This API has been replaced by the new Area and Census Block API, updated to reduce response time and support additional Area related data elements. As such, this legacy API is being decommissioned.

Census Block Method Call

This API returns the US Census Bureau Census Block number (aka the 15 character FIPS Code) given a passed Latitude and Longitude. The API also returns the US State and County name associated with the Block.
API URL[latitude]&longitude=[longitude]&showall=[true/false][censusYear]/find?latitude=[latitude]&longitude=[longitude]&showall=[true/false]
Example Request
Parameter Type Description
latitude required double

Latitude of a location.

longitude required double

Longitude of a location.

censusYear optional integer

Returns results based on census year.

Valid values: 2000, 2009, 2010 (default)

format optional string

Format for the returned results.

Valid values: XML (default), JSON, JSONP

showall optional boolean

If the coordinate lies on the boundary of multiple geographies, for a complete list use showall=true.

Valid values: true, false