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Zip Code 57256 — Ortley, SD

ZIP Code 57256 is associated with Ortley, SD, in Grant County. The listed population estimate is 238; estimated density is 2.1 people per square mile. Among records with population estimates, it ranks #5 of 10 in Grant County and #286 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.249180, -97.201560)

Data MetricLocal Statistic
Postal / Zip Code57256
Primary CityOrtley
State / ProvinceSD
CountyGrant
Total Population238
Population Density2.1 people/sq mi
TimezoneAmerica/Chicago

How 57256 Compares

MetricZIP 57256Grant County recordsSD records
Population estimate2388,747 (sum)906,188 (sum)
Population Density2.1 /sq mi----
County population rank#5 of 10----
State population rank#286 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 57266Summit6.0 mi626
ZIP 57273Waubay6.8 mi1,165
ZIP 57263South Shore12.1 mi351
ZIP 57251Marvin13.0 mi228
ZIP 57235Florence13.6 mi774

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 →