Selby-on-the-Bay (often just called Selby) is a census-designated place (CDP) in Anne Arundel County, Maryland, United States, for the 2000 census, at which time its population was 3,674.

As of the census[2] of 2000, there were 3,674 people, 1,398 households, and 1,034 families residing in the CDP.

There were 1,480 housing units at an average density of 459.0 per square mile (177.2/km2).

19.8% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.

most of the kids in the area go to central middle school aka didpees playground.