National Register of Historic Places listings in Baltimore County, Maryland

This is a list of the National Register of Historic Places listings in Baltimore County, Maryland.

This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Baltimore County, Maryland, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.

There are 87 properties and districts listed on the National Register in the county, including 2 National Historic Landmarks. As an independent city, the city of Baltimore is entirely separate from Baltimore County; its National Register-listed properties and districts are listed separately.