Municipalities in Croatia (Croatian: općina; plural: općine) are the second-lowest administrative unit of government in the country, and along with cities and towns (grad, plural: gradovi) they form the second level of administrative subdisivion, after counties. Each municipality consists of one or more settlements (naselja) , which are the third-level spatial units of Croatia.^[1][2][3]

Though equal in powers and administrative bodies, municipalities and towns differ in that municipalities are usually more likely to consist of a collection of villages in rural or suburban areas, whereas towns are more likely to cover urbanised areas. Croatian law defines municipalities as local self-government units which are established, in an area where several inhabited settlements represent a natural, economic and social entity, related to one other by the common interests of the area's population.^[4]

As of 2023, the 21 counties of Croatia are subdivided into 128 towns and 428 municipalities, which in turn are subdivided into 6757 settlements.^[5][6][1]

Municipalities, within their self-governing scope of activities, perform the tasks of local significance, which directly fulfil the citizens’ needs, and which were not assigned to the state bodies by the constitution or law, and in particular affairs related to the organization of localities and housing, zoning and planning, public utilities, child care, social welfare, primary health services, education and primary schools, culture, physical education and sports, customer protection, protection and improvement of the environment, fire protection and civil defence, and local transport.^[4][7]

As of 2015^[update], there are 428 municipalities in Croatia.^[9]

• Administrative divisions of Croatia
• List of cities and towns in Croatia
• Association of Municipalities of the Republic of Croatia
• Joint Council of Municipalities
• Cadastral community