# National Register of Historic Places listings in Boulder County, Colorado

This is a list of the National Register of Historic Places listings in Boulder County, Colorado.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Boulder County, Colorado, 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.
There are 89 properties and districts listed on the National Register in the county, including 2 National Historic Landmarks. Another two properties were once listed but have been removed.
This National Park Service list is complete through NPS recent listings posted February 28, 2025.
Download coordinates as:
* KML
* GPX (all coordinates)
* GPX (primary coordinates)
* GPX (secondary coordinates)

## Current listings

| | Name on the Register | Image | Date listed | Location | City or town | Description |
| 1 | Arnett-Fullen House | Arnett-Fullen House More images | January 29, 2009 (#08001376) | 646 Pearl St. 40°00′58″N 105°17′12″W﻿ / ﻿40.0162°N 105.2867°W﻿ / 40.0162; -105.2867﻿ (Arnett-Fullen House) | Boulder | Commonly referred to as the Gingerbread House. |
| 2 | Hannah Barker House | Hannah Barker House | September 12, 2019 (#100004376) | 800 Arapahoe Ave. 40°00′46″N 105°17′05″W﻿ / ﻿40.0129°N 105.2847°W﻿ / 40.0129; -105.2847﻿ (Hannah Barker House) | Boulder | |
| 3 | Boulder County Courthouse | Boulder County Courthouse More images | December 13, 2024 (#100011355) | 1300/1325 Pearl Street 40°01′06″N 105°16′41″W﻿ / ﻿40.0182°N 105.2781°W﻿ / 40.0182; -105.2781﻿ (Boulder County Courthouse) | Boulder | |
| 4 | Boulder County Poor Farm | Boulder County Poor Farm | September 13, 2001 (#01000969) | 63rd St. near its junction with Jay Rd. 40°02′44″N 105°12′23″W﻿ / ﻿40.0456°N 105.2063°W﻿ / 40.0456; -105.2063﻿ (Boulder County Poor Farm) | Boulder | |
| 5 | Boulder Creek Bridge | Boulder Creek Bridge More images | March 11, 2003 (#03000103) | State Highway 119 at milepost 39.13 40°00′53″N 105°19′16″W﻿ / ﻿40.01476°N 105.32100°W﻿ / 40.01476; -105.32100﻿ (Boulder Creek Bridge) | Boulder | Concrete slab and beam bridge built in 1953, one of first in state having parabolically arched beams rather than flat ones. |
| 6 | Boulder Valley Grange No. 131 | Boulder Valley Grange No. 131 | December 7, 1987 (#87002009) | 3400 N. 95th St. 40°02′13″N 105°07′48″W﻿ / ﻿40.0369°N 105.1300°W﻿ / 40.0369; -105.1300﻿ (Boulder Valley Grange No. 131) | Lafayette | |
| 7 | Buchan Cabin | Upload image | September 3, 2020 (#100005521) | 2386 Cty. Rd. 111 39°58′02″N 105°36′09″W﻿ / ﻿39.9671°N 105.6025°W﻿ / 39.9671; -105.6025﻿ (Buchan Cabin) | Eldora vicinity | |
| 8 | Bunce School | Bunce School | May 22, 1986 (#86001109) | State Highway 7 south of Allenspark 40°10′23″N 105°28′09″W﻿ / ﻿40.17292°N 105.46905°W﻿ / 40.17292; -105.46905﻿ (Bunce School) | Allenspark | Log one-room schoolhouse built in 1888. |
| 9 | T.M. Callahan House | T.M. Callahan House | May 16, 1985 (#85001064) | 312 Terry St. 40°09′52″N 105°06′17″W﻿ / ﻿40.16450°N 105.10481°W﻿ / 40.16450; -105.10481﻿ (T.M. Callahan House) | Longmont | 1892-built Queen Anne-style brick house |
| 10 | Cardinal Mill | Cardinal Mill | December 22, 2011 (#11000945) | Along Coon Track Creek at Cardinal 39°58′08″N 105°33′00″W﻿ / ﻿39.9689°N 105.5500°W﻿ / 39.9689; -105.5500﻿ (Cardinal Mill) | Nederland | |
| 11 | Carnegie Library | Carnegie Library | February 16, 1979 (#79000573) | 1125 Pine St. 40°01′12″N 105°16′52″W﻿ / ﻿40.0200°N 105.2811°W﻿ / 40.0200; -105.2811﻿ (Carnegie Library) | Boulder | |
| 12 | Chautauqua Auditorium | Chautauqua Auditorium | January 21, 1974 (#74000562) | Chautauqua Park 39°59′51″N 105°16′47″W﻿ / ﻿39.9975°N 105.2797°W﻿ / 39.9975; -105.2797﻿ (Chautauqua Auditorium) | Boulder | |
| 13 | Church of the Brethren | Church of the Brethren | January 5, 1984 (#84000794) | 17th Ave. 40°11′19″N 105°10′06″W﻿ / ﻿40.1886°N 105.1683°W﻿ / 40.1886; -105.1683﻿ (Church of the Brethren) | Hygiene | |
| 14 | Colorado Chautauqua | Colorado Chautauqua More images | March 21, 1978 (#78000830) | 900 Baseline Rd., Chautauqua Park 39°59′52″N 105°16′50″W﻿ / ﻿39.9978°N 105.2806°W﻿ / 39.9978; -105.2806﻿ (Colorado Chautauqua) | Boulder | |
| 15 | Columbia Cemetery | Columbia Cemetery More images | August 1, 1997 (#97000792) | Along 9th St., bounded by Pleasant and College Aves. 40°00′30″N 105°16′58″W﻿ / ﻿40.0083°N 105.2828°W﻿ / 40.0083; -105.2828﻿ (Columbia Cemetery) | Boulder | |
| 16 | Congregational Church | Congregational Church More images | May 20, 1983 (#83001298) | 300 E. Simpson St. 39°59′53″N 105°05′15″W﻿ / ﻿39.9981°N 105.0875°W﻿ / 39.9981; -105.0875﻿ (Congregational Church) | Lafayette | |
| 17 | Denver Elevator-Grain Elevator | Denver Elevator-Grain Elevator | February 14, 1986 (#86000212) | Tract 712 near State Highway 42 39°58′36″N 105°07′45″W﻿ / ﻿39.9767°N 105.1292°W﻿ / 39.9767; -105.1292﻿ (Denver Elevator-Grain Elevator) | Louisville | Commonly referred to as Louisville Grain Elevator |
| 18 | Denver, Boulder and Western Railway Historic District | Denver, Boulder and Western Railway Historic District | September 18, 1980 (#80000882) | State Highway 72 40°00′27″N 105°29′58″W﻿ / ﻿40.0075°N 105.4994°W﻿ / 40.0075; -105.4994﻿ (Denver, Boulder and Western Railway Historic District) | Ward | Also known as the Switzerland Trail. |
| 19 | Denver, Northwestern and Pacific Railway Historic District | Denver, Northwestern and Pacific Railway Historic District | September 30, 1980 (#80000881) | Southwest of Eldora 39°54′52″N 105°41′10″W﻿ / ﻿39.9144°N 105.6861°W﻿ / 39.9144; -105.6861﻿ (Denver, Northwestern and Pacific Railway Historic District) | Eldora | Historic railroad route over Rollins Pass; extends into Gilpin and Grand counties. |
| 20 | Dickens Opera House | Dickens Opera House | July 28, 1987 (#87000702) | 300 Main St. 40°09′52″N 105°06′06″W﻿ / ﻿40.1644°N 105.1017°W﻿ / 40.1644; -105.1017﻿ (Dickens Opera House) | Longmont | |
| 21 | Downtown Boulder Historic District | Downtown Boulder Historic District More images | December 3, 1980 (#80000878) | State Highway 119 40°01′07″N 105°16′43″W﻿ / ﻿40.0186°N 105.2786°W﻿ / 40.0186; -105.2786﻿ (Downtown Boulder Historic District) | Boulder | |
| 22 | Downtown Longmont Historic District | Downtown Longmont Historic District More images | August 28, 2017 (#100001501) | Roughly Main, Coffman & Kimbark Sts. between 3rd & 5th Aves. 40°09′57″N 105°06′09″W﻿ / ﻿40.1657°N 105.1025°W﻿ / 40.1657; -105.1025﻿ (Downtown Longmont Historic District) | Longmont | |
| 23 | East Longs Peak Trail | East Longs Peak Trail More images | July 10, 2007 (#07000740) | West of State Highway 7 40°16′20″N 105°36′02″W﻿ / ﻿40.2722°N 105.6006°W﻿ / 40.2722; -105.6006﻿ (East Longs Peak Trail) | Allenspark | Extends into Larimer County. |
| 24 | East Side Historic District | East Side Historic District More images | October 2, 1986 (#86002812) | Roughly bounded by Long's Peak Ave., Collyer St., Fourth Ave., and Emery St. 40°10′00″N 105°05′56″W﻿ / ﻿40.166667°N 105.098889°W﻿ / 40.166667; -105.098889﻿ (East Side Historic District) | Longmont | |
| 25 | Eldora Historic District | Eldora Historic District | October 4, 1989 (#89000978) | Roughly Eaton Pl., 6th, Pearl, and 4th Sts., Huron Ave., 6th St., Eldorado Ave., and 7th St., Klondyke Ave., and 10th St. 39°57′01″N 105°34′17″W﻿ / ﻿39.950278°N 105.571389°W﻿ / 39.950278; -105.571389﻿ (Eldora Historic District) | Eldora | |
| 26 | Empson Cannery | Empson Cannery More images | January 5, 1984 (#84000796) | 15 3rd Ave. 40°09′49″N 105°05′37″W﻿ / ﻿40.163611°N 105.093611°W﻿ / 40.163611; -105.093611﻿ (Empson Cannery) | Longmont | |
| 27 | First Baptist Church of Boulder | First Baptist Church of Boulder | April 14, 2004 (#04000275) | 1237 Pine St. 40°01′13″N 105°16′45″W﻿ / ﻿40.020278°N 105.279167°W﻿ / 40.020278; -105.279167﻿ (First Baptist Church of Boulder) | Boulder | |
| 28 | First Congregational Church of Lyons | First Congregational Church of Lyons | December 12, 1976 (#76000547) | High and 4th Sts. 40°13′33″N 105°16′11″W﻿ / ﻿40.225833°N 105.269722°W﻿ / 40.225833; -105.269722﻿ (First Congregational Church of Lyons) | Lyons | |
| 29 | Fox Mine Office | Fox Mine Office More images | February 23, 1996 (#96000168) | 1226 S. Cherryvale Rd. 39°58′06″N 105°12′51″W﻿ / ﻿39.968333°N 105.214167°W﻿ / 39.968333; -105.214167﻿ (Fox Mine Office) | Boulder | |
| 30 | Fox Stone Barn | Fox Stone Barn More images | February 16, 1996 (#96000070) | S. Cherryvale Rd., 0.5 miles south of U.S. Highway 36 39°58′10″N 105°12′46″W﻿ / ﻿39.969444°N 105.212778°W﻿ / 39.969444; -105.212778﻿ (Fox Stone Barn) | Boulder | |
| 31 | Ginacci House | Ginacci House | February 14, 1986 (#86000213) | 1116 LaFarge St. 39°58′52″N 105°07′57″W﻿ / ﻿39.981111°N 105.132500°W﻿ / 39.981111; -105.132500﻿ (Ginacci House) | Louisville | |
| 32 | Gold Hill Historic District | Gold Hill Historic District More images | August 3, 1989 (#89000979) | Roughly bounded by North St., Pine St., Boulder St., Gold Run St., and College St. 40°03′43″N 105°24′26″W﻿ / ﻿40.061944°N 105.407222°W﻿ / 40.061944; -105.407222﻿ (Gold Hill Historic District) | Gold Hill | |
| 33 | Gold Miner Hotel | Gold Miner Hotel | July 3, 1997 (#97000657) | 601 Klondyke Ave. 39°57′01″N 105°34′10″W﻿ / ﻿39.950278°N 105.569444°W﻿ / 39.950278; -105.569444﻿ (Gold Miner Hotel) | Eldora | |
| 34 | Highland School | Highland School | December 18, 1978 (#78000831) | 885 Arapahoe Ave. 40°00′48″N 105°17′01″W﻿ / ﻿40.013333°N 105.283611°W﻿ / 40.013333; -105.283611﻿ (Highland School) | Boulder | |
| 35 | David Hull Holmes House | David Hull Holmes House | December 3, 2018 (#100003225) | 720 11th St. 40°00′01″N 105°16′43″W﻿ / ﻿40.0004°N 105.2786°W﻿ / 40.0004; -105.2786﻿ (David Hull Holmes House) | Boulder | |
| 36 | Hotel Boulderado | Hotel Boulderado More images | November 3, 1994 (#94001226) | 2115 13th St. 40°01′09″N 105°16′43″W﻿ / ﻿40.019167°N 105.278611°W﻿ / 40.019167; -105.278611﻿ (Hotel Boulderado) | Boulder | |
| 37 | Hoverhome and Hover Farmstead | Hoverhome and Hover Farmstead | January 15, 1999 (#98001555) | 1303-1309 Hover Rd. 40°10′55″N 105°07′53″W﻿ / ﻿40.181944°N 105.131389°W﻿ / 40.181944; -105.131389﻿ (Hoverhome and Hover Farmstead) | Longmont | |
| 38 | Jacoe Store | Jacoe Store | February 14, 1986 (#86000215) | 1001 Main St. 39°58′47″N 105°07′53″W﻿ / ﻿39.979722°N 105.131389°W﻿ / 39.979722; -105.131389﻿ (Jacoe Store) | Louisville | |
| 39 | Jamestown Mercantile Building | Jamestown Mercantile Building | August 3, 1989 (#89000985) | Main St. 40°06′57″N 105°23′18″W﻿ / ﻿40.115833°N 105.388333°W﻿ / 40.115833; -105.388333﻿ (Jamestown Mercantile Building) | Jamestown | |
| 40 | Jamestown Town Hall | Jamestown Town Hall | July 10, 2003 (#03000615) | 118 Main St. 40°06′58″N 105°23′15″W﻿ / ﻿40.116111°N 105.387500°W﻿ / 40.116111; -105.387500﻿ (Jamestown Town Hall) | Jamestown | |
| 41 | Kullgren House | Kullgren House | May 20, 1983 (#83001299) | 209 E. Cleveland St. 39°59′51″N 105°05′17″W﻿ / ﻿39.997500°N 105.088056°W﻿ / 39.997500; -105.088056﻿ (Kullgren House) | Lafayette | |
| 42 | Lackner's Tavern | Lackner's Tavern | February 14, 1986 (#86000220) | 1006 Pine 39°58′31″N 105°07′45″W﻿ / ﻿39.975278°N 105.129167°W﻿ / 39.975278; -105.129167﻿ (Lackner's Tavern) | Louisville | |
| 43 | Lafayette House | Lafayette House | May 20, 1983 (#83001300) | 600 E. Simpson St. 39°59′53″N 105°05′01″W﻿ / ﻿39.998056°N 105.083611°W﻿ / 39.998056; -105.083611﻿ (Lafayette House) | Lafayette | |
| 44 | LaSalla House | LaSalla House | February 14, 1986 (#86000217) | 1124 Main St. 39°58′53″N 105°07′52″W﻿ / ﻿39.981389°N 105.131111°W﻿ / 39.981389; -105.131111﻿ (LaSalla House) | Louisville | |
| 45 | Lewis House | Lewis House | May 20, 1983 (#83001301) | 108 E. Simpson St. 39°59′53″N 105°05′21″W﻿ / ﻿39.998056°N 105.089167°W﻿ / 39.998056; -105.089167﻿ (Lewis House) | Lafayette | |
| 46 | Little Church in the Pines | Little Church in the Pines | August 3, 1989 (#89000983) | 414 Gold Run Rd. 40°03′12″N 105°22′33″W﻿ / ﻿40.053333°N 105.375833°W﻿ / 40.053333; -105.375833﻿ (Little Church in the Pines) | Salina | |
| 47 | Longhurst Lodge | Upload image | September 18, 2017 (#100001606) | State Highway 7 and County Road 82, Arapaho-Roosevelt National Forest and Pawnee National Grassland 40°15′33″N 105°32′13″W﻿ / ﻿40.259037°N 105.536854°W﻿ / 40.259037; -105.536854﻿ (Longhurst Lodge) | Allenspark | |
| 48 | Longmont Carnegie Library | Longmont Carnegie Library More images | November 3, 1992 (#92001406) | 457 4th Ave. 40°09′56″N 105°06′01″W﻿ / ﻿40.165556°N 105.100278°W﻿ / 40.165556; -105.100278﻿ (Longmont Carnegie Library) | Longmont | |
| 49 | Longmont College | Longmont College | August 12, 1987 (#87001285) | 546 Atwood St. 40°10′08″N 105°05′45″W﻿ / ﻿40.168889°N 105.095833°W﻿ / 40.168889; -105.095833﻿ (Longmont College) | Longmont | |
| 50 | Longmont Fire Department | Longmont Fire Department More images | May 16, 1985 (#85001063) | 667 4th Ave. 40°09′56″N 105°06′10″W﻿ / ﻿40.165556°N 105.102778°W﻿ / 40.165556; -105.102778﻿ (Longmont Fire Department) | Longmont | |
| 51 | Longmont Power Plant | Upload image | September 10, 1987 (#87001553) | Old Apple Valley Rd. 40°14′01″N 105°17′38″W﻿ / ﻿40.233611°N 105.293889°W﻿ / 40.233611; -105.293889﻿ (Longmont Power Plant) | Lyons | |
| 52 | Lyons Railroad Depot | Lyons Railroad Depot | December 2, 1974 (#74000563) | 400 block of Broadway 40°13′27″N 105°16′14″W﻿ / ﻿40.224167°N 105.270556°W﻿ / 40.224167; -105.270556﻿ (Lyons Railroad Depot) | Lyons | |
| 53 | Lyons Sandstone Buildings | Lyons Sandstone Buildings | April 29, 1980 (#80000880) | U.S. Highway 36 and State Highway 7 40°13′05″N 105°15′16″W﻿ / ﻿40.218056°N 105.254444°W﻿ / 40.218056; -105.254444﻿ (Lyons Sandstone Buildings) | Lyons | |
| 54 | McKenzie Well | McKenzie Well More images | January 26, 2005 (#04001553) | Near Independence Rd. and State Highway 119 40°02′36″N 105°14′27″W﻿ / ﻿40.043333°N 105.240833°W﻿ / 40.043333; -105.240833﻿ (McKenzie Well) | Boulder | |
| 55 | Miller House | Miller House | May 20, 1983 (#83001291) | 409 E. Cleveland St. 39°59′51″N 105°05′08″W﻿ / ﻿39.997500°N 105.085556°W﻿ / 39.997500; -105.085556﻿ (Miller House) | Lafayette | |
| 56 | Modoc Mill | Upload image | December 27, 1978 (#78000833) | North of Ward 40°04′50″N 105°30′39″W﻿ / ﻿40.080556°N 105.510833°W﻿ / 40.080556; -105.510833﻿ (Modoc Mill) | Ward | |
| 57 | Mount St. Gertrude Academy | Mount St. Gertrude Academy | November 3, 1994 (#94001227) | 970 Aurora St. 40°00′13″N 105°16′51″W﻿ / ﻿40.003611°N 105.280833°W﻿ / 40.003611; -105.280833﻿ (Mount St. Gertrude Academy) | Boulder | |
| 58 | National Fuel Company Store | National Fuel Company Store | February 14, 1986 (#86000222) | 801 Main St. 39°58′09″N 105°07′53″W﻿ / ﻿39.969167°N 105.131389°W﻿ / 39.969167; -105.131389﻿ (National Fuel Company Store) | Louisville | |
| 59 | Norlin Quadrangle Historic District | Norlin Quadrangle Historic District | March 27, 1980 (#80000879) | University of Colorado campus 40°00′32″N 105°16′20″W﻿ / ﻿40.008889°N 105.272222°W﻿ / 40.008889; -105.272222﻿ (Norlin Quadrangle Historic District) | Boulder | |
| 60 | North St. Vrain Creek Bridge | North St. Vrain Creek Bridge | October 15, 2002 (#02001159) | State Highway 7 at milepost 32.98, over the North St. Vrain Creek 40°13′22″N 105°16′18″W﻿ / ﻿40.22273°N 105.27167°W﻿ / 40.22273; -105.27167﻿ (North St. Vrain Creek Bridge) | Lyons | Single-span bridge built in 1955 |
| 61 | Northern Colorado Power Company Substation | Northern Colorado Power Company Substation | May 22, 1986 (#86001108) | 1590 Broadway 40°00′40″N 105°16′36″W﻿ / ﻿40.011111°N 105.276667°W﻿ / 40.011111; -105.276667﻿ (Northern Colorado Power Company Substation) | Boulder | |
| 62 | Petrelli-DelPizzo House | Petrelli-DelPizzo House | February 14, 1986 (#86000224) | 1016 Main St. 39°58′48″N 105°07′52″W﻿ / ﻿39.980000°N 105.131111°W﻿ / 39.980000; -105.131111﻿ (Petrelli-DelPizzo House) | Louisville | |
| 63 | Rhoades House | Rhoades House | February 14, 1986 (#86000226) | 1024 Grant 39°58′49″N 105°08′06″W﻿ / ﻿39.980278°N 105.135000°W﻿ / 39.980278; -105.135000﻿ (Rhoades House) | Louisville | |
| 64 | Robinson House | Robinson House | February 14, 1986 (#86000228) | 301 Spruce 39°58′41″N 105°08′20″W﻿ / ﻿39.97798°N 105.13893°W﻿ / 39.97798; -105.13893﻿ (Robinson House) | Louisville | House built in 1904 |
| 65 | Rock Creek Farm Rural Historic District | Rock Creek Farm Rural Historic District More images | April 20, 2023 (#100007966) | 2005 South 112th St. 39°57′01″N 105°05′35″W﻿ / ﻿39.9504°N 105.0930°W﻿ / 39.9504; -105.0930﻿ (Rock Creek Farm Rural Historic District) | Broomfield vicinity | |
| 66 | Rocky Mountain Mammoth Mine | Rocky Mountain Mammoth Mine | July 6, 2010 (#10000422) | 4879 Magnolia Dr. 39°59′08″N 105°24′01″W﻿ / ﻿39.985556°N 105.400278°W﻿ / 39.985556; -105.400278﻿ (Rocky Mountain Mammoth Mine) | Nederland | |
| 67 | St. Stephen's Episcopal Church, 1881 | St. Stephen's Episcopal Church, 1881 | February 24, 1975 (#75000501) | 470 Main St. 40°10′03″N 105°06′06″W﻿ / ﻿40.167500°N 105.101667°W﻿ / 40.167500; -105.101667﻿ (St. Stephen's Episcopal Church, 1881) | Longmont | |
| 68 | Salina School | Salina School | August 3, 1989 (#89000984) | 536 Gold Run Rd. 40°03′15″N 105°22′37″W﻿ / ﻿40.054167°N 105.376944°W﻿ / 40.054167; -105.376944﻿ (Salina School) | Salina | |
| 69 | Sandbeach Lake Trail | Upload image | January 29, 2008 (#07001471) | South of Lookout Mountain 40°13′14″N 105°32′12″W﻿ / ﻿40.220556°N 105.536667°W﻿ / 40.220556; -105.536667﻿ (Sandbeach Lake Trail) | Meeker Park | |
| 70 | Shannon Farm | Shannon Farm | October 17, 2003 (#03001047) | 1341 N. 95th St. 40°00′39″N 105°07′51″W﻿ / ﻿40.010833°N 105.130833°W﻿ / 40.010833; -105.130833﻿ (Shannon Farm) | Lafayette | |
| 71 | Squires-Tourtellot House | Squires-Tourtellot House | August 10, 1978 (#78000832) | 1019 Spruce St. 40°01′07″N 105°16′55″W﻿ / ﻿40.018611°N 105.281944°W﻿ / 40.018611; -105.281944﻿ (Squires-Tourtellot House) | Boulder | |
| 72 | Stolmes House | Stolmes House | February 14, 1986 (#86000229) | 616 Front St. 39°58′35″N 105°07′47″W﻿ / ﻿39.976389°N 105.129722°W﻿ / 39.976389; -105.129722﻿ (Stolmes House) | Louisville | |
| 73 | Sunshine School | Sunshine School | July 27, 1989 (#89000982) | 355 County Road 83 40°03′42″N 105°21′54″W﻿ / ﻿40.061529°N 105.364986°W﻿ / 40.061529; -105.364986﻿ (Sunshine School) | Sunshine | |
| 74 | Swedish Evangelical Lutheran Church of Ryssby | Swedish Evangelical Lutheran Church of Ryssby More images | February 16, 1984 (#84000797) | N. 63rd St. 40°08′23″N 105°12′20″W﻿ / ﻿40.139700°N 105.205600°W﻿ / 40.139700; -105.205600﻿ (Swedish Evangelical Lutheran Church of Ryssby) | Boulder | |
| 75 | Tego Brothers Drugstore-State National Bank of Louisville | Tego Brothers Drugstore-State National Bank of Louisville | February 14, 1986 (#86000230) | 700 Main St. 39°58′37″N 105°07′51″W﻿ / ﻿39.976944°N 105.130833°W﻿ / 39.976944; -105.130833﻿ (Tego Brothers Drugstore-State National Bank of Louisville) | Louisville | |
| 76 | The Terrace | The Terrace | November 3, 1987 (#87001287) | 207 E. Cleveland St. 39°59′54″N 105°05′17″W﻿ / ﻿39.998333°N 105.088056°W﻿ / 39.998333; -105.088056﻿ (The Terrace) | Lafayette | |
| 77 | Thomas House | Thomas House | February 14, 1986 (#86000231) | 700 Lincoln 39°58′40″N 105°08′09″W﻿ / ﻿39.977778°N 105.135833°W﻿ / 39.977778; -105.135833﻿ (Thomas House) | Louisville | |
| 78 | Thunder Lake Patrol Cabin | Thunder Lake Patrol Cabin More images | January 29, 1988 (#87001124) | Thunder Lake 40°13′20″N 105°38′39″W﻿ / ﻿40.222222°N 105.644167°W﻿ / 40.222222; -105.644167﻿ (Thunder Lake Patrol Cabin) | Estes Park | In Rocky Mountain National Park |
| 79 | Thunder Lake Trail-Bluebird Lake Trail | Upload image | January 29, 2008 (#07001472) | Roughly along the North St. Vrain Creek, west of Wild Basin Ranger Station 40°11′34″N 105°39′07″W﻿ / ﻿40.192778°N 105.651944°W﻿ / 40.192778; -105.651944﻿ (Thunder Lake Trail-Bluebird Lake Trail) | Allenspark | |
| 80 | US Post Office-Boulder Main | US Post Office-Boulder Main | January 22, 1986 (#86000164) | 1905 15th St. 40°01′42″N 105°16′31″W﻿ / ﻿40.028333°N 105.275278°W﻿ / 40.028333; -105.275278﻿ (US Post Office-Boulder Main) | Boulder | |
| 81 | Walker Ranch Historic District | Walker Ranch Historic District | June 14, 1984 (#84000798) | West of Boulder; also 7.5 miles west of Boulder off Flagstaff Rd. 39°57′14″N 105°20′03″W﻿ / ﻿39.953889°N 105.334167°W﻿ / 39.953889; -105.334167﻿ (Walker Ranch Historic District) | Boulder | Second location represents a boundary increase |
| 82 | Wall Street Assay Office | Wall Street Assay Office More images | August 3, 1989 (#89000986) | 6352 Four Mile Canyon Dr. 40°02′24″N 105°23′21″W﻿ / ﻿40.040000°N 105.389167°W﻿ / 40.040000; -105.389167﻿ (Wall Street Assay Office) | Wallstreet | Assay Office for the Storm King Mine located in Wall Street, CO |
| 83 | Ward Congregational Church | Ward Congregational Church | August 3, 1989 (#89000981) | 41 Modoc 40°04′22″N 105°30′29″W﻿ / ﻿40.072778°N 105.508056°W﻿ / 40.072778; -105.508056﻿ (Ward Congregational Church) | Ward | |
| 84 | Ward School | Ward School | August 3, 1989 (#89000980) | 66 Columbia 40°04′18″N 105°30′30″W﻿ / ﻿40.07171°N 105.50832°W﻿ / 40.07171; -105.50832﻿ (Ward School) | Ward | School built in 1898, now a post office |
| 85 | Martha Weiser House | Martha Weiser House | October 16, 2013 (#13000825) | 4020 N. 75th St. 40°03′11″N 105°10′42″W﻿ / ﻿40.052946°N 105.178256°W﻿ / 40.052946; -105.178256﻿ (Martha Weiser House) | Boulder | |
| 86 | West Side Historic District | West Side Historic District | January 7, 1987 (#86002846) | Roughly bounded by 5th, Terry, 3rd, and Grant 40°09′57″N 105°06′32″W﻿ / ﻿40.165833°N 105.108889°W﻿ / 40.165833; -105.108889﻿ (West Side Historic District) | Longmont | |
| 87 | Wild Basin House | Wild Basin House More images | January 29, 1988 (#87001125) | Wild Basin 40°12′29″N 105°33′56″W﻿ / ﻿40.208056°N 105.565556°W﻿ / 40.208056; -105.565556﻿ (Wild Basin House) | Estes Park | |
| 88 | Wild Basin Ranger Station and House | Wild Basin Ranger Station and House More images | January 29, 1988 (#87001126) | Wild Basin 40°12′32″N 105°33′55″W﻿ / ﻿40.208889°N 105.565278°W﻿ / 40.208889; -105.565278﻿ (Wild Basin Ranger Station and House) | Estes Park | |
| 89 | Woodward-Baird House | Woodward-Baird House | February 15, 1979 (#79000574) | 1733 Canyon Boulevard 40°01′03″N 105°16′16″W﻿ / ﻿40.017500°N 105.271111°W﻿ / 40.017500; -105.271111﻿ (Woodward-Baird House) | Boulder | |

## Former listings

| | Name on the Register | Image | Date listed | Date removed | Location | City or town | Description |
| 1 | Snowbound Mine | Snowbound Mine | August 3, 1989 (#89000998) | July 11, 2016 | County Road 52 40°04′19″N 105°23′01″W﻿ / ﻿40.071944°N 105.383611°W﻿ / 40.071944; -105.383611﻿ (Snowbound Mine) | Gold Hill | Burned down September 6, 2010 |
| 2 | Wilbur Williams House | Wilbur Williams House | June 3, 1982 (#82002286) | October 18, 1988 | 1434 Baseline Rd. | Boulder | Removed from Register due to extensive alterations |