# National Register of Historic Places listings in Adair County, Iowa

This is a list of the National Register of Historic Places listings in Adair County, Iowa.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Adair County, Iowa, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.
There are 9 properties and districts listed on the National Register in the county.
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 | Adair County Courthouse | Adair County Courthouse More images | July 2, 1981 (#81000224) | Iowa Ave. and 1st St. 41°18′18″N 94°27′40″W﻿ / ﻿41.305109°N 94.461052°W﻿ / 41.305109; -94.461052﻿ (Adair County Courthouse) | Greenfield | Romanesque Revival style brick courthouse built in 1891. |
| 2 | Adair County Democrat-Adair County Free Press Building | Upload image | February 7, 2011 (#10001203) | 108 E. Iowa St. 41°18′18″N 94°27′36″W﻿ / ﻿41.304916°N 94.459949°W﻿ / 41.304916; -94.459949﻿ (Adair County Democrat-Adair County Free Press Building) | Greenfield | |
| 3 | Adair Viaduct | Adair Viaduct More images | June 25, 1998 (#98000775) | Business Route 80 over the Iowa Interstate Railroad tracks 41°29′50″N 94°38′36″W﻿ / ﻿41.497222°N 94.643472°W﻿ / 41.497222; -94.643472﻿ (Adair Viaduct) | Adair | A ribbed open spandrel type of arch bridge spanning 80 feet. |
| 4 | Catalpa | Catalpa | November 13, 1974 (#74000776) | In NRHP documents: "Southeast of Greenfield". Actual street address: 2773 290th Street, Orient, IA. 41°13′55″N 94°21′37″W﻿ / ﻿41.231944°N 94.360278°W﻿ / 41.231944; -94.360278﻿ (Catalpa) | Greenfield | Also known as Wallace Farm, this farm was once owned by Henry Cantwell Wallace, American farmer, journalist, and political activist. |
| 5 | Chicago, Rock Island and Pacific Railroad: Stuart Passenger Station | Chicago, Rock Island and Pacific Railroad: Stuart Passenger Station | February 19, 1980 (#80001428) | Front St. 41°30′12″N 94°19′01″W﻿ / ﻿41.503472°N 94.316806°W﻿ / 41.503472; -94.316806﻿ (Chicago, Rock Island and Pacific Railroad: Stuart Passenger Station) | Stuart | |
| 6 | Greenfield Public Square Historic District | Upload image | September 17, 2014 (#14000623) | 102–362 Public Square, 201–215 S. 1st St., 107–110 E. Iowa St. 41°18′18″N 94°27′40″W﻿ / ﻿41.304885°N 94.461030°W﻿ / 41.304885; -94.461030﻿ (Greenfield Public Square Historic District) | Greenfield | |
| 7 | Hotel Greenfield | Hotel Greenfield | November 18, 2011 (#11000812) | 110 E. Iowa St. 41°18′18″N 94°27′35″W﻿ / ﻿41.304898°N 94.459783°W﻿ / 41.304898; -94.459783﻿ (Hotel Greenfield) | Greenfield | |
| 8 | Loucks Grove Church | Upload image | November 22, 1995 (#95001314) | 7 miles north of the junction of Iowa Highways 25 and 92, then 3 miles east and 1.5 miles north on an unnamed county road 41°25′30″N 94°23′40″W﻿ / ﻿41.425°N 94.394444°W﻿ / 41.425; -94.394444﻿ (Loucks Grove Church) | Greenfield | |
| 9 | Warren Opera House Block and Hetherington Block | Warren Opera House Block and Hetherington Block | October 18, 1979 (#79000880) | 156 Public Sq. 41°18′18″N 94°27′37″W﻿ / ﻿41.304942°N 94.460193°W﻿ / 41.304942; -94.460193﻿ (Warren Opera House Block and Hetherington Block) | Greenfield | |