||Origin: Carroll County was formed in 1837 from Baltimore and Frederick Counties (Chapter 256, Acts of 1835; confirmed by Chapter 19, Acts of 1836, which was passed January 19, 1837). The County was named for Charles Carroll of Carrollton (1737-1832), Revolutionary War statesman and a Maryland signer of Declaration of Independence.
County Seat: Westminster , MD 21157
Form of Government: County Commissioners
1990 census: 123,372
2000 census: 150,987