Maryland County Government Structure: Commissioners, Councils, and Executives

Maryland operates 23 counties plus Baltimore City — a jurisdiction that functions as a county equivalent — and no two of them govern themselves in exactly the same way. That structural diversity is not accidental. It reflects decades of constitutional evolution, local political culture, and the fundamental tension between state authority and home rule. This page examines how county governments are organized across Maryland, what distinguishes a charter county from a code county from a commissioner county, and why those distinctions produce meaningfully different outcomes for residents.

• Definition and scope
• Core mechanics or structure
• Causal relationships or drivers
• Classification boundaries
• Tradeoffs and tensions
• Common misconceptions
• Checklist or steps (non-advisory)
• Reference table or matrix

Definition and scope

Maryland's 23 counties and Baltimore City collectively serve more than 6.1 million residents (U.S. Census Bureau, 2020 Decennial Census), functioning as the primary delivery layer for property assessment, roads, public schools, zoning, and local law enforcement. Unlike municipalities — cities and towns that exist within county boundaries and carry their own charters — counties in Maryland cover their entire geographic territory continuously. There is no unincorporated no-man's land outside a county's reach.

The Maryland Constitution, Article XI-A through XI-F, establishes the framework within which counties may organize themselves. The state does not prescribe a single governing form; instead, it creates a menu of structural options and then largely steps back. What counties do with that menu is where things get interesting.

Scope and coverage: This page covers county-level government structures across Maryland's 23 counties and Baltimore City. It does not address municipal government structures — the organization of cities, towns, or special taxing districts within counties — which are covered separately at Maryland Municipal Government Structure. State agency operations, the General Assembly, and federal-county relationships fall outside this page's scope.

Core mechanics or structure

Maryland counties operate under one of three principal government forms, each rooted in different constitutional authority.

Commissioner counties represent the oldest form. A board of county commissioners — typically 3 or 5 elected members — holds both legislative and executive authority in a single body. The board enacts ordinances, adopts the budget, and administers county operations simultaneously. This fusion of powers is a deliberate historical design, not an oversight. Commissioner counties are governed under the Express Powers Act, Maryland Code, Article 25, which enumerates specifically what they may and may not do. If a power isn't listed, a commissioner county generally does not have it.

Code counties operate under Article 25B of the Maryland Code, which provides a somewhat broader grant of authority than the Express Powers Act without requiring a full charter. A code county may adopt a "code" that grants it additional home rule powers — essentially a middle tier between the tight constraints of commissioner government and the fuller autonomy of a charter county.

Charter counties operate under home rule authority granted by Article XI-A of the Maryland Constitution, adopted in 1915. A charter is essentially a local constitution. Charter counties may enact local legislation on any matter not preempted by state law without requiring explicit state authorization for each act. As of the Maryland Manual On-Line published by the Maryland State Archives, 9 of Maryland's 23 counties — plus Baltimore City — operate as charter jurisdictions.

Within charter counties, two sub-forms dominate:

• Council-Executive form: A separately elected county executive holds executive authority while an elected county council holds legislative authority. Montgomery County, Prince George's County, Baltimore County, and Howard County use this model.
• Council-Manager form (less common): An elected council appoints a professional county manager to handle day-to-day administration, similar to the city manager model in municipal government.

Causal relationships or drivers

The shift from commissioner government toward charter home rule accelerated significantly during the mid-20th century as suburban growth transformed Maryland's demographic map. Montgomery County, which now exceeds 1 million residents (U.S. Census Bureau, QuickFacts: Montgomery County), adopted its charter in 1948. At that population scale, the express-powers limitation of commissioner government would have become administratively paralytic — every new regulatory need would have required a trip to Annapolis for legislative authorization.

Smaller rural counties have faced the opposite pressure. In counties where the total population sits below 40,000 — Garrett County on the Western Maryland plateau, Kent County on the Eastern Shore — the overhead of a full charter government, with separate executive and legislative branches and the attendant administrative infrastructure, would consume a disproportionate share of county revenues. Commissioner government is lean by design.

State legislative action also shapes county structure. The Maryland General Assembly retains authority to preempt local legislation, and it exercises that authority regularly in areas like firearms regulation, minimum wage floors, and environmental standards. The degree of preemption a county faces is partly independent of its structural form — a charter county still cannot legislate in areas the General Assembly has occupied exclusively.

The Maryland Government Authority resource provides comprehensive coverage of how state-level governance interacts with county and municipal structures, including the constitutional provisions that define the boundaries of local authority and the mechanisms through which state agencies coordinate with county governments on everything from transportation funding to public health administration.

Classification boundaries

The three-tier classification — commissioner, code, charter — is not perfectly clean in practice. Several counties have adopted partial reforms that blur the edges.

A commissioner county may, for example, hire a professional county administrator to handle day-to-day management without formally converting to charter government. The administrator operates at the pleasure of the commissioners and holds no independently elected mandate. This is structurally distinct from a council-manager charter county, even if it produces similar operational results.

Baltimore City occupies a genuinely unique position. Under Article XI-A, Baltimore City functions as a charter jurisdiction, but it also holds independent constitutional status distinct from the 23 counties — a legacy of its separation from Baltimore County in 1851. The City's governing structure combines a strong mayor, a City Council of 15 members elected from 14 districts plus one at-large member (the Council President), and an array of independent boards and commissions. No other jurisdiction in Maryland replicates this configuration.

Anne Arundel County, home to the state capital Annapolis and one of Maryland's largest jurisdictions by population, operates as a charter county with a council-executive form — a distinction that carries real weight when the county enacts local legislation on zoning or tax rates without requiring state legislative action for each measure.

Tradeoffs and tensions

The structural diversity of Maryland county government is a genuine source of both strength and friction.

Home rule vs. state uniformity: Charter counties can enact local legislation rapidly and in response to local conditions. But when 9 charter jurisdictions each adopt different rules on, say, accessory dwelling units or short-term rentals, the result is a patchwork that complicates development, compliance, and regional planning. State agencies managing programs that run across county lines — the Maryland Department of Transportation coordinating transit corridors, for instance — must navigate 23 different local regulatory environments.

Accountability structures: The commissioner form concentrates power in a small elected board, which can produce efficient decision-making and clear lines of accountability in small communities. In larger jurisdictions, that same concentration can mean that legislative functions, budget oversight, and executive administration are all held by the same 3 to 5 people — a structure that progressives and government reform advocates have historically criticized as insufficiently checks-and-balanced.

The charter conversion question: Converting from commissioner to charter government requires a local referendum. Historically, these referenda have failed as often as they have succeeded. Carroll County, for example, has considered charter conversion debates at multiple points without converting. The argument against conversion often centers on cost and the perceived risk that a separately elected executive creates an independent power center that can pursue agendas at odds with the county council.

Common misconceptions

"Charter counties are more powerful than commissioner counties." Partially true but misleading. Charter counties have broader home rule authority — they can act without specific state authorization. But state preemption applies equally to all county forms. A charter county cannot override state law any more than a commissioner county can.

"Baltimore City is a county." It is a county equivalent for many purposes — judicial circuits, state funding formulas, census geography — but it is constitutionally distinct from all 23 counties and holds powers that no county possesses.

"The county executive runs the county the way a governor runs the state." In council-executive charter counties, the executive holds significant administrative authority, but the county charter typically vests legislative authority in the council. The executive cannot enact ordinances unilaterally. The analogy to a governor is structural shorthand, not a precise description of power.

"Commissioner counties are outdated." Commissioner government persists in 14 of Maryland's 23 counties because it is functionally appropriate for lower-population, lower-complexity jurisdictions — not because those counties haven't gotten around to modernizing. Worcester County, Talbot County, and Garrett County all operate effectively as commissioner counties.

Checklist or steps (non-advisory)

Elements present in a county government structure analysis:

• [ ] Identification of governing form: commissioner, code, or charter
• [ ] Number and selection method of governing board members (elected at-large, elected by district, appointed)
• [ ] Presence or absence of a separately elected county executive
• [ ] Presence or absence of a separately elected or appointed county manager/administrator
• [ ] Constitutional authority basis (Article XI-A, Article 25, Article 25B)
• [ ] Whether a local charter document exists and where it is published
• [ ] Enumeration of legislative vs. executive functions and which body holds each
• [ ] State preemption areas that limit local authority regardless of governing form
• [ ] Budget adoption process and which body holds final approval authority
• [ ] Term lengths and any term limit provisions in the charter or enabling statute

This checklist applies to all 23 counties and Baltimore City. For the home page overview of Maryland's governmental architecture, see the Maryland State Authority index.

Reference table or matrix

Sources: Maryland State Archives — Maryland Manual On-Line; individual county charter documents available through respective county government websites.

References

• Maryland State Archives — Maryland Manual On-Line: Charter Counties
• Maryland Constitution, Article XI-A (Home Rule)
• Maryland Code, Article 25 — Express Powers Act (Commissioner Counties)
• Maryland Code, Article 25B — Code Counties
• U.S. Census Bureau — QuickFacts: Montgomery County, Maryland
• U.S. Census Bureau — 2020 Decennial Census, Maryland
• Maryland State Archives — Maryland Manual On-Line: Counties Overview
• Maryland General Assembly — Annotated Code of Maryland