Lugo B

Club Deportivo Lugo "B", previously Polvorín Fútbol Club and Sociedad Deportiva e Cultural Polvorín, is a Spanish football team based in Lugo, in the autonomous community of Galicia. Founded in 1991, it plays in Tercera Federación – Group 1, holding home matches at Campo Municipal de A Cheda with a capacity of 1,000 seats.

Founded in 1991 as Sociedad Deportiva y Cultural Polvorín, the club was created to honour CD Polvorín, a club from the city which played in two Tercera División seasons before merging with SG Lucense in 1953 to form CD Lugo. The club established some youth categories in 1992, before starting a senior team in 1993.

On 13 August 2015, Polvorín became the farm team of Lugo. In 2018, SDC Polvorín was renamed Polvorín Fútbol Club.

In July 2025, the club was fully incorporated into Lugo's structure, being renamed Lugo B and becoming their reserve team.