Anamosa is a city in Jones County, Iowa. It is the county seat of Jones County.
Anamosa is part of the Cedar Rapids, Iowa Metropolitan Statistical Area, and its population at the 2000 census was 5,494.
The city is home to the Anamosa State Penitentiary, formerly known as the Iowa Men's Reformatory, a medium/maximum security prison that is the largest in Iowa, housing over 1,200 male inmates. It also has the National Motorcycle Museum.