The 1973 Virginia Slims of Tucson, also known as the Virginia Slims Conquistadores of Tucson, was a women's tennis tournament played on outdoor hardcourts at the Tucson Racquet Club in Tucson, Arizona in the United States that was part of the Virginia Slims Circuit of the 1973 WTA Tour.

It was the second edition of the tournament and was held from March 26 through April 1, 1973.

Second-seeded Kerry Melville won the singles title and earned $6,000 first-prize money.

[1] Kerry Melville defeated Nancy Gunter 6–3, 6–3 Janet Newberry / Pam Teeguarden defeated Karen Krantzcke / Betty Stöve 3–6, 7–6, 7–5