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zipcodes.pro — CITY/SD/GROTON

Groton ZIP code, South Dakota

The ZIP code for Groton, SD is 57445, and its area code is 605.

USPS city name
1 ZIP code
Population
1,691
Area code
605

Groton in numbers

About 1,691 people live in Groton, in 625 households, the 48th-largest of South Dakota's 439 census places. The median household income is $89,861 a year, 20% above the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $190,600 (26% below the South Dakota median), and median gross rent is $981 a month. The median age is 33.9; 35.5% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 17 minutes.

Population1,691Groton1,691
Households625Groton625
Median age33.9Groton33.9South Dakota38.0US 38.9
Median household income$89,861Groton$89,861South Dakota$75,081US $80,734
Median home value$190,600Groton$190,600South Dakota$257,400US $332,700
Median gross rent$981Groton$981South Dakota$946US $1,413
Bachelor's degree or higher35.5%Groton35.5%South Dakota31.9%US 35.7%
Mean commute16.8 minGroton16.8 minSouth Dakota17.8 minUS 26.4 min
Population density966 / sq miGroton966 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Groton city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Groton

ZIP codes with the USPS city name Groton
ZIP City Type Population Median income Median home
57445 Groton , SD Standard 2,072 $84,948 $193,800

Map of Groton ZIP codes

57445

The ZIP codes of Groton, SD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Groton

The nearest larger towns are Aberdeen (28,189 people, 18 mi), Webster (1,896 people, 29 mi) and Redfield (1,989 people, 45 mi).

Towns near Groton
TownPopulationDistance
Aberdeen 28,189 17.9 mi

More nearby: every ZIP code in Brown County · South Dakota ZIP codes

Cite this page

zipcodes.pro. “Groton, SD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sd/groton

Underlying data is public domain or openly licensed — sources, vintages and licences.