# National Register of Historic Places listings in Union County, Oregon

This list presents the full set of buildings, structures, objects, sites, or districts designated on the National Register of Historic Places in Union County, Oregon, United States, and offers brief descriptive information about each of them. The National Register recognizes places of national, state, or local historic significance across the United States. Out of over 90,000 National Register sites nationwide, Oregon is home to over 2,000, and 20 of those are found in Union County.
This National Park Service list is complete through NPS recent listings posted February 28, 2025.

## Current listings

| | Name on the Register | Image | Date listed | Location | City or town | Description |
| 1 | Administration Building | Administration Building More images | February 27, 1980 (#80003384) | Eastern Oregon University campus 45°19′17″N 118°05′25″W﻿ / ﻿45.321508°N 118.090349°W﻿ / 45.321508; -118.090349﻿ (Administration Building) | La Grande | |
| 2 | John Anthony House | John Anthony House | September 22, 1988 (#88001530) | 1606 6th Street 45°19′33″N 118°05′41″W﻿ / ﻿45.325951°N 118.094744°W﻿ / 45.325951; -118.094744﻿ (John Anthony House) | La Grande | |
| 3 | Anthony–Buckley House | Anthony–Buckley House | February 28, 1985 (#85000372) | 1602 6th Street 45°19′33″N 118°05′40″W﻿ / ﻿45.32571°N 118.0944°W﻿ / 45.32571; -118.0944﻿ (Anthony–Buckley House) | La Grande | |
| 4 | Ascension Episcopal Church and Rectory | Ascension Episcopal Church and Rectory More images | December 3, 1974 (#74001718) | Church Street 45°17′52″N 117°48′47″W﻿ / ﻿45.297900°N 117.813100°W﻿ / 45.297900; -117.813100﻿ (Ascension Episcopal Church and Rectory) | Cove | |
| 5 | Dry Creek School | Dry Creek School | August 31, 2000 (#00001019) | 69281 Summerville Road 45°31′17″N 118°01′34″W﻿ / ﻿45.521294°N 118.025989°W﻿ / 45.521294; -118.025989﻿ (Dry Creek School) | Summerville vicinity | |
| 6 | Abel E. Eaton House | Abel E. Eaton House More images | November 2, 1977 (#77001115) | 464 N. Main Street 45°12′42″N 117°51′57″W﻿ / ﻿45.211719°N 117.865840°W﻿ / 45.211719; -117.865840﻿ (Abel E. Eaton House) | Union | This fine French Second Empire house represents a style unusual in Eastern Oregon. It was built ca. 1900 for Abel Eaton, a prosperous businessman, civic leader, and mayor. It stands in the north Union neighborhood that was the town's upscale residential area during its period of rapid growth in the late 19th and early 20th centuries. |
| 7 | Elgin City Hall and Opera House | Elgin City Hall and Opera House More images | October 10, 1980 (#80003383) | 100 N. 8th Street 45°33′56″N 117°55′02″W﻿ / ﻿45.5655°N 117.9173°W﻿ / 45.5655; -117.9173﻿ (Elgin City Hall and Opera House) | Elgin | |
| 8 | Foley Building | Foley Building | December 2, 1985 (#85003080) | 206 Chestnut Street 45°19′47″N 118°05′44″W﻿ / ﻿45.32965°N 118.095462°W﻿ / 45.32965; -118.095462﻿ (Foley Building) | La Grande | |
| 9 | Hot Lake Resort | Hot Lake Resort More images | March 15, 1979 (#79002148) | 66172 Highway 203 45°14′35″N 117°57′28″W﻿ / ﻿45.24313°N 117.9577°W﻿ / 45.24313; -117.9577﻿ (Hot Lake Resort) | La Grande vicinity | |
| 10 | A. B. Hudelson and Son Building | A. B. Hudelson and Son Building | October 28, 1999 (#99001286) | 200 E Street 45°01′39″N 117°55′08″W﻿ / ﻿45.02741°N 117.9188°W﻿ / 45.02741; -117.9188﻿ (A. B. Hudelson and Son Building) | North Powder | |
| 11 | La Grande Commercial Historic District | La Grande Commercial Historic District More images | September 3, 2001 (#01000933) | Roughly bounded by Union Pacific Railroad tracks along Jefferson Street, Greenwood and Cove Streets, Washington Street, and 4th Street 45°19′41″N 118°05′36″W﻿ / ﻿45.327943°N 118.093397°W﻿ / 45.327943; -118.093397﻿ (La Grande Commercial Historic District) | La Grande | |
| 12 | La Grande Neighborhood Club | La Grande Neighborhood Club | July 15, 1988 (#88001042) | 1108 N Avenue 45°19′26″N 118°05′43″W﻿ / ﻿45.32381°N 118.0954°W﻿ / 45.32381; -118.0954﻿ (La Grande Neighborhood Club) | La Grande | |
| 13 | Liberty Theater | Liberty Theater | August 5, 1999 (#99000948) | 1008–1010 Adams Avenue 45°19′45″N 118°05′45″W﻿ / ﻿45.329123°N 118.095766°W﻿ / 45.329123; -118.095766﻿ (Liberty Theater) | La Grande | |
| 14 | Oregon Trail: La Grande to Hilgard Segment | Oregon Trail: La Grande to Hilgard Segment More images | June 28, 2021 (#100006679) | Hilgard Quadrangle, T3S R37E Secs. 10, 11, 12; T3S R38E Sec. 7 (South of I 84 between La Grande and Hilgard) $^{Coordinatesmissing}$ | La Grande | |
| 15 | Roesch Building | Roesch Building | June 3, 1996 (#96000623) | 101–111 Fir Street 45°19′36″N 118°05′34″W﻿ / ﻿45.326737°N 118.092873°W﻿ / 45.326737; -118.092873﻿ (Roesch Building) | La Grande | |
| 16 | Slater Building | Slater Building | August 11, 1983 (#83002179) | 214–224 Fir Street 45°19′41″N 118°05′31″W﻿ / ﻿45.327952°N 118.091957°W﻿ / 45.327952; -118.091957﻿ (Slater Building) | La Grande | |
| 17 | August J. Stange House | August J. Stange House | September 27, 1996 (#96001048) | 1612 Walnut Street 45°19′33″N 118°06′15″W﻿ / ﻿45.32583°N 118.1041°W﻿ / 45.32583; -118.1041﻿ (August J. Stange House) | La Grande | |
| 18 | W. J. Townley House | W. J. Townley House | November 6, 1980 (#80003386) | 782 N. 5th Street 45°12′50″N 117°52′14″W﻿ / ﻿45.21396°N 117.8706°W﻿ / 45.21396; -117.8706﻿ (W. J. Townley House) | Union | |
| 19 | U.S. Post Office and Federal Building | U.S. Post Office and Federal Building | January 25, 1979 (#79002149) | 1000 Adams Avenue 45°19′46″N 118°05′46″W﻿ / ﻿45.329348°N 118.096077°W﻿ / 45.329348; -118.096077﻿ (U.S. Post Office and Federal Building) | La Grande | |
| 20 | Union Main Street Historic District | Union Main Street Historic District More images | August 20, 1997 (#97000907) | Along Main Street, between Birch and Fulton Streets 45°12′33″N 117°51′56″W﻿ / ﻿45.209228°N 117.865463°W﻿ / 45.209228; -117.865463﻿ (Union Main Street Historic District) | Union | The buildings of Union's downtown core and oldest residential neighborhoods recall the town's long and vitalizing, but ultimately unsuccessful, rivalry in the late 19th century with nearby La Grande to lead Union County in transportation, commerce, population, and government. Significant structures include many from Union's period of rapid growth from its early years through World War I (1870–1919), and a smaller number from the decades just after the town reached its zenith (1920–1940). |

## Former listings

| | Name on the Register | Image | Date listed | Date removed | Location | City or town | Description |
| 1 | Union County Alliance Flouring Mill | Upload image | August 25, 1980 (#80003385) | November 25, 1986 | Willow St. and E. M Ave. | La Grande | Destroyed by fire on May 21, 1986. |