Czech Republic is scheduled to compete at the 2017 World Aquatics Championships in Budapest, Hungary from 14 July to 30 July.

Czech Republic qualified one male high diver.

[1] The Czech Republic has entered four open water swimmers[2][3] Czech swimmers have achieved 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] Czech Republic's synchronized swimming team consisted of 4 athletes (4 female).

[5] Legend: (R) = Reserve Athlete