The story so far
from the U.S. CensusBetween the 2010 and 2020 censuses its population fell from 63 to 53 (-16%). Half of its homes were built before 1938.
Wikipedia doesn’t have a history of Harmony yet — the old photos, dates and memories neighbors add here are how it gets written.
Be one of the first
Start Harmony’s collection
The first neighbors to add old photos shape how Harmony’s history is told.
0 of 10 decades since 1900 have photos 📦Share a family photoSign in to add one+10By decade
Harmony, decade by decade
Before
2000
2000
No old photos in the archives yetWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
📷 Add from your albumNational Register of Historic Places
1 historic place in Harmony
1 place in Harmony is on the National Register of Historic Places, the country’s official list of buildings and places worth saving.
#156
In South Dakotaby listings · most towns there have none
1place listed1 building
0National Historic LandmarksNone here yet
8historic buildings protectedcounting each building in a district
1982first listedHarlow Farmstead
Where they are
Tap a dot for a photo and link. Districts show at their center.
Buildings
When they were listed
The Register began in 1966.
60s
70s
180s
90s
00s
10s
20s
National Park Service, National Register of Historic Places (05/22/2026) · styles from the National Archives catalog · photos from Wikimedia Commons, credited on each place
Then & now
When neighbors add old photos, retakes from the same spot appear here side by side.