ZIP Codes for a County
View all Redfin Property Data endpoints →Enumerate the ZIP codes inside a US county. Pass a county name and receive its ZIP list — the right granularity for county-level market scans, rural and suburban acquisition research, direct-mail targeting and statewide pipelines that must prove no ZIP was skipped.
API Features
County-scale coverage Full ZIP enumeration matches how assessors and county records are organized.
Rural research County fan-out reaches rural ZIPs that city-centric crawls miss.
Checklist building Returned lists double as no-skip coverage manifests.
Mail targeting ZIP lists feed direct-mail campaigns per county.
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GET
/api/project/redfin/get-zipcode-by-county API Response (JSON)
{} curl -X GET 'https://api.opendata-api.com/api/project/redfin/get-zipcode-by-county?key=<API_KEY>&county=<county>'
curl -X GET 'https://api.opendata-api.com/api/project/redfin/get-zipcode-by-county?key=<API_KEY>&county=<county>'
Query Result
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Use Cases
- Run county-level market scans for investors evaluating rural and suburban counties.
- Generate direct-mail targeting lists by enumerating every ZIP in a county.
- Build county coverage checklists so no ZIP is skipped in a statewide data pipeline.
- Compare county sub-markets by aggregating listing stats per ZIP.
Frequently asked questions
Does the county name need a state attached?
Pass the county name (e.g. Hampshire); many county names repeat across states, so confirm the target state and spot-check results.
How is county enumeration different from city enumeration?
County granularity is coarser and covers rural areas; city granularity suits metro-area tasks.