La Puente is a city in Los Angeles County, California, United States. The population was 39,816 at the 2010 census. The area was known for its fruit and Walnut groves during the 1930s. The city was even home to the World's largest walnut packing plant. Today, the city is heavily-urbanized, but the area still has some historical landmarks from its founding days nearby, for instance, the Workman and Temple Family Homestead Museum in neighboring City of Industry.