Denison, Iowa

Denison population, 2020 to 2024

Denison lost 61 residents from July 2020 to July 2024, a change of -0.7%. In the latest year it moved by +111. Among 85 Iowa places of 5,000 or more, that growth ranks 62nd; the median place changed by +1.1%. The median place of 5,000+ in Iowa has 9,511 people, so Denison is 87% of it.

Denison covers 6.54 square miles of land and 0.03 of water, for 1,269 people per square mile of land. The median Iowa place of 5,000+ has 1,363, so Denison is close to the typical town.

What county Denison is in

All of Denison's residents live in Crawford County, which had 16,378 residents in 2024. Denison holds 50.7% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Denison

1 ZIP Code Tabulation Area (ZCTA) overlaps Denison by at least 10% of the ZCTA's or the city's land: 51442. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Denison is

The Census internal point of Denison is at 42.015900, -95.352400. Des Moines, the capital, is 94.7 miles ESE in a straight line. The nearest larger place is Carroll, IA (10,125 people), 25.3 miles away. The nearest city of 100,000 or more is Omaha, NE, 63.4 miles away.

Daylight in Denison

At 42.02° N, Denison gets about 15 h 15 min of daylight around the June solstice and 9 h 07 min around the December solstice, a swing of 6 h 08 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Denison

The eight nearest incorporated places of 1,000+ in Iowa, measured between internal points. The closest is Manning, 16.5 miles away, with 1,390 people.