Australia at the 2023 World Aquatics Championships

Australia competed at the 2023 World Aquatics Championships in Fukuoka, Japan from 14 to 30 July.

Athletes by discipline

The following is the list of number of competitors participating at the Championships per discipline.

Sport	Men	Women	Total
Artistic swimming	0	11	11
Diving	4	5	9
High diving	0	3	3
Open water swimming	4	4*	8*
Swimming	16	15*	31*
Water polo	15	15	30
Total	39	52	91

Moesha Johnson was compete in both open water swimming and indoor swimming.

Artistic swimming

Australia's artistic swimming team consisted of eleven athletes.
;Women
;Mixed

Diving

Australia's diving team consisted of nine athletes. Lauren Flint was originally named in the team, however withdrew days before competition due to breaking her elbow in training.
;Men
;Women
;Mixed

High diving

Australia's high diving team consisted of three athletes.
;Women

Athlete	Event	Points	Rank
Emily Chinnock	Women's high diving	194.20	19
Rhiannan Iffland	Women's high diving	357.40
Xantheia Pennisi	Women's high diving	290.20	6

Open water swimming

Australia's open water swimming team consisted of eight athletes.
;Men

Athlete	Event	Time	Rank
Kyle Lee	Men's 5 km	55:32.70	8
Jack Wilson	Men's 5 km	56:24.00	13
Bailey Armstrong	Men's 10 km	1:55:32.8	34
Nicholas Sloman	Men's 10 km	1:51:42.2	7

;Women

Athlete	Event	Time	Rank
Bianca Crisp	Women's 5 km	1:01:19.8	20
Moesha Johnson	Women's 5 km	59:46.3	10
Maddy Gough	Women's 10 km	2:04:18.6	23
Chelsea Gubecka	Women's 10 km	2:02:38.1

;Mixed

Athlete	Event	Time	Rank
Chelsea Gubecka Moesha Johnson Nicholas Sloman Kyle Lee	Team relay	1:11:26.7

Swimming

Australia's swimming team consisted of thirty-one athletes.
;Men
;Women
;Mixed

Water polo

;Summary

Men's tournament

;Team roster
;Group play
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;Playoffs
;9–12th place semifinals
;Ninth place game

Women's tournament

;Team roster
;Group play
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;Playoffs
;Quarterfinals
;Semifinals
;Third place game