Kathryn Jean Del Fava (born July 23, 1998) is an American professional soccer player who plays as a defender for the Utah Royals of the National Women's Soccer League (NWSL).

Del Fava made her professional debut in the 2020 NWSL Challenge Cup on June 30, 2020.

On October 16, 2022, Del Fava scored the winning goal in the 10th minute of overtime in a playoff match against the Houston Dash. It was the latest goal in NWSL history and the first goal of Del Fava's NWSL career.

On December 12, 2023, Utah Royals finalized a trade with the Kansas City Current that sent Del Fava and the 4th overall pick in the 2024 NWSL College Draft to Utah in exchange for expansion draft protection and $75,000 in allocation money for the Current.

In the away game against Bay FC, Del Fava scored in the 89th minute to make it 1–0. She played every minute of the 2024 season for the Royals, becoming an iron woman for the first time.

Del Fava is a native of Kenosha, Wisconsin, and attended St. Joseph Catholic Academy.