Linthicum is a census-designated place (CDP) and unincorporated community in Anne Arundel County, Maryland, United States.

[2] It is located directly north of Baltimore–Washington International Thurgood Marshall Airport (BWI).

The community's name was from the area's primary land-owning family since an 1801 purchase by Abner Linthicum.

It extends from the Patapsco River in the north (the Baltimore County line) to Maryland Route 170 (Aviation Boulevard) in the south, and from Interstate 195 in the west to Maryland Route 648 (Baltimore Annapolis Boulevard) in the east.

The business district is home to numerous companies, offices, and commercial services.

19.5% of all households were made up of individuals, and 10.5% had someone living alone who was 65 years of age or older.

Ciena and Northrop Grumman Electronic Systems are among the companies based in Linthicum.