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Delaware: demographics by county and ZIP code

Olympus publishes Census demographics for 3 counties or county equivalents and 68 ZIP Code Tabulation Areas (ZCTAs) in Delaware (ACS 5-year 2020-2024). Each has its own page with population, income, home value, rent, education, poverty and unemployment estimates and their margins of error.

A ZCTA is listed under the state of its primary (2020) county, even when it crosses a state line. Population figures below are ACS 5-year estimates with 90% margins of error.

Data as of Oct 22, 2026 (Olympus publication) · Markdown version

  • ZCTAs are Census statistical areas that approximate USPS ZIP code delivery areas; the code was matched to the ZCTA with the same code, which may not cover the same addresses as the ZIP code.
  • Values are ACS 5-year estimates for 2020-2024 (dollars in 2024 dollars), not current figures.

Counties (3)

CountyFIPSTotal population
Kent County, Delaware10001187,604
New Castle County, Delaware10003577,961
Sussex County, Delaware10005255,626

ZIP Code Tabulation Areas (68)

ZCTAPrimary countyTotal population
19701New Castle County, Delaware42,984 (±2,580)
19702New Castle County, Delaware55,683 (±3,101)
19703New Castle County, Delaware15,460 (±1,015)
19706New Castle County, Delaware2,038 (±400)
19707New Castle County, Delaware17,376 (±1,686)
19709New Castle County, Delaware53,234 (±1,445)
19710New Castle County, Delaware0 (±13)
19711New Castle County, Delaware49,432 (±1,932)
19713New Castle County, Delaware30,747 (±1,687)
19716New Castle County, Delaware0 (±13)
19717New Castle County, Delaware6,036 (±355)
19720New Castle County, Delaware62,392 (±2,703)
19730New Castle County, Delaware425 (±218)
19731New Castle County, Delaware655 (±509)
19732New Castle County, Delaware89 (±67)
19733New Castle County, Delaware186 (±134)
19734New Castle County, Delaware14,214 (±1,286)
19735New Castle County, Delaware0 (±13)
19736New Castle County, Delaware127 (±163)
19801New Castle County, Delaware16,327 (±1,087)
19802New Castle County, Delaware26,051 (±1,508)
19803New Castle County, Delaware22,279 (±1,291)
19804New Castle County, Delaware18,779 (±1,291)
19805New Castle County, Delaware41,402 (±2,123)
19806New Castle County, Delaware9,777 (±833)
19807New Castle County, Delaware7,815 (±730)
19808New Castle County, Delaware39,082 (±2,040)
19809New Castle County, Delaware14,311 (±1,428)
19810New Castle County, Delaware26,530 (±1,421)
19901Kent County, Delaware37,763 (±1,950)
19902Kent County, Delaware44 (±9)
19904Kent County, Delaware38,818 (±1,936)
19930Sussex County, Delaware3,014 (±325)
19931Sussex County, Delaware375 (±202)
19933Sussex County, Delaware10,597 (±1,393)
19934Kent County, Delaware14,061 (±1,516)
19936Kent County, Delaware152 (±86)
19938Kent County, Delaware9,561 (±945)
19939Sussex County, Delaware7,490 (±846)
19940Sussex County, Delaware7,540 (±1,049)
19941Sussex County, Delaware3,435 (±822)
19943Kent County, Delaware13,410 (±1,300)
19944Sussex County, Delaware636 (±106)
19945Sussex County, Delaware9,640 (±887)
19946Kent County, Delaware5,603 (±858)
19947Sussex County, Delaware20,760 (±1,469)
19950Sussex County, Delaware7,918 (±797)
19951Sussex County, Delaware2,245 (±405)
19952Kent County, Delaware10,908 (±1,077)
19953Kent County, Delaware5,255 (±1,029)
19954Kent County, Delaware1,427 (±358)
19955Kent County, Delaware352 (±356)
19956Sussex County, Delaware16,327 (±1,344)
19958Sussex County, Delaware31,938 (±1,273)
19960Sussex County, Delaware6,774 (±1,037)
19962Kent County, Delaware13,770 (±1,262)
19963Sussex County, Delaware23,500 (±1,374)
19964Kent County, Delaware1,418 (±670)
19966Sussex County, Delaware35,884 (±1,795)
19967Sussex County, Delaware2,376 (±386)
19968Sussex County, Delaware15,486 (±1,144)
19970Sussex County, Delaware8,524 (±724)
19971Sussex County, Delaware14,886 (±1,049)
19973Sussex County, Delaware26,834 (±1,722)
19975Sussex County, Delaware10,862 (±681)
19977Kent County, Delaware27,704 (±1,378)
19979Kent County, Delaware619 (±204)
19980Kent County, Delaware268 (±179)

Sources

  • American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024. https://api.census.gov/data/2024/acs/acs5
  • Published by Olympus on Oct 22, 2026.
  • Source data: U.S. Census Bureau. Works of the U.S. government are not subject to copyright in the United States.
  • This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Get this data from the API

The same figures, with provenance on every value, from the API (free API key, reference).

curl
curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/geographies?type=county&state=DE" -H "X-API-Key: $OLYMPUS_API_KEY"

curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/geographies?type=zcta&state=DE" -H "X-API-Key: $OLYMPUS_API_KEY"

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