Populated places in Estonia (officially: settlement units^[1]), are cities or settlement units of rural municipalities, but only cities have administrative functions. Settlement units are divided into settlements^[2] and urban regions^[3] (subdivisions of cities).

Officially there are four types of settlement units in Estonia:

• town/city (Estonian: linn)
• borough (Estonian: alev)
• small borough (Estonian: alevik)
• village (Estonian: küla)