Gray is a census-designated place in Washington County, Tennessee, United States and a suburb of Johnson City. It is part of the Johnson City Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the "Tri-Cities" region. The population was 1,222 at the 201…Gray is a census-designated place in Washington County, Tennessee, United States and a suburb of Johnson City. It is part of the Johnson City Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the "Tri-Cities" region. The population was 1,222 at the 2010 census.