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. Numerous businesses are located in the business district of Eastlake, including; 1st Street Saloon, Appletree Dental of Eastlake, Carlson Associates, Colorado Eye Center Optometry, Eastlake Barber Shop, Eastlake Montessori School, Impact Printing, Lake Avenue Inn, Papa Mazzotti's Italian Restaurant, Lisa Anne's Cookies and Gift Shoppe, and St. Andrew's Electric.