The Historical Museum of Yerbas Buenas is housed in a preserved, colonial building that is not only one of the oldest surviving in the town and province but also a silent witness of the dawn of Chile's independence.

Colonel Juan de Dios Puga, commander of the patriot force, was killed in the battle as was one third of his army.

As a commune, Yerbas Buenas is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years.

The 2024-2028 Mayor is Jonathan Norambuena (IND).The municipal council has the following members:[1][2] Within the electoral divisions of Chile, Yerbas Buenas is represented in the Chamber of Deputies by Jorge Tarud (PDC) and Romilio Gutiérrez (UDI) as part of the 39th electoral district, together with Linares, Colbún, San Javier and Villa Alegre.

The commune is represented in the Senate by Hernán Larraín (UDI) and Ximena Rincón González (PDC) as part of the 11th senatorial constituency (Maule-South).