In big cities such as São Paulo and Rio de Janeiro districts can host a sub-prefecture (or sub-city hall).
Municipal districts in Brazil succeed the old Portuguese parishes from the Brazilian colonial administration.
[3] The City of Flin Flon in Manitoba also held a municipal district status between 1933 and 1946.
The system of municipal districts came into operation from 1 June 2014 following local elections in May, at the same time as the abolition of town and borough councils.
In the United States, the District of Columbia is divided into two municipal districts, based on the city's wards, solely for the purposes of electing delegates in the Democratic Party's presidential primaries to the Democratic National Convention.