Lower Grand Lagoon is a census-designated place (CDP) in Bay County, Florida, United States.

[5] It is part of the Panama City–Panama City Beach, Florida Metropolitan Statistical Area.

[8] As of the census[3] of 2000, there were 4,082 people, 2,097 households, and 1,052 families residing in the CDP.

There were 5,697 housing units at an average density of 2,620.6 per square mile (1,011.8/km2).

37.3% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older.