Spencer, Iowa

Spencer population, 2020 to 2024

Spencer added 114 residents from July 2020 to July 2024, a change of +1.0%. In the latest year it moved by -46. Among 85 Iowa places of 5,000 or more, that growth ranks 44th; the median place changed by +1.1%. The median place of 5,000+ in Iowa has 9,511 people, so Spencer is 1.2 times that size.

Spencer covers 10.95 square miles of land and 0.16 of water, for 1,043 people per square mile of land. The median Iowa place of 5,000+ has 1,363, so Spencer is less dense than the typical town.

What county Spencer is in

All of Spencer's residents live in Clay County, which had 16,474 residents in 2024. Spencer holds 69.3% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Spencer

1 ZIP Code Tabulation Area (ZCTA) overlaps Spencer by at least 10% of the ZCTA's or the city's land: 51301. 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 Spencer is

The Census internal point of Spencer is at 43.147000, -95.152700. Des Moines, the capital, is 133.4 miles SE in a straight line. The nearest larger place is Storm Lake, IA (11,627 people), 34.9 miles away. The nearest city of 100,000 or more is Sioux Falls, SD, 83.9 miles away.

Daylight in Spencer

At 43.15° N, Spencer gets about 15 h 23 min of daylight around the June solstice and 8 h 59 min around the December solstice, a swing of 6 h 24 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Spencer

The eight nearest incorporated places of 1,000+ in Iowa, measured between internal points. The closest is Milford, 13.5 miles away, with 3,258 people.