174 years in pictures
Census counts: 235 in 1880, a peak of 367 in 1900, 175 in 2020. The archive holds 6 old photos and papers going back to 1937 and a map from 1981 on.
- 1852Decatur is settled
Each edition grades its towns against each other only.

Decatur’s typical journey to work is 38 minutes, above both Iowa’s towns (19 minutes) and U.S. towns (25 minutes). Of the 141 Iowa towns we compare, none has a higher owner-occupancy rate than Decatur. Decatur has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Where Decatur beats most towns.
In a town this size, neighbors are the best guide. Ask them anything.
Census counts: 235 in 1880, a peak of 367 in 1900, 175 in 2020. The archive holds 6 old photos and papers going back to 1937 and a map from 1981 on.
Who provides power, water and the rest in Decatur, and how to reach them.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
Ordered by what stands out in Decatur.
The top destinations are Lamoni (31%), Osceola (13%) and Des Moines (7%). The median commute is under 21 miles.
Census LEHD 2023 · ACS
In July, afternoons reach 86°; in January, nights fall to 14°, and about 27 inches of snow falls in a winter.
NOAA U.S. Climate Normals, 1991–2020
Federal aid has come to Decatur households in 2 declared disasters; the latest was in 2010. On expected storm and flood damage, Decatur sits below 62% of U.S. communities. 25% of the town’s expected losses from natural hazards come from drought, followed by inland flooding at 24%.
FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA
1 within 15 miles of the center of Decatur
About 1 of every 100 Decatur residents are enrolled in college, against 6 across Iowa.
Where Decatur’s working residents go each day. Line width shows the share.
Census LEHD 2023
City in Iowa, United States
Decatur is a city in Decatur County, Iowa, United States. The population was 175 at the time of the 2020 census.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
Short answers, built from the data on this page.
Decatur has fewer than 1,000 residents, too few for fair grades; the figures below are still real.