Coming off back-to-back All-American seasons, Allen entered her junior year looking to continue her strong effort, which resulted in a breakout season. Allen finished the year with 34 wins, which is tied for fourth-most in a season, and five top-five finishes. The junior standout posted a runner-up finish at the Emmanuel College Tournament, before placing fourth at the Missouri Valley Open. Allen recorded her first career tournament win on December 5, 2015, when she won the NAIA Invitational. Later that year she posted a career-best finish taking runner-up at the WCWA National Championships.