FREDERICK, a post-town of Maryland, and capital of the county of Frederick, North America. It is pleasantly situated on Carrol's Creek, a branch of the Monocacy. The town is regularly laid out and well built, and contains a court-house, a jail, a bank, a market-house, an academy, and seven places of public worship. Frederick enjoys an extensive trade with the surrounding country, and transports great quantities of wheat and flour to Baltimore. It is distant forty-four miles north-north-west of Washington, and forty-five west of Baltimore. The population in 1830 amounted to 4427.