Maryland County Map: All 24 Counties

In Maryland, public school districts are coterminous with county boundaries and funded directly through county property and local income tax piggyback levies. Montgomery, Prince George's, Baltimore, Anne Arundel, and Howard counties manage school budgets exceeding billions of dollars.

Under the Maryland Constitution of 1867 and the Home Rule Amendment of 1915, counties have three statutory structural options: Charter Home Rule (featuring an elected County Executive with administrative veto power and a legislative County Council), Code Home Rule (allowing County Commissioners to enact local ordinances without state legislative approval), or Commission form (relying on local legislative delegations in Annapolis).

This centralization makes Maryland county elections pivotal events for housing density, stormwater utilities, transit-oriented development, and environmental protection under the Chesapeake Bay Critical Area Act.

Western Maryland—comprising Garrett, Allegany, and Washington counties—straddles the Appalachian Plateau and Ridge-and-Valley province. Garrett County features Maryland's highest elevation at Hoye-Crest (3,360 ft) and drains west into the Ohio River basin via the Youghiogheny River.

The Central Piedmont and Capital region—Montgomery, Prince George's, Howard, Frederick, and Anne Arundel—contain over 65% of the state population, driven by federal agencies, Johns Hopkins University, the University of Maryland, and the Port of Baltimore.

Across the Chesapeake Bay Bridge, the nine Eastern Shore counties (Cecil, Kent, Queen Anne's, Talbot, Caroline, Dorchester, Wicomico, Somerset, Worcester) preserve deep poultry farming, seafood crabbing, and barrier island tourism economies centered on Ocean City.