# National Register of Historic Places listings in Adams County, Indiana

This is a list of the National Register of Historic Places listings in Adams County, Indiana.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Adams County, Indiana, 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 10 properties and districts listed on the National Register in the county.
Properties and districts located in incorporated areas display the name of the municipality, while properties and districts in unincorporated areas display the name of their civil township. Properties and districts split between multiple jurisdictions display the names of all jurisdictions.
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 |
| 1 | Adams County Courthouse | Adams County Courthouse More images | September 17, 2008 (#08000914) | 112 S. 2nd St. 40°49′47″N 84°55′28″W﻿ / ﻿40.829722°N 84.924444°W﻿ / 40.829722; -84.924444﻿ (Adams County Courthouse) | Decatur |
| 2 | John S. Bowers House | John S. Bowers House | March 5, 1982 (#82000055) | 104 Marshall St. 40°50′04″N 84°55′26″W﻿ / ﻿40.834444°N 84.923889°W﻿ / 40.834444; -84.923889﻿ (John S. Bowers House) | Decatur |
| 3 | Ceylon Covered Bridge | Ceylon Covered Bridge More images | January 25, 2007 (#06001289) | County Road 900S over the Wabash River in Limberlost County Park, northeast of Ceylon 40°36′51″N 84°56′35″W﻿ / ﻿40.614167°N 84.943056°W﻿ / 40.614167; -84.943056﻿ (Ceylon Covered Bridge) | Wabash Township |
| 4 | Ben Colter Polygonal Barn | Ben Colter Polygonal Barn | April 2, 1993 (#93000194) | Eastern side of State Road 101, 0.6 miles south of its junction with Piqua Rd. and north of Pleasant Mills 40°47′53″N 84°50′27″W﻿ / ﻿40.798056°N 84.840833°W﻿ / 40.798056; -84.840833﻿ (Ben Colter Polygonal Barn) | St. Marys Township |
| 5 | Decatur Homesteads | Upload image | December 6, 2022 (#100008407) | Each side of Homestead Dr. and the west side of High St. 40°48′49″N 84°55′12″W﻿ / ﻿40.81369°N 84.9201°W﻿ / 40.81369; -84.9201﻿ (Decatur Homesteads) | Decatur |
| 6 | Charles Dugan House | Charles Dugan House | December 22, 2009 (#09001124) | 420 W. Monroe St. 40°49′52″N 84°55′40″W﻿ / ﻿40.831231°N 84.927711°W﻿ / 40.831231; -84.927711﻿ (Charles Dugan House) | Decatur |
| 7 | Geneva Downtown Commercial Historic District | Geneva Downtown Commercial Historic District More images | March 21, 2002 (#02000196) | 144-455 E. Line St. 40°35′33″N 84°57′33″W﻿ / ﻿40.5925°N 84.959167°W﻿ / 40.5925; -84.959167﻿ (Geneva Downtown Commercial Historic District) | Geneva |
| 8 | Grand Rapids and Indiana Railroad Depot | Grand Rapids and Indiana Railroad Depot | March 6, 2017 (#100000712) | 111 N. 7th St. 40°49′44″N 84°55′48″W﻿ / ﻿40.828889°N 84.930000°W﻿ / 40.828889; -84.930000﻿ (Grand Rapids and Indiana Railroad Depot) | Decatur |
| 9 | Lenhart Farmhouse | Lenhart Farmhouse More images | June 27, 2002 (#02000688) | 6929 N. Piqua Rd., north of Decatur 40°50′47″N 84°55′12″W﻿ / ﻿40.846389°N 84.92°W﻿ / 40.846389; -84.92﻿ (Lenhart Farmhouse) | Root Township |
| 10 | Gene Stratton Porter Cabin | Gene Stratton Porter Cabin More images | June 27, 1974 (#74000027) | 200 E. 6th St. 40°35′13″N 84°57′36″W﻿ / ﻿40.586944°N 84.960000°W﻿ / 40.586944; -84.960000﻿ (Gene Stratton Porter Cabin) | Geneva |