Baltimore County is situated in the geographic center of the Maryland State and surrounds the City of Baltimore almost completely. Within its 612 square miles (plus an additional 28 square miles of water) are situated at least 29 identifiable unincorporated communities which range in population from approximately 5,000 to 63,000. As of 2003 census, there are 754,292 people, 299,877 households, and 198,518 families residing in the county. The County's seat of government is located in Towson. Today, the County maintains the third highest population and the largest land area of any political subdivision in the State of Maryland. The County runs from sea level to 966 feet (primarily ranges from 200 to 700 feet) and almost 54% of Baltimore County is forested

It should be noted that Baltimore County does not include the City of Baltimore. This county is a part of the Washington-Baltimore Metropolitan Area.

Baltimore Cities and towns include:Arbutus, Carney, Catonsville, Cockeysville, Dundalk, Edgemere, Essex, Garrison , Hampton , Kingsville , Lansdowne-Baltimore Highlands , Lutherville-Timonium , Mays Chapel , Middle River, Milford Mill , Overlea , Owings Mills , Parkville , Perry Hall , Pikesville , Randallstown , Reisterstown , Rosedale , Rossville , Towson , White Marsh , and Woodlawn

Baltimore county Neighboring areas include York County, Harford County , Chesapeake Bay, Anne Arundel County, Baltimore city , Howard County , Carroll County