The state of Maryland is divided into 23 counties. Saint Mary’s County is the oldest (founded in 1637), while Garrett County is the youngest (established in 1872).

Montgomery County is the most populous, with a population of 1,004,709 people. Worcester County (1,800 km2) has the largest land area, whereas Baltimore City has the smallest (238 km2).

Please find a list of all Maryland counties listed alphabetically below.

• Allegany County, MD
• Anne Arunde County, MD
• Baltimore County, MD
• Calvert County, MD
• Caroline County, MD
• Carroll County, MD
• Cecil County, MD
• Charles County, MD
• Dorchester County, MD
• Fredrick County, MD
• Garrett County, MD
• Hartford County, MD
• Howard County, MD
• Kent County, MD
• Montgomery County, MD
• Prince Georges County, MD
• Queen Annes County, MD
• Saint Marys County, MD
• Somerset County, MD
• Talbot County, MD
• Washington County, MD
• Wicomico County, MD
• Worcester County, MD