Русско-англо-русский юридический словарь

An electoral district (also known as a constituency, riding, ward, division, electoral area or electorate) is a distinct territorial subdivision for holding a separate election for one or more seats in a legislative body. Generally, only voters who reside within the geographical bounds of an electoral district (constituents) are permitted to vote in an election held there. (Wikipedia)

An electoral district (also known as a constituency) is a whole or a part of a state’s territory or a territorial subdivision, in which voters choose their representatives in elections for specified posts (eg president) or in order to act in specified functions (eg to represent a given group—parliamentary or local elections). (Oxford Constitutional Law)

In Australia, Canada, New Zealand, Sri Lanka, South Africa, the United Kingdom, and the United States, wards are an electoral district, within a district or municipality, used in local government elections. (Wikipedia)

Electoral districts for municipal or other local bodies are called "wards". (Wikipedia)