PlainZIP

Frankfort, SD

Single-footprint Census roll-up for Frankfort, SD: 1 USPS ZIP, population 612. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet FRANKFORT-SD · Frankfort, SD 1 ZIPs · 612 pop · #20125/25278 · Spink County

INC-MID · RANK-LOWER · BELOW-PEER · BOOK-ONE · OWN-HIGH · POP-VILLAGE · SPREAD-UNK · HOME-LOW

  • INC-MID $54,625
  • RANK-LOWER #20125/25278
  • BELOW-PEER under Turton
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 98% owners
  • POP-VILLAGE 612
  • SPREAD-UNK Single-ZIP book
  • HOME-LOW $132,800

Nearest income peer: Turton, SD (+ $4,750 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Frankfort

Lowest/highest poles plus county-sharing cities nearest Frankfort on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Frankfort, SD sits among US cities with one of the lowest household incomes among US cities, on a village-scale population base, across a single-ZIP footprint.

20th pct
household income vs 25,278 US cities
612
city population (Census)
1
USPS ZIP codes covered
$54,625
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Lower-income footing on only 1 ZIP ($54,625 average) · poverty 18.5%. The primary code (57440) carries the ACS household fields that matter.

Owner-occupancy here runs high (97.5%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within South Dakota, Lake Andes is the closest lower-income city and Whitehorse the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Frankfort.

Population concentration

One ZIP, 57440, is all of Frankfort

There is no split to weigh here: 57440 holds every one of Frankfort's 612 ACS residents. City-level and ZIP-level numbers on this site are the same number twice, check the ZIP page for the income/tenure/commute breakdown.

Census ZBP business roll-up

Sparse ZBP book inside single-ZIP Frankfort

Citywide ZBP: 4 establishments, 9 employees , annual payroll $429k (~7 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 57440 (4 units) .

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ZIP Codes in Frankfort, SD

These ZIP codes sit in Spink County, which covers 9 ZIP codes in all; 1 of them fall in Frankfort. See the Spink County roll-up →

Every one of the 7 cities sharing Spink County reports a higher average ZIP median income than Frankfort, Redfield, Tulare and Mellette among them. That gap is the county's income spread, not a measure of the housing or commute picture below. Northville marks the far end of that range at $120,250, 120% above Frankfort.

ZIP Code Population Median income Establishments Density
57440 612 $54,625 4 2
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Frankfort roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Frankfort, .