Kaia Parnaby (born July 14, 1990) is an Australian, former collegiate All-American, 2020 Olympian, left-handed professional softball pitcher, originally from Sydney.

She played university softball for the Hawaii Rainbow Wahine team in the Big West Conference where she was recognized as all-conference and the 2013 Pitcher of The Year.

She is a member of the senior Australia women's national softball team and played in the 2020 Summer Olympics.

[8] In 2006, she played for the New South Wales side that won the Australian All Schools Softball Championship.

[17] Parnaby transferred to North Shore District Softball Association in 2007 joining their Open Women's and State League teams.

She went 1–2 for Team Australia, tossing 13 innings and surrendering 13 hits, 6 earned runs for a 3.23 ERA and 1.15 WHIP, also totaling two walks and struck out 7.

[13] In a March 2012 game in the Bank of Hawaii Invitational against Radford University, she struck out eight players and limited them to three hits in a 7–0 victory for her team.