This is a list of the National Register of Historic Places listings in St. Mary Parish, Louisiana.

This is intended to be a complete list of the properties and districts on the National Register of Historic Places in St. Mary Parish, Louisiana, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map.^[1]

There are 29 properties and districts listed on the National Register in the parish.

          This National Park Service list is complete through NPS recent listings posted January 26, 2024.^[2]

Current listings

[3]	Name on the Register[4]	Image	Date listed[5]	Location	City or town	Description
1	Albania Plantation House		January 26, 2001 (#01000007)	1842 Louisiana Highway 182, E. 29°54′12″N 91°38′58″W / 29.903333°N 91.649444°W / 29.903333; -91.649444 (Albania Plantation House)	Jeanerette vicinity
2	Alice C Plantation House		October 24, 2000 (#00001229)	10736 Louisiana Highway 182 29°46′10″N 91°28′38″W / 29.769444°N 91.477222°W / 29.769444; -91.477222 (Alice C Plantation House)	Garden City
3	Arlington Plantation House		October 5, 1982 (#82000457)	56 E. Main St. 29°46′43″N 91°29′35″W / 29.778611°N 91.493056°W / 29.778611; -91.493056 (Arlington Plantation House)	Franklin
4	Atkinson Memorial Presbyterian Church		March 19, 1991 (#91000248)	214 4th St. 29°41′34″N 91°12′04″W / 29.692778°N 91.201111°W / 29.692778; -91.201111 (Atkinson Memorial Presbyterian Church)	Morgan City
5	Birg House	Upload image	June 24, 1982 (#82004837)	Off Louisiana Highway 182 29°49′32″N 91°30′58″W / 29.825556°N 91.516111°W / 29.825556; -91.516111 (Birg House)	Baldwin vicinity
6	Bittersweet		October 28, 1980 (#80004324)	301 Main St. 29°47′18″N 91°29′21″W / 29.788333°N 91.489167°W / 29.788333; -91.489167 (Bittersweet)	Franklin
7	Boy Scout Troop #1 Log Cabin	Upload image	September 7, 2001 (#01000944)	601 Adams 29°47′42″N 91°30′22″W / 29.795°N 91.506111°W / 29.795; -91.506111 (Boy Scout Troop #1 Log Cabin)	Franklin
8	Brubaker House		September 29, 1995 (#95001133)	1102 2nd St. 29°42′07″N 91°12′42″W / 29.701944°N 91.211667°W / 29.701944; -91.211667 (Brubaker House)	Morgan City
9	Calumet Plantation House		October 18, 1984 (#84002859)	West of Patterson on Louisiana Highway 182 29°42′42″N 91°20′40″W / 29.711667°N 91.344444°W / 29.711667; -91.344444 (Calumet Plantation House)	Patterson vicinity
10	Joshua B. Cary House		August 11, 1982 (#82004677)	U.S. Route 90 and Louisiana Highway 317 29°45′32″N 91°25′41″W / 29.758889°N 91.428056°W / 29.758889; -91.428056 (Joshua B. Cary House)	Centerville
11	Darby House		August 11, 1982 (#82004678)	102 Main St. 29°50′14″N 91°32′38″W / 29.837222°N 91.543889°W / 29.837222; -91.543889 (Darby House)	Baldwin
12	Dixie Plantation House	Upload image	May 29, 1987 (#87000851)	11076 Louisiana Highway 182 29°46′30″N 91°29′19″W / 29.775°N 91.488611°W / 29.775; -91.488611 (Dixie Plantation House)	Franklin
13	Franklin Foundation Hospital	Upload image	October 10, 2017 (#100001713)	1501 Hospital Ave. 29°48′14″N 91°29′56″W / 29.803965°N 91.498848°W / 29.803965; -91.498848 (Franklin Foundation Hospital)	Franklin
14	Franklin Historic District		December 29, 1982 (#82000458)	U.S. Route 90; also 600-608 Palfrey St. 29°47′32″N 91°30′10″W / 29.792222°N 91.502778°W / 29.792222; -91.502778 (Franklin Historic District)	Franklin	Palfrey St. represents a boundary increase of September 15, 2005
15	Grevemberg House	More images	June 6, 1980 (#80004325)	Sterling Rd. 29°48′09″N 91°29′48″W / 29.8025°N 91.496667°W / 29.8025; -91.496667 (Grevemberg House)	Franklin
16	Hanson Lumber Company Office		October 7, 1993 (#93001034)	10400 Louisiana Highway 182 29°45′56″N 91°27′59″W / 29.765556°N 91.466389°W / 29.765556; -91.466389 (Hanson Lumber Company Office)	Garden City
17	Hanson Lumber Company Owner's House		October 7, 1993 (#93001035)	10407 Louisiana Highway 182 29°45′54″N 91°28′00″W / 29.765°N 91.466667°W / 29.765; -91.466667 (Hanson Lumber Company Owner's House)	Garden City
18	Heaton House		October 30, 1980 (#80004328)	North of Baldwin on Charenton Rd. 29°52′13″N 91°31′26″W / 29.870278°N 91.523889°W / 29.870278; -91.523889 (Heaton House)	Baldwin vicinity
19	Idlewild		November 2, 1982 (#82000459)	South of Patterson on Louisiana Highway 182 29°40′45″N 91°17′34″W / 29.679167°N 91.292778°W / 29.679167; -91.292778 (Idlewild)	Patterson
20	Hilaire Lancon House	Upload image	November 9, 2001 (#01001210)	3934 Irish Bend Rd. 29°50′45″N 91°29′16″W / 29.845833°N 91.487778°W / 29.845833; -91.487778 (Hilaire Lancon House)	Franklin vicinity
21	Morgan City City Hall and Courthouse		April 9, 1981 (#81000676)	Corner of Everett and 1st Sts. 29°41′41″N 91°12′31″W / 29.694696°N 91.208586°W / 29.694696; -91.208586 (Morgan City City Hall and Courthouse)	Morgan City
22	Morgan City Historic District	Upload image	January 9, 1986 (#86000060)	Roughly bounded by Greenwood St., Arkansas St., Railroad Ave., and Front St. 29°41′43″N 91°12′31″W / 29.695278°N 91.208611°W / 29.695278; -91.208611 (Morgan City Historic District)	Morgan City
23	Oaklawn Manor		March 30, 1973 (#73002162)	5 miles northeast of Franklin on Irish Bend Rd. 29°50′58″N 91°28′03″W / 29.849444°N 91.4675°W / 29.849444; -91.4675 (Oaklawn Manor)	Franklin vicinity	Plantation home of U.S. Senator Alexander Porter (1785–1844).
24	Patterson Commercial Historic District	More images	May 31, 2016 (#16000303)	1106, 1110, 1107, 1109 Main St. 29°41′38″N 91°18′09″W / 29.693992°N 91.302500°W / 29.693992; -91.302500 (Patterson Commercial Historic District)	Patterson
25	St. Mary's Episcopal Church		November 21, 1980 (#80004327)	805 1st St. 29°47′37″N 91°30′08″W / 29.79373°N 91.50233°W / 29.79373; -91.50233 (St. Mary's Episcopal Church)	Franklin
26	Smith House		June 6, 1980 (#80004326)	909 2nd St. 29°47′42″N 91°30′13″W / 29.795°N 91.503611°W / 29.795; -91.503611 (Smith House)	Franklin
27	Southwest Reef Lighthouse	More images	September 12, 1991 (#91001152)	Junction of Bellevue Front and Canton Sts. 29°41′37″N 91°12′59″W / 29.693611°N 91.216389°W / 29.693611; -91.216389 (Southwest Reef Lighthouse)	Berwick
28	Tillandsia	More images	August 11, 1982 (#82004679)	202 Charenton Rd. 29°50′27″N 91°32′32″W / 29.840833°N 91.542222°W / 29.840833; -91.542222 (Tillandsia)	Baldwin
29	US Post Office		December 17, 1982 (#82000460)	1st and Everett Sts. 29°41′39″N 91°12′33″W / 29.694167°N 91.209167°W / 29.694167; -91.209167 (US Post Office)	Morgan City