It is bordered by the commune of Los Ángeles to the north, Renaico to the south, Mulchén to the east and Nacimiento to the west.

[4] According to the 2002 census of the National Statistics Institute, Negrete spans an area of 156.5 km2 (60 sq mi) and has 8,579 inhabitants (4,414 men and 4,165 women).

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

[1][2] Within the electoral divisions of Chile, Negrete is represented in the Chamber of Deputies by Joel Rosales Guzmán (UDI) and José Pérez Arriagada (PRSD) as part of the 47th electoral district, together with Los Ángeles, Tucapel, Antuco, Quilleco, Santa Bárbara, Quilaco, Mulchén, Nacimiento, San Rosendo, Laja and Alto Bío Bío.

The commune is represented in the Senate by Victor Pérez Varela (UDI) and Mariano Ruiz-Esquide Jara (PDC) as part of the 13th senatorial constituency (Bío Bío-Coast).