Public ArcGIS MapServer endpoint for Island County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
This page is the endpoint reference. If you came here to find a specific property, the Island County parcel search runs this same layer in your browser, no account and no API key.
Search Island County parcelsHave a street address but not the parcel number? Find the parcel number by address.
https://maps.islandcountywa.gov/arcgis/rest/services/Geocortex/Base/MapServer/0Field by field, whether any endpoint we index for Island County answers it, and the evidence for each. We only call a field restricted when there is a stated reason we can cite. Everything else here is a fact about the services we index, not a claim about the law.
| Field | Status | Basis |
|---|---|---|
| APN | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Owner name | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Owner mailing address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Site address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Geometry | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Land use | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Zoning | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
taxpayerOwner Name (Taxpayer)ParcelNoParcel IDphysical_addrSite Addressphysical_addr_citySite Citymailing_addr1Owner Mailing Address Line 1mailing_addr_cityOwner Mailing Citycurl -s 'https://maps.islandcountywa.gov/arcgis/rest/services/Geocortex/Base/MapServer/0/query?where=UPPER(taxpayer)%20LIKE%20'SMITH%25'&outFields=ParcelNo,taxpayer,physical_addr,mailing_addr1&returnGeometry=false&resultRecordCount=10&f=json'
https://maps.islandcountywa.gov/arcgis/rest/services/Geocortex/Base/MapServer/0/query?where=UPPER(taxpayer) LIKE 'SMITH%'&outFields=ParcelNo,taxpayer,physical_addr,mailing_addr1&returnGeometry=false&resultRecordCount=10&f=jsonOpen this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| taxpayer | Owner Name (Taxpayer) | YES |
| ParcelNo | Parcel ID | YES |
| physical_addr | Site Address | YES |
| physical_addr_city | Site City | YES |
| physical_addr_zip | Site ZIP | NO |
| mailing_addr1 | Owner Mailing Address Line 1 | YES |
| mailing_addr2 | Owner Mailing Address Line 2 | NO |
| mailing_addr_city | Owner Mailing City | YES |
| mailing_addr_state | Owner Mailing State | NO |
| mailing_addr_zip | Owner Mailing ZIP | NO |
| property_land_use_code | Land Use Code | NO |
| legal_acreage | Legal Acreage | NO |
Island County, Washington (county seat Coupeville) serves its parcels from the Assessor's own ArcGIS Server, joined to the PACS assessor data and exported nightly per the service description. The owner field is called taxpayer, the parcel id ParcelNo (for example R03213-384-4950), the site address physical_addr with its city, state and ZIP parts, and the owner mailing address mailing_addr1 to mailing_addr3 with city, state and ZIP. ParcelNo and taxpayer values carry trailing spaces, so trim on display, and some parcels (vacant land) have a blank physical_addr. Named outFields are accepted. CORS reflects the request Origin and sends Access-Control-Allow-Credentials true, so it is not a wildcard. maxRecordCount is 60000. The layer's copyright text reads DO NOT USE AS LEGAL DOCUMENT and no license is stated. Two sibling services carry the same data and serve as fallbacks: SmartGov/Parcels MapServer and Auditor/BaseMap MapServer layer 0. The contact URL is the county map server root, which answered HTTP 200 on 2026-10-03; no separate Assessor contact page was retrieved. Verified live 2026-10-03: owner SMITH returned rows (first owner SMITH, COLIN, R13334-372-1430).
Island County Assessor / GIS, https://maps.islandcountywa.gov
Island County's Parcels layer exposes a parcel identifier (Parcel ID), owner names (Owner Name (Taxpayer), Owner Mailing Address Line 1, Owner Mailing City), and address fields (Site Address, Site City). Use it for owner-name lookups and address-based parcel searches. 6 of 12 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS MapServer layer, which supports query operations but not write operations; last verified 2026-10-03.
/query?where=…&outFields=*&f=jsonto the URL. The sample query above is a working example you can paste into a browser tab to see the raw JSON response.Counties publish parcel data through their own ArcGIS Server installations, each with its own schema. One county uses APN, another uses PIN, a third uses PARCEL_ID. Some expose owner names; others keep them on a separate assessor's portal. The searchable fields list above reflects what Island County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
maps.islandcountywa.gov serves Island County, Washington parcels over public ArcGIS REST, but, like most county servers, it may not send the CORS headers a browser needs for a cross-origin fetch. If a direct browser call fails, the layer still works from curl, Postman, or a server-side script; the UrbanKit parcel lookup tool proxies the request, so a search that succeeds there confirms the layer is genuinely public.
We last verified Island County's MapServer layer on 2026-10-03. County GIS teams move services without notice, so if you hit a fresh 404, tell us and we'll re-check. Atlas entries are re-verified on a rolling basis.
Island County's layer is hosted by the county on maps.islandcountywa.gov. Public ArcGIS endpoints rarely rate-limit individual reads, but maps.islandcountywa.gov can throttle heavy automated traffic at the host level. Page through results with resultOffset / resultRecordCount and request only the fields you need. There's no API key and no charge from the county.