Algonquin is a census-designated place (CDP) in Dorchester County, Maryland, United States.

[3] The community was named for the Algonquin people, one of the Native American tribes in the East.

[4] It is bordered to the south and east by the city of Cambridge, the county seat.

The northern limit of the CDP is the center of the tidal Choptank River, an arm of Chesapeake Bay.

23.4% of all households were made up of individuals, and 15.1% had someone living alone who was 65 years of age or older.