Eastlake is an unincorporated community and a U.S. Post Office in Adams County, Colorado, United States.

The Eastlake Post Office has the ZIP Code 80614.

[2] Most of the Eastlake area has been annexed by the City of Thornton.

A post office called Eastlake has been in operation since 1912.

[3] The community takes its name from nearby East Lake.