| Games: | World Aquatics Championships |
| Nf: | IRI |
| Nfname: | Iran Amateur Swimming Federation |
| Year: | 2017 |
| Flagcaption: | Flag of Iran |
| Location: | Budapest, Hungary |
| Competitors: | 1 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 1998 |
Iran competed at the 2017 World Aquatics Championships in Budapest, Hungary from 14 July to 30 July.
See main article: Swimming at the 2017 World Aquatics Championships. Iran has received a Universality invitation from FINA to send one male swimmer to the World Championships.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Mehdi Ansari | Men's 50 m butterfly | 25.02 | 46 | did not advance | |||
| Men's 100 m butterfly | 55.31 | 56 | did not advance | |||||