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Zip Code 57551 — Martin, SD

ZIP Code 57551 is associated with Martin, SD, in Bennett County. The listed population estimate is 2,084; estimated density is 1.1 people per square mile. Among records with population estimates, it ranks #1 of 3 in Bennett County and #66 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (43.180870, -101.700120)

Data MetricLocal Statistic
Postal / Zip Code57551
Primary CityMartin
State / ProvinceSD
CountyBennett
Total Population2,084
Population Density1.1 people/sq mi
TimezoneAmerica/Denver

How 57551 Compares

MetricZIP 57551Bennett County recordsSD records
Population estimate2,0843,301 (sum)906,188 (sum)
Population Density1.1 /sq mi----
County population rank#1 of 3----
State population rank#66 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 57714Allen14.9 mi1,144
ZIP 57574Tuthill17.7 mi73
ZIP 57577Wanblee23.8 mi940
ZIP 57547Long Valley24.6 mi383
ZIP 57716Batesland27.1 mi201

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 →