Poland competed at the 2013 World Aquatics Championships in Barcelona, Spain between 19 July and 4 August 2013.

Poland qualified 2 quota places for the following diving events.^[1]

Men

Poland qualified one quota places for the following high diving event.^[2][3]

Polish swimmers earned qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard entry time, and 1 at the B-standard):^[4][5]

Men

More information Athlete, Event ...

Athlete	Event	Heat		Semifinal		Final
		Time	Rank	Time	Rank	Time	Rank
Konrad Czerniak	100 m freestyle	48.50	2 Q	48.78	15	did not advance
	50 m butterfly	23.72	21	did not advance
	100 m butterfly	52.12	9 Q	51.55	3 Q	51.46
Paweł Furtek	800 m freestyle	8:00.56	21	—		did not advance
	1500 m freestyle	15:13.88	14	—		did not advance
Radosław Kawęcki	100 m backstroke	54.20 NR	=10 Q	53.82 NR	9	did not advance
	200 m backstroke	1:57.99	11 Q	1:56.14	=3 Q	1:54.24 EU
Paweł Korzeniowski	100 m butterfly	52.16	11 Q	51.85	9	did not advance
	200 m butterfly	1:56.61	7 Q	1:55.67	3 Q	1:55.01
Sławomir Kuczko	200 m breaststroke	2:12.21	20	did not advance
Mikołaj Machnik		2:11.98	19	did not advance
Michał Poprawa	200 m butterfly	1:58.34	20	did not advance
Mateusz Sawrymowicz	1500 m freestyle	15:06.45	10	—		did not advance
Jan Świtkowski	200 m freestyle	1:48.93	23	did not advance
	200 m individual medley	2:02.40	30	did not advance
Dawid Szulich	50 m breaststroke	27.48 NR	11 Q	27.53	=10	did not advance
	100 m breaststroke	1:00.54 NR	18	did not advance
Filip Zaborowski	400 m freestyle	3:50.22	15	—		did not advance
	800 m freestyle	7:55.65	10	—		did not advance
Filip Bujoczek Michał Poprawa Jan Świtkowski Dawid Ziełinski	4 × 200 m freestyle relay	7:19.07	14	—		did not advance
Konrad Czerniak Radosław Kawęcki Paweł Korzeniowski Dawid Szulich	4 × 100 m medley relay	DSQ		—		did not advance

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Women