Springfield is a city in Bay County, Florida, United States, east of Panama City. It is part of the Panama City–Panama City Beach, Florida Metro…Springfield is a city in Bay County, Florida, United States, east of Panama City. It is part of the Panama City–Panama City Beach, Florida Metropolitan Statistical Area. Springfield was incorporated on February 12, 1935. The population was 8,075 at the 2020 census, down from 8,903 at the 2010 census.