what area is 77021
HoustonâThe WoodlandsâSugar Land is a nine-county metropolitan area defined by the Office of Management and Budget. It is located along the Gulf Coast region in the U.S. state of Texas. The metropolitan area is colloquially referred to as  Greater Houston  and is situated in Southeast Texas.n 2009, Milken Institute/Greenstreet Real Estate Partners ranked the then-named HoustonâSugar LandâBaytown MSA as the fifth-best performing metropolitan area; the Houston area had moved up 11 spaces from the previous year's ranking. It is a part of the Texas Triangle megapolitan area.