East Renton Highlands is a census-designated place (CDP) in King County, Washington, United States, located between Issaquah and Renton. The population was 11,140 at the 2010 census. East Renton Highlands is part of the potential annexation area (PAA) of Renton, but in February 2007 voters defeated a 1,475-acre (5.97 km2) annexation proposal 3 to 1. In January 2008, the Renton City Council accepted a petition, using the 60% Direct Method, for the proposed Liberty Annexation; 193 acres (0.78 km2) located in the vicinity of 156th Ave. SE, SE 144th St., and SE 134th St.