Southside Place is a city in west central Harris County, Texas, United States. The population was 1,546 at the 2000 census. As of 2000, Southside Place is the 13th wealthiest location in Texas by per capita income. Southside Place functions as a bedroom community for middle and upper-middle class families. Many businesses are located in Southside Place; all are along Bellaire Boulevard. The United States Postal Service uses "Houston" for all Southside Place addresses; "Southside Place, TX" is not an acceptable postal city name for mail addressed to locations in the city .