Harris County administrative offices are located at 201 Caroline Street, Houston, TX 77002; phone: 713-755-6411.
The county was founded in 1836 under the name Harrisburg County. The name was changed to Harris County in 1838. When created the county encompassed the territory of the old municipality of Harrisburg plus Galveston Island.
The county is named from John Richardson Harris [1790-1829], an early settler and founder of the town of Harrisburg. Harris was born in Cayuga, New York.