Isla del Laja
[file:Mapa_río_Biobío.png|thumb|250px|The area corresponding to Isla del Laja stretches from the Bío Bío river (dark blue) and the Laja river (the northernmost shown watercourse that originates from the Andes).]
Isla del Laja is an old name for a strip of land in Central Chile, located between the Laja River in the north and the Bío Bío River in the south. Prior to 1791 Isla del Laja was also a corregimiento, an administrative division of Colonial Chile.