Alexa Paige Knierim (née Scimeca; born June 10, 1991) is an American pair skater. With her skating partner, Brandon Frazier, she is the 2022 World champion, the 2023 World silver medalist, a 2022 Olympic gold medalist in the figure skating team event, the 2022 Grand Prix Final silver medalist, a two-time U.S. National champion (2021, 2023), and a three-time Grand Prix gold medalist.
With her husband and former skating partner, Chris Knierim, she is a 2018 Olympic bronze medalist in the figure skating team event, a two-time Four Continents medalist (2016 silver, 2014 bronze), a three-time Grand Prix medalist (1 silver, 2 bronze), and a three-time U.S. National champion (2015, 2018, 2020). At the 2018 Winter Olympics, the Knierims became the first American pair, and the second pair ever in history, to perform a quad twist at the Olympic Games.