Groton, South Dakota

Groton population, 2020 to 2024

Groton lost 38 residents from July 2020 to July 2024, a change of -2.8%. In the latest year it moved by -9.

Groton covers 1.75 square miles of land, for 767 people per square mile of land. The median South Dakota place of 5,000+ has 1,459, so Groton is less dense than the typical town.

What county Groton is in

All of Groton's residents live in Brown County, which had 37,495 residents in 2024. Groton holds 3.6% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Groton

1 ZIP Code Tabulation Area (ZCTA) overlaps Groton by at least 10% of the ZCTA's or the city's land: 57445. 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 Groton is

The Census internal point of Groton is at 45.451700, -98.100100. Pierre, the capital, is 133.0 miles WSW in a straight line. The nearest larger place is Aberdeen, SD (27,919 people), 17.8 miles away. The nearest city of 100,000 or more is Fargo, ND, 115.0 miles away.

Daylight in Groton

At 45.45° N, Groton gets about 15 h 41 min of daylight around the June solstice and 8 h 43 min around the December solstice, a swing of 6 h 58 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Groton

The eight nearest incorporated places of 1,000+ in South Dakota, measured between internal points. The closest is Aberdeen, 17.9 miles away, with 27,919 people.