Estadio Municipal Guillermo Guzmán Díaz, Municipal football stadium in Rengo, Chile.

The Estadio Municipal Guillermo Guzmán Díaz is Rengo's main football ground, with a capacity of almost 3,000 seats. Its 2013 remodelling added an electronic scoreboard, a perimeter fence and an Olympic fence, plus a media booth area. The pitch is overlooked by stands whose ornamentation was also reworked that year.

The stadium opened in the 1960s. During the 1962 World Cup, Rengo served as the training and lodging base of the Hungarian national team, which trained at the Municipal Stadium. In 1996 the venue hosted the National Amateur Football Championship, won by the Rengo selection.

The stadium is named after Guillermo Guzmán Díaz, a local footballer who was called up to the national team in 1911 and founded the Asociación de Fútbol de Rengo on 15 August 1923. The name ties the ground to the city's own football institution rather than to a national figure.

The stadium underwent major renovation in 2013 with improved restrooms, upgraded bleachers, perimeter walls, and a new scoreboard. Visitors should plan travel time in advance and check match schedules beforehand.

The 1996 Campeonato Nacional de Fútbol Amateur was played at this ground, and the Rengo selection took the trophy. The title is the club's best-known result and is still recalled in the city.