Shrewsbury is an inner-ring suburb of St. Louis, located in St. Louis County, Missouri, United States. The population was 6,254 at the 20…Shrewsbury is an inner-ring suburb of St. Louis, located in St. Louis County, Missouri, United States. The population was 6,254 at the 2010 census. Shrewsbury was officially platted in 1889. The land which became Shrewsbury originally belonged to Gregorie Sarpy and Charles Gratiot Sr.; by 1890, it was divided into farms and sold to families. The area now known as Shrewsbury was a 278-acre farm owned by General John Murdoch. The Murdoch farm was called Shrewsbury Park, named after a town in England.