Seneca, SD ZIP Codes

One ZIP code serves Seneca, South Dakota: 57473. Together they are home to 246 residents in 91 households. That is more than the 22 people counted inside Seneca town limits, because these ZIP codes reach past its boundary.

Seneca town limits (Census)

MeasureCensus figure
Residents22
Households13
Median household incomenot published
Median home valuenot published
Median age67.3
Median rentnot published

All 1 ZIP codes together

MeasureValue
Residents (sum of ZIP codes)246
Households (sum of ZIP codes)91
Median household income, range across ZIP codes$23,750 (57473) to $23,750 (57473)
Household-weighted average of ZIP medians (an approximation, not a true median)$23,750
Homeowners95.6%
Households with kids under 1841.8%
Moved in the past year0.0%
Carrier routes in EDDM2GO's route librarynot loaded yet

Every ZIP code in Seneca

ZIPMailing cityResidentsHouseholdsMedian incomeHome valueHomeownersWith kidsNew moversCarrier routesMailboxesWhy listed
57473Seneca24691$23,750$177,60095.6%41.8%0.0%——0% of its land; mailing city

A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca town limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Seneca. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Seneca.

Counties

Price a mailing to Seneca ZIP codes

EDDM guides

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Frequently asked questions

What ZIP codes are in Seneca, SD?
57473. A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca town limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Seneca.
What is the population of Seneca, SD?
The Census Bureau counts 22 residents inside Seneca town limits (ACS 2020–2024). The 1 ZIP code that serve Seneca hold 246 residents in all.
What is the median household income in Seneca, SD?
Across its ZIP codes the medians run from $23,750 to $23,750.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.