Which two non us areas both share a border with california?

Mexico and the Pacific Ocean are the two non US areas that both share a border with California.

California is a western coastal state of the United States of America which has Sacramento as its capital. California is bordered by Mexico (non US) to the south, the Pacific Ocean (non US) to the west, Nevada to the east and northeast and Oregon to the north. Geographically, California is divided into two regions; Southern California and Northern California.