Garrison is a census-designated place (CDP) in Baltimore County, Maryland, United States, adjacent to Owings Mills.

[3] According to the United States Census Bureau, the CDP has a total area of 3.2 square miles (8.2 km2), of which 0.12% is water.

This was the second highest percentage of Russian Americans of any place in Maryland after Pikesville.

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.