Bío Bío Province is one of four provinces of the Chilean region of Bío Bío (VIII). Its capital is Los Ángeles (2002 pop. 94,716). It is bounded on the north, west and south by the provinces of Concepción, Arauco and Malleco, respectively, and on the east by Argentina. It has an area of of well-wooded and mountainous country, and exports timber to a large extent. The population is 373,981 according to the census of 2012. The great trunk railway from Santiago south to Puerto Montt crosses the western part of the province and also connects it with the port of Concepción. Los Ángeles lies east of this railway and is connected with it by a branch line.