This is a list of the National Register of Historic Places listings in Custer County, Montana. It is intended to be a complete list of the properties and districts on the National Register of Historic Places in Custer County, Montana, 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 18 properties and districts listed on the National Register in the county.

          This National Park Service list is complete through NPS recent listings posted February 23, 2024.^[2]

Current listings

[3]	Name on the Register	Image	Date listed[4]	Location	City or town	Description
1	Carriage House Historic District		June 7, 1991 (#91000720)	Roughly bounded by Main, N. 9th, Palmer, N. 10th, Orr, and N. 13th Sts. and Montana Ave. 46°24′35″N 105°50′41″W / 46.409722°N 105.844722°W / 46.409722; -105.844722 (Carriage House Historic District)	Miles City
2	East Main Street Residential Historic District		January 10, 1990 (#89002171)	1600-2315 E. Main St. 46°24′31″N 105°50′07″W / 46.408611°N 105.835278°W / 46.408611; -105.835278 (East Main Street Residential Historic District)	Miles City
3	Fort Keogh	More images	March 8, 1978 (#78001680)	2.5 miles (4 km) southwest of Miles City 46°22′50″N 105°53′09″W / 46.380556°N 105.885833°W / 46.380556; -105.885833 (Fort Keogh)	Miles City
4	William Harmon House		September 25, 1986 (#86002747)	1005 Palmer 46°24′36″N 105°50′48″W / 46.41°N 105.846667°W / 46.41; -105.846667 (William Harmon House)	Miles City
5	Holy Rosary Hospital	More images	January 15, 2009 (#08001324)	310 N. Jordan and 2007 Clark St. 46°24′40″N 105°50′08″W / 46.411028°N 105.835539°W / 46.411028; -105.835539 (Holy Rosary Hospital)	Miles City
6	Ismay Jail		June 4, 1997 (#97000501)	Jailhouse Rd. west of its junction with East St. 46°29′53″N 104°47′34″W / 46.498056°N 104.792778°W / 46.498056; -104.792778 (Ismay Jail)	Ismay
7	Locate Creek Bridge	Upload image	March 26, 2012 (#12000170)	Mile 3 N. Locate Rd. 46°28′30″N 105°18′17″W / 46.474887°N 105.304602°W / 46.474887; -105.304602 (Locate Creek Bridge)	Miles City vicinity	part of the Montana's Steel Stringer and Steel Girder Bridges MPS
8	Main Street Historic District	More images	July 21, 1989 (#89000808)	Roughly Main St. from Prairie Ave. to 4th St. 46°24′21″N 105°50′52″W / 46.405833°N 105.847778°W / 46.405833; -105.847778 (Main Street Historic District)	Miles City
9	Miles City Steam Laundry		July 5, 1979 (#79001400)	800 Bridge St. 46°24′23″N 105°50′48″W / 46.406389°N 105.846667°W / 46.406389; -105.846667 (Miles City Steam Laundry)	Miles City
10	Miles City Waterworks Building and Pumping Plant Park		September 26, 1979 (#79003723)	West of Miles City on Pumping Plant Rd. 46°24′22″N 105°52′05″W / 46.406111°N 105.868056°W / 46.406111; -105.868056 (Miles City Waterworks Building and Pumping Plant Park)	Miles City
11	George M. Miles House		February 17, 1982 (#82003161)	28 S. Lake St. 46°24′27″N 105°50′12″W / 46.4075°N 105.836667°W / 46.4075; -105.836667 (George M. Miles House)	Miles City
12	Mountain States Telephone and Telegraph Company		July 21, 1988 (#88001118)	908 Main St. 46°24′26″N 105°50′44″W / 46.407222°N 105.845556°W / 46.407222; -105.845556 (Mountain States Telephone and Telegraph Company)	Miles City
13	Northern Pacific Railway Depot	More images	April 1, 2010 (#10000132)	500 Pacific Ave. 46°24′13″N 105°51′10″W / 46.403483°N 105.852772°W / 46.403483; -105.852772 (Northern Pacific Railway Depot)	Miles City
14	Olive Hotel	More images	October 13, 1988 (#88001117)	501 Main St. 46°24′21″N 105°51′03″W / 46.405833°N 105.850833°W / 46.405833; -105.850833 (Olive Hotel)	Miles City
15	Thomas and Beulah Shore House		December 18, 2003 (#03001299)	602 S. Strevell Ave. 46°24′12″N 105°49′57″W / 46.403333°N 105.8325°W / 46.403333; -105.8325 (Thomas and Beulah Shore House)	Miles City
16	Walrond and Elizabeth Snell House		September 11, 2003 (#03000923)	402 S. Lake St. 46°24′16″N 105°50′15″W / 46.404444°N 105.8375°W / 46.404444; -105.8375 (Walrond and Elizabeth Snell House)	Miles City
17	Ursuline Convent of the Sacred Heart		March 5, 1992 (#92000115)	1411 Leighton Boulevard 46°24′44″N 105°50′32″W / 46.412222°N 105.842222°W / 46.412222; -105.842222 (Ursuline Convent of the Sacred Heart)	Miles City
18	US Post Office-Miles City Main		March 14, 1986 (#86000686)	106 N. 7th St. 46°24′28″N 105°50′58″W / 46.407778°N 105.849444°W / 46.407778; -105.849444 (US Post Office-Miles City Main)	Miles City