Puerto Rico does not have counties. The island is divided into 78 municipalities (municipios), and those municipalities are the only layer of local government between residents and the central territorial administration in San Juan. So the honest answer to whether Puerto Rico has counties or municipalities is: municipalities only, and they do the work counties do elsewhere.
The structure traces back to centuries of Spanish colonial rule, which built a centralized model that stayed in place after Puerto Rico became a U.S. territory in 1898. Federal agencies treat the 78 municipalities as county equivalents for statistics and funding, but they are not counties and do not behave like them day to day.
The 78 Municipalities
Every square mile of Puerto Rico falls inside one of the 78 municipalities, each with its own local government.1Library of Congress. The Commonwealth of Puerto Rico and Its Municipal Government Structure Two of them, Vieques and Culebra, sit on separate offshore islands rather than on the main island.
On the mainland, you might live in a city that sits inside a county that sits inside a state. In Puerto Rico, you live in a municipality, and that municipality handles everything a city and a county would handle combined. There is no intermediate layer. For permits, local public records, sanitation, and local infrastructure, the municipal government is the office you deal with.
Barrios Inside Each Municipality
Each municipality is further divided into smaller units called barrios, which function as neighborhoods or districts for administrative and census purposes. Barrios have no independent government, no taxing authority, and no elected officials of their own. They organize land use and give residents a sense of local identity within the larger municipality.
Every municipality contains a designated barrio-pueblo, the traditional urban center. The barrio-pueblo typically holds the city hall, the main public plaza, and the central parish church, a layout inherited from Spanish colonial town planning where civic and religious life radiated out from a central square. The surrounding barrios tend to be more residential or agricultural, though patterns vary by municipality.
What a Municipality Actually Runs
This is where Puerto Rico’s system splits most clearly from the mainland. Counties in the states usually run public schools, operate jails, maintain major roads, and sometimes manage local hospitals. In Puerto Rico, the central government handles all of that. Policing, prisons, public schools, utilities, ports, airports, roads, public transportation, and healthcare are funded and operated at the territorial level.2FOMB. Rethinking Government, a New Commonwealth-Muni Partnership
The Puerto Rico Police Bureau, for example, has jurisdiction across all 78 municipalities. Some municipalities keep their own smaller police forces, but the territorial agency handles the bulk of criminal and traffic enforcement islandwide. Education works the same way: the Puerto Rico Department of Education runs the public school system centrally rather than through local school districts.
Property taxes work differently too. On the mainland, counties typically assess and collect them. In Puerto Rico, the Municipal Revenue Collection Center (CRIM) handles assessment and collection centrally, then distributes the revenue back to municipalities.3FOMB. The CRIM Fiscal Plan – A Road Map to a Fair Property Tax System Property taxes are the single most significant revenue source for municipal budgets.
Municipalities are governed by an elected mayor (alcalde) and a municipal legislature, and they operate under the Código Municipal de Puerto Rico, Ley 107-2020, which replaced the earlier Ley de Municipios Autónomos.4Oficina de Gerencia y Presupuesto de Puerto Rico. Ley 107-2020 – Codigo Municipal de Puerto Rico The code gives municipalities real authority over local ordinances, zoning, and local commerce, with penalties for violations. It does not give them power over the centralized services listed above.
County Equivalents for Federal Purposes
You will still see the word “county” when Puerto Rico comes up in federal contexts, and that can be confusing. The U.S. Census Bureau classifies municipios as the primary divisions of Puerto Rico and treats them as county equivalents for all statistical purposes.5U.S. Census Bureau. Terms and Definitions This lets federal agencies compare Puerto Rico to the 50 states on demographics, economic conditions, and poverty rates using one framework.
Each municipality gets a three-digit FIPS county code, which combines with Puerto Rico’s two-digit state code to form the five-digit identifier used across federal databases.6U.S. Census Bureau. Counties and Statistically Equivalent Areas of the United States, Puerto Rico, and the Island Areas (2020) Federal agencies rely on those codes when calculating allocations for programs like community development block grants and disaster relief.
FEMA uses the same framework for disaster assistance. Its declarations for Puerto Rico list affected municipalities using the “county” designation it uses on the mainland, which keeps local governments eligible for public assistance grants to repair damaged facilities and fund emergency work.7FEMA.gov. Designated Areas The label is administrative. The underlying unit on the ground is still a municipality.