Heath is a city in Rockwall and Kaufman counties, Texas, United States. The population was 6,921 at the 2010 census, up from 4,149 at the 2…Heath is a city in Rockwall and Kaufman counties, Texas, United States. The population was 6,921 at the 2010 census, up from 4,149 at the 2000 census. It is part of the Dallas–Fort Worth metroplex. A proposition was placed on the November 4, 2008, ballot that, if passed, would have changed the name from "City of Heath" to "Village of Heath". Of the 3,511 votes cast, 2,069 voted against the measure while 1,442 voted in favor.