41.390278; -72.439444 (Pratt, Read and Company Factory Complex)	Deep River
69	Rapallo Viaduct	More images	August 21, 1986 (#86002728)	Flat Brook and former Air Line railroad right-of-way 41°34′19″N 72°28′19″W / 41.571944°N 72.471944°W / 41.571944; -72.471944 (Rapallo Viaduct)	East Hampton
70	Roaring Brook I Site	Upload image	July 31, 1987 (#87001220)	Address Restricted	East Haddam	Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. Less than 1 acre.
71	Roaring Brook II Site	Upload image	July 31, 1987 (#87001221)	Address Restricted	East Haddam	Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. Less than 1 acre.
72	Sage-Kirby House		April 29, 1982 (#82003767)	93 Shunpike Rd. 41°36′41″N 72°40′36″W / 41.611389°N 72.676667°W / 41.611389; -72.676667 (Sage-Kirby House)	Cromwell
73	Saybrook Breakwater Lighthouse	More images	May 29, 1990 (#89001474)	Southern terminus of Saybrook Jetty at the mouth of the Connecticut River 41°15′47″N 72°20′35″W / 41.263056°N 72.343056°W / 41.263056; -72.343056 (Saybrook Breakwater Lighthouse)	Old Saybrook
74	Seventh Sister	More images	July 31, 1986 (#86002103)	67 River Rd. 41°25′25″N 72°25′53″W / 41.423611°N 72.431389°W / 41.423611; -72.431389 (Seventh Sister)	East Haddam and Lyme	Now Gillette Castle State Park.
75	Shore Line Electric Railway Power House		June 20, 2019 (#100004086)	220 Ferry Road 41°18′51″N 72°21′39″W / 41.3141°N 72.3609°W / 41.3141; -72.3609 (Shore Line Electric Railway Power House)	Old Saybrook
76	Steamboat Dock Site	More images	April 1, 1982 (#82003768)	Main St. 41°21′04″N 72°23′06″W / 41.351111°N 72.385°W / 41.351111; -72.385 (Steamboat Dock Site)	Essex	Now the Connecticut River Museum
77	William Stevens House		May 30, 1985 (#85001163)	131 Cow Hill Rd. 41°18′17″N 72°32′45″W / 41.3047°N 72.5457°W / 41.3047; -72.5457 (William Stevens House)	Clinton
78	William Tully House		March 15, 1982 (#82004340)	135 N. Cove Rd. 41°17′21″N 72°21′26″W / 41.289167°N 72.357222°W / 41.289167; -72.357222 (William Tully House)	Old Saybrook
79	Villa Bella Vista		December 28, 2000 (#00001560)	7 Old Depot Rd. 41°24′12″N 72°26′28″W / 41.403333°N 72.441111°W / 41.403333; -72.441111 (Villa Bella Vista)	Chester
80	William Ward Jr. House		February 19, 1988 (#88000109)	137 Powder Hill Rd. 41°30′14″N 72°43′47″W / 41.5040°N 72.7298°W / 41.5040; -72.7298 (William Ward Jr. House)	Middlefield
81	Warner House		February 19, 1987 (#87000174)	307 Town St. 41°27′12″N 72°26′27″W / 41.453333°N 72.440833°W / 41.453333; -72.440833 (Warner House)	East Haddam
82	Jonathan Warner House		December 19, 1978 (#78002855)	47 Kings Highway 41°25′00″N 72°26′27″W / 41.416667°N 72.440833°W / 41.416667; -72.440833 (Jonathan Warner House)	Chester
83	Westbrook Town Center Historic District	More images	October 16, 2017 (#100001732)	Old Clinton at Hammock Rds., Boston Post Rd. at Bellstone Ave., Trolley Rd., Boston Post Rd. at Goodspeed Dr. 41°17′04″N 72°26′44″W / 41.284394°N 72.445492°W / 41.284394; -72.445492 (Westbrook Town Center Historic District)	Westbrook
84	White-Overton-Callander House		May 21, 2014 (#13000896)	492 Main Street 41°35′15″N 72°37′43″W / 41.5876°N 72.6285°W / 41.5876; -72.6285 (White-Overton-Callander House)	Portland	House museum of the Portland Historical Society
85	Ambrose Whittlesey House		August 23, 1985 (#85001830)	14 Main St. 41°17′51″N 72°22′37″W / 41.2975°N 72.376944°W / 41.2975; -72.376944 (Ambrose Whittlesey House)	Old Saybrook
86	John Whittlesey Jr. House		October 26, 1984 (#84002644)	40 Ferry Rd. 41°18′49″N 72°21′33″W / 41.31366°N 72.35923°W / 41.31366; -72.35923 (John Whittlesey Jr. House)	Old Saybrook
87	Wickham Road Historic District		July 25, 1996 (#96000781)	Roughly the junction of Wickham and Geoffrey Rds. 41°30′16″N 72°22′46″W / 41.504444°N 72.379444°W / 41.504444; -72.379444 (Wickham Road Historic District)	East Haddam
88	Williams and Stancliff Octagon Houses		April 22, 1976 (#76001985)	26 and 28 Marlborough St. 41°34′21″N 72°38′20″W / 41.5725°N 72.638889°W / 41.5725; -72.638889 (Williams and Stancliff Octagon Houses)	Portland
89	Working Girls' Vacation Society Historic District		June 3, 1994 (#94000557)	60, 64, and 66 Mill Rd. 41°26′31″N 72°23′43″W / 41.441944°N 72.395278°W / 41.441944; -72.395278 (Working Girls' Vacation Society Historic District)	East Haddam

Formerly listed, and other status

[3]	Name on the Register[4]	Image	Date listed[5]	Location	City or town	Description
1	Christeen (oyster sloop)	More images	December 4, 1991 (#91002060)	Essex Harbor 41°21′03″N 72°23′04″W / 41.350833°N 72.384444°W / 41.350833; -72.384444 (Christeen (oyster sloop))	Essex	Sloop that was stationed in Essex Harbor when NRHP-listed, later moved to Oyster Bay, New York.