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US County Profile API

What it does

County Profile lets you fetch a county profile by 5-digit FIPS code. Send the county_fips path value and get a JSON response for that county back.

Use County Profile when you need a reliable lookup step in address intelligence, demographic enrichment, reporting, or internal admin tools. A single request is enough to resolve one county identifier into the profile payload exposed by the API.

The endpoint accepts one input: county_fips. The code must be a 5-digit county FIPS string such as 06037. The response includes the county profile, including the county FIPS code, county name, state name, population, demographic metrics, last updated timestamp, and attribution information.

This is a good fit for systems that store county codes and need to retrieve the associated profile on demand, rather than maintaining a local copy of reference data.

GET
County profile by FIPS
https://api.eu.apyhub.com/dosvak/county-profile/:county_fips

QUICKSTART

GUIDE

Quickstart

Fetch a county profile by providing the 5-digit county FIPS code in the path.

curl -X GET "https://api.eu.apyhub.com/dosvak/county-profile/:county_fips" \
  -H "apy-token: $APY_TOKEN"

What you'll get back

Returns a JSON object containing the county profile, including the county FIPS code, county name, state name, population, demographic metrics, last updated timestamp, and attribution information.

{
  "county_fips": "06037",
  "county_name": "Los Angeles County",
  "state_name": "California",
  "population": 9757179,
  "median_household_income": "80794",
  "poverty_rate": "13.1",
  "unemployment_rate": "5.4",
  "updated_at": "2026-07-27T23:40:59Z",
  "attribution": [
    {
      "source": "U.S. Census Bureau Population Estimates Program"
    }
  ]
}
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5-digit county FIPS code.

About this endpoint

What it does

Returns the county profile for a specified county FIPS code. The request identifies the county by its 5-digit FIPS value in the path.

Path Parameter(s)

AttributeTypeMandatoryDescription
county_fipsStringYes5-digit county FIPS code.

Response

Returns a JSON object containing the county profile.

FieldTypeDescription
county_fipsStringThe 5-digit FIPS code of the county.
county_nameStringThe name of the county.
state_nameStringThe name of the state containing the county.
populationNumberThe population of the county.
demographicsObjectDemographic metrics for the county.
last_updatedStringThe timestamp indicating when the county profile was last updated.
attributionStringAttribution information for the county data source.
▣ COMMON ERRORS

Errors any endpoint can return

400bad_request

Required parameter missing or malformed body.

401unauthorized

API key missing, revoked, or not authorized for this service.

429rate_limited

Your plan's per-second rate exceeded. Retry with exponential backoff.

503upstream_busy

Backend temporarily unavailable. Try again in a few seconds.

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From the blog

Reads that touch this API.

Ultimate Guide to Country Codes: What They Are and How to Use ThemJul 9, 2026HTTP Status Codes: A Developer's Cheat Sheet (With Fixes for the Common Errors)Aug 5, 2026How to Use cURL HEAD Requests: A Developer’s GuideSep 10, 2026What Is a Payload? Understanding API Payloads, Query Parameters, and API Tokens Sep 10, 2026