Marshalltown, Iowa

Marshalltown population, 2020 to 2024

Marshalltown added 308 residents from July 2020 to July 2024, a change of +1.1%. In the latest year it moved by +149. Among 85 Iowa places of 5,000 or more, that growth ranks 43rd; the median place changed by +1.1%. The median place of 5,000+ in Iowa has 9,511 people, so Marshalltown is 2.9 times that size.

Marshalltown covers 19.20 square miles of land and 0.03 of water, for 1,452 people per square mile of land. The median Iowa place of 5,000+ has 1,363, so Marshalltown is close to the typical town.

What county Marshalltown is in

All of Marshalltown's residents live in Marshall County, which had 40,392 residents in 2024. Marshalltown holds 69.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Marshalltown

1 ZIP Code Tabulation Area (ZCTA) overlaps Marshalltown by at least 10% of the ZCTA's or the city's land: 50158. 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 Marshalltown is

The Census internal point of Marshalltown is at 42.034300, -92.906300. Des Moines, the capital, is 47.2 miles SW in a straight line. The nearest larger place is Ames, IA (69,026 people), 36.7 miles away. The nearest city of 100,000 or more is Des Moines, IA, 48.3 miles away.

Daylight in Marshalltown

At 42.03° N, Marshalltown 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 Marshalltown

The eight nearest incorporated places of 1,000+ in Iowa, measured between internal points. The closest is Conrad, 13.2 miles away, with 1,098 people.