Garrison is located at . According to the United States Census Bureau, the CDP has a total area of, of which 0.12% is water.
Demographics
As of the census of 2000, there were 7,969 people, 3,459 households, and 1,940 families residing in the CDP. The population density was 2,551.5 people per square mile. There were 3,696 housing units at an average density of 1,183.4/sq mi. The racial makeup of the CDP was 77.54% White, 17.09% African American, 0.13% Native American, 3.35% Asian, 0.01% Pacific Islander, 0.92% from other races, and 0.97% from two or more races. Hispanic or Latino of any race were 2.27% of the population. In 2000, 14% of Garrison residents identified as being of Russian American heritage. This was the second highest percentage of Russian Americans of any place in Maryland after Pikesville. The majority of them are of Jewish ancestry. 2% of Garrison's residents were of Ukrainian descent and 1% were descended from other Eastern European countries. 8% were German, 7% Polish, 5% Irish, 4% English, 3% Italian, 2% Lithuanian, and 2% French. There were 3,459 households out of which 25.7% had children under the age of 18 living with them, 42.0% were married couplesliving together, 10.8% had a female householder with no husband present, and 43.9% were non-families. 35.5% of all households were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.90. In the CDP, the population was spread out with 22.0% under the age of 18, 10.3% from 18 to 24, 34.4% from 25 to 44, 23.5% from 45 to 64, and 9.8% who were 65 years of age or older. The median agewas 34 years. For every 100 females, there were 98.3 males. For every 100 females age 18 and over, there were 94.9 males. The median income for a household in the CDP was $56,520, and the median income for a family was $62,171. Males had a median income of $45,286 versus $37,472 for females. The per capita income for the CDP was $36,236. About 4.6% of families and 5.8% of the population were below the poverty line, including 7.4% of those under age 18 and 9.3% of those age 65 or over.
