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Zip Code 57631 — Glenham, SD

ZIP Code 57631 is associated with Glenham, SD, in Walworth County. The listed population estimate is 364; estimated density is 1.1 people per square mile. Among records with population estimates, it ranks #2 of 4 in Walworth County and #243 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.581950, -100.287790)

Data MetricLocal Statistic
Postal / Zip Code57631
Primary CityGlenham
State / ProvinceSD
CountyWalworth
Total Population364
Population Density1.1 people/sq mi
TimezoneAmerica/Chicago

How 57631 Compares

MetricZIP 57631Walworth County recordsSD records
Population estimate3641,925 (sum)906,188 (sum)
Population Density1.1 /sq mi----
County population rank#2 of 4----
State population rank#243 of 372----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in SD

ZIP CodeCityDistancePopulation estimate
ZIP 57646Mound City13.4 mi272
ZIP 57472Selby13.9 mi1,165
ZIP 57658Wakpala14.1 mi319
ZIP 57601Mobridge18.4 mi3,422
ZIP 57452Java20.4 mi136

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →