Lugo is the capital of the province of Lugo. The municipality had a population of 98,560 in 2014, which makes it the fourth most populous city in Galicia.

Lugo is the only city in the world to be surrounded by completely intact Roman walls, which reach a height of 10 to 15 metres (33 to 49 feet) along a 2,117-metre (6,946 ft.) circuit ringed with 71 towers. The walk along the top is continuous round the circuit, and features ten gates. These 3rd century walls are protected by UNESCO as a World Heritage Site. The bridge over the Min ho is essentially of Roman date, though many repairs over the centuries have effaced its Roman character.