Courtney Vandersloot (born February 8, 1989) is an American professional basketball player for the Chicago Sky of the Women's National Basketball Association (WNBA). She is a five-time WNBA All-Star and two-time WNBA champion. She has also played for UMMC Ekaterinburg in the Russian Premier League, Mist BC in Unrivaled, and teams in several other professional leagues.

Vandersloot played college basketball for the Gonzaga Bulldogs, holding numerous records and becoming the first player to have her number retired by the program. She was the only West Coast Conference women's player to be named Player of the Year and tournament MVP three times. In her final season, she led the Bulldogs to their first-ever Elite Eight appearance, and won the Frances Pomeroy Naismith Award and Nancy Lieberman Award. She is the first Division I player to record 2,000 points and 1,000 assists in a career.

She was drafted by the Sky with the third pick in the 2011 WNBA draft. She was named an All-Star and to the All-Rookie Team in her rookie year, and was named an All-Star again in 2019, 2021, 2022, and 2023. She led the Sky to their first WNBA championship in 2021. In 2023, she signed with the New York Liberty and helped the team win their first championship in 2024. In 2025, she returned to the Sky.

Playing the point guard position, Vandersloot ranks second in WNBA regular-season total assists (behind Sue Bird) and first in total playoff assists. She led the WNBA in assists in 2014, 2017–2021, and 2023. She holds the all-time WNBA records for assists-per-game in a season (10.0) and a career (6.6). She also holds several Sky franchise records, including the most games played, most assists, and most steals.