Ashleigh Katherine Gardner (born 15 April 1997) is an Australian cricketer who currently plays for the national women's team as an all-rounder. A right-handed batter and right-arm off spinner, Gardner also plays for New South Wales in the Women's National Cricket League (WNCL), for the Sydney Sixers in the Women's Big Bash League (WBBL) and for the Gujarat Giants in the Women's Premier League (WPL). She has won three world championships and four national titles with her respective teams, while also gaining numerous individual honours, including the Belinda Clark Award.

Following standout performances throughout the 2014–15 Imparja Cup, Gardner made her WNCL debut for New South Wales in the 2015–16 season, and joined the Sydney Sixers for the inaugural WBBL season. In the same summer, she played one T20 and one 50-over game in New Zealand for Northern Districts (not to be confused with one of her local NSW Premier Cricket teams, Northern District Cricket Club).

Gardner enjoyed a breakout 2016–17 season, winning championships with both the Sixers and New South Wales, as well as being named the Young Gun of WBBL|02. Her participation in the WBBL final was impacted as she was forced from the field with heat exhaustion, reportedly as a precaution after a head knock at training two days earlier.

Moving to South Australia for the 2017–18 WNCL season, Gardner played just six games for her new team before returning to her native New South Wales. She began WBBL|03 in commanding fashion with an innings of 114 off 52 balls against the Melbourne Stars at North Sydney Oval, recording the league's fastest half-century and highest individual score. The Sixers went on to claim back-to-back championships, with Gardner contributing 22 not out in the final against the Perth Scorchers at Adelaide Oval. She was cleared to play in the final of the 2018–19 WNCL season, having been a late withdrawal from the previous match due to suffering mild concussion during warm-ups, managing 30 not out with the bat and 2/36 with the ball in the 33-run victory over Queensland.

While fielding during a WBBL|06 match at Drummoyne Oval, Gardner experienced the seventh concussion incident of her professional career and was substituted out of the contest. She subsequently missed the remaining three games of the season. After an underwhelming 2021–22 campaign, Gardner rebounded strongly in WBBL|08 and was named Player of the Tournament—the first time the award was claimed by a past Young Gun winner.

In February 2023, in the inaugural WPL auction, she was bought by Gujarat Giants for ₹3.2 crores.

Gardner was named in Australia's squad for a home 2016–17 series against New Zealand, and made her Women's Twenty20 International (WT20I) debut on 17 February at the Melbourne Cricket Ground, but was run out for a golden duck in the 40-run win. She took her first international wicket in the following game of the series, dismissing Amy Satterthwaite via a Kristen Beams catch.

Touring New Zealand with the Australian squad for the 2016–17 Rose Bowl series, Gardner made her Women's One Day International (WODI) debut on 2 March at Bay Oval. She scored 12 not out with the bat, hitting the match-winning runs in her team's four-wicket victory. In June 2017, Gardner became the first Indigenous Australian woman to appear in a cricket World Cup, playing against the West Indies in the 2017 Women's Cricket World Cup. She went on to take eight wickets from as many matches in the tournament, from which Australia was eliminated in the semi-finals.