The 2012 Mercury Insurance Open was a women's tennis tournament played on outdoor hard courts.

It was the 3rd edition of the Southern California Open since the tournament left the tour in 2007.

It took place in Carlsbad, California, United States from July 16 through July 22, 2012.

Second-seeded Dominika Cibulková won the singles title.

[1] The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received entry as lucky loser: The following pair received wildcard into the doubles main draw: