The home rule definition in American law is a legal framework that gives cities and counties the authority to govern their own affairs without needing the state legislature to sign off on every action they take. A home rule government can write its own ordinances, design its own structure, and manage local services on its own terms, within limits the state can still set. Nearly every state grants some form of home rule, but the scope of that authority, and how well it holds up against state interference, varies widely.1Home rule is a legal framework that gives cities and counties the authority to govern their own affairs without needing the state legislature to approve every action they take.
Why Home Rule Exists
The default rule in American law cuts the other way. Local governments have no inherent power. They are creations of the state, and they possess only the authority the state explicitly hands them. This principle is called Dillon’s Rule, named after Iowa Judge John F. Dillon, who articulated it in 1868.
Under Dillon’s Rule, a city has three categories of power: those granted in express words by the state, those necessarily implied from those express grants, and those truly indispensable to carrying out the city’s stated purposes. If any reasonable doubt exists about whether a power has been conferred, the doubt is resolved against the city. In practice, a municipality operating under strict Dillon’s Rule cannot regulate a new problem, impose a new fee, or restructure its own government without first getting permission from the state legislature.
Roughly 39 states still apply Dillon’s Rule in some form, with about 31 of those applying it to all municipalities and the rest applying it selectively. Only around 10 states have fully moved away from it. Home rule was the corrective. Instead of forcing cities to go to the state capitol for every new initiative, home rule flips the presumption: the local government can act unless the state has specifically said it cannot.
How States Grant Home Rule
The legal foundation for home rule comes in two forms, and the difference determines how easily the state legislature can take that authority back.
Constitutional home rule is embedded directly in a state’s constitution. More than 30 states include home rule provisions in their constitutions, often in articles dedicated to local government or local finance. Because amending a constitution requires a statewide vote rather than a simple legislative majority, constitutional home rule is harder for legislators to undermine. The legislature cannot casually strip a city’s authority through an ordinary bill when that authority is constitutionally guaranteed.
Statutory home rule, by contrast, exists because a state legislature passed a law granting local governments the right to manage their own affairs. About eight states rely on this approach. The protection is real but thinner: what the legislature grants, the legislature can take away with a later vote. Cities operating under statutory home rule are more exposed to political shifts at the state level.
A handful of states offer neither form. Alabama, Delaware, Indiana, Kentucky, Mississippi, Nevada, North Carolina, Vermont, and Virginia have constitutions that do not directly delegate broad governing power to local governments, leaving the scope of local authority almost entirely to legislative discretion.
The Two Models: Imperio and Legislative Home Rule
Even among home rule states, the design varies. Most follow one of two models that legal scholars have debated for over a century.
Imperio Home Rule
The older model, dating to the late 1800s, is called imperio home rule, from a Latin phrase meaning “a government within a government.” The state constitution empowers cities to adopt charters and then grants them control over “local” or “municipal” affairs. The defining feature is a constitutional shield: the legislature is barred from interfering in matters deemed local. St. Louis was the first city to operate under this model.
The catch is that courts must constantly draw the line between what counts as a “local” matter and what counts as a matter of “statewide concern.” That line has proven hard to hold. A city’s minimum wage ordinance might look local until a court decides that wage policy affects the entire state economy. This ambiguity is the main weakness of the imperio model, and it has produced decades of inconsistent court decisions.
Legislative Home Rule
The newer model, often called legislative home rule or the AMA model after the American Municipal Association that promoted it, takes a different approach. Instead of carving out a protected sphere of local matters, it delegates the full range of state legislative power to local governments. Cities can act on anything the state can act on, unless the legislature has specifically preempted the subject.
The trade-off is that the state retains broad authority to override local decisions through general laws. There is no constitutional shield against state interference. The theory is that cities gain more initiative power upfront while accepting that the state can always step in later. Home rule states are roughly split between the two models, and many have muddled the distinction through years of judicial interpretation.
What Home Rule Governments Can Do
The practical effect of home rule is that a city or county can act on local problems without waiting for the state legislature to convene and pass an enabling law. Specific powers vary by state and charter, but home rule governments commonly exercise authority over:
- Government structure, including creating or dissolving departments, setting council size, and defining how officials are selected, paid, and removed.
- Zoning and land use, including how property can be developed, where commercial and residential areas sit, and what building codes apply.
- Local taxation, including property taxes, local sales taxes, and various fees. Many states allow home rule cities to impose local sales tax surcharges, though the permissible rates differ widely.
- Public safety, including funding and managing police, fire, and emergency services.
- Licensing and regulation, including business licenses, local health and safety standards, and rules for activities within city limits.
- Elections and ethics, including municipal election procedures and ethics rules for local officials.
- Environment and welfare, including ordinances to protect the local environment, public welfare, and property.
Counties can also exercise home rule in many states, though their authority is often more constrained than what cities enjoy. Home rule counties typically must continue providing all mandatory county functions required by state law, such as maintaining jails, managing public health services, and overseeing transportation infrastructure, on top of whatever additional powers the charter grants. County election authority under home rule is often limited to procedures for ballot measures and recall elections rather than the broader election management powers available to cities.
How a City Adopts Home Rule
A city exercises its home rule authority through a municipal charter, which functions as a local constitution. The charter establishes the structure of local government, defines the powers of elected officials, and sets the rules for how the city operates. Moving from a general law city, one governed entirely by state statutes, to a charter city is a significant undertaking with a defined process.
The typical steps vary by state, but usually include:
- A petition, in which residents collect signatures from a specified percentage of registered voters. In some states, the threshold is 15 percent of registered voters from the last statewide election.
- A charter commission election, in which voters decide whether to proceed and simultaneously elect a commission of local residents who serve without party designation.
- Drafting and public hearings, over a period that can stretch from several months to more than a year, followed by a preliminary report for community review.
- Voter approval, in which a majority must approve the final charter before it takes effect, replacing the general state laws that previously governed the city’s structure.
Once adopted, the charter supersedes many state statutes on matters of local governance. It can be amended later, though most states require any amendments to go back to the voters.
Where Local Power Ends: State Preemption
Home rule does not make a city sovereign. Every home rule government remains a political subdivision of its state, and state law can override local ordinances through a doctrine called preemption. Preemption takes three forms:
- Express preemption, where a state statute explicitly says local governments may not regulate a subject. Firearms laws are the most common example. Roughly 46 states now expressly preempt local firearms regulation.
- Field preemption, where a court finds the legislature has so thoroughly regulated a subject that no room remains for local rules. If the state has “occupied the field,” local ordinances on that topic are invalid even without a direct conflict.
- Conflict preemption, where a local ordinance directly contradicts a state statute. If the ordinance permits what the state forbids, or forbids what the state expressly permits, the local rule falls. Courts have held that an ordinance merely adding requirements beyond what the state mandates is not automatically in conflict.
Most disputes in this area turn on whether a particular issue is truly local or whether it implicates statewide interests that justify preemption. That question rarely has a clean answer, and courts have reached different conclusions on similar facts. Over the past five years, a majority of states have expanded the subjects they preempt, with the average state preempting three subject areas in 2019 and four by 2024.
Punitive Preemption
Traditional preemption nullifies the conflicting local law. A newer and more aggressive strain goes further by punishing the cities or officials who tried to pass the law in the first place. Scholars call this “punitive preemption.”
Consequences can include loss of state funding, exposure to civil lawsuits from private parties, and personal penalties for local officials. Some states authorize civil and criminal penalties against officials who propose or implement preempted ordinances, including removal from office. Others have created mechanisms where a single state legislator can trigger an investigation, with the state treasurer required to withhold shared revenue if the locality does not back down within a set period. The effect is to raise the personal cost of testing the boundaries of local authority, which shapes what a home rule city will attempt regardless of what its charter formally allows.