Seabrook is a city in Harris County in the US state of Texas. Some of the water surface area of Seabrook is located within the Chambers County. The population of Seabrook, was 11,952 according to the census conducted in 2010. The city's waterfront is home to several fish markets along with antique shops and bed-and-breakfast establishments, which can be found in the downtown area of the city. The city also has several miles of trails, which connect multiple parks within the city to each other.