Lower Grand Lagoon is a census-designated place (CDP) in Bay County, Florida, United States. The population was 4,398 at the 2020 census, up from 3,881 at the 2010 census.^[5] It is part of the Panama City–Panama City Beach, Florida Metropolitan Statistical Area.

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Lower Grand Lagoon, Florida
Census-designated place
Interactive map outlining Lower Grand Lagoon
Coordinates: 30°9′3″N 85°45′41″W
Country	United States
State	Florida
County	Bay
Area [1]
• Total	2.68 sq mi (6.95 km2)
• Land	2.10 sq mi (5.44 km2)
• Water	0.58 sq mi (1.51 km2)
Elevation	10 ft (3 m)
Population  (2020)
• Total	4,398
• Density	2,094.29/sq mi (808.59/km2)
Time zone	UTC-6 (Central (CST))
• Summer (DST)	UTC-5 (CDT)
ZIP code	32408[2]
Area code	850
FIPS code	12-41562[3]
GNIS feature ID	1867171[4]

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Lower Grand Lagoon is located at 30°9′3″N 85°45′41″W (30.150784, -85.761490).^[6]

According to the United States Census Bureau, the CDP has a total area of 2.7 square miles (7.0 km²), of which 2.1 square miles (5.5 km²) is land and 0.58 square miles (1.5 km²), or 21.68%, is water.^[7]

As of the census^[3] of 2000, there were 4,082 people, 2,097 households, and 1,052 families residing in the CDP. The population density was 1,877.7 inhabitants per square mile (725.0/km²). There were 5,697 housing units at an average density of 2,620.6 per square mile (1,011.8/km²). The racial makeup of the CDP was 95.88% White, 1.18% African American, 0.59% Native American, 0.73% Asian, 0.07% Pacific Islander, 0.32% from other races, and 1.22% from two or more races. Hispanic or Latino of any race were 3.06% of the population.

There were 2,097 households, out of which 16.1% had children under the age of 18 living with them, 39.5% were married couples living together, 7.2% had a female householder with no husband present, and 49.8% were non-families. 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. The average household size was 1.95 and the average family size was 2.50.

In the CDP, the population was spread out, with 13.4% under the age of 18, 9.4% from 18 to 24, 33.6% from 25 to 44, 25.7% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 104.7 males. For every 100 females age 18 and over, there were 107.1 males.

The median income for a household in the CDP was $31,599, and the median income for a family was $38,650. Males had a median income of $27,648 versus $21,905 for females. The per capita income for the CDP was $20,433. About 13.3% of families and 16.3% of the population were below the poverty line, including 29.6% of those under age 18 and 6.8% of those age 65 or over.