27 attacks recorded (7 fatal)
| Date | Country | Region | Location | Fatal? | |
|---|---|---|---|---|---|
| Jan 7th 1931 | Australia | Queensland | Yeppoon, near Ross Creek | N | |
| Jan 14th 1931 | Australia | Torres Strait | N | ||
| Jan 24th 1931 | Australia | Torres Strait | Near Thursday Island | N | |
| Feb 10th 1931 | Australia | New South Wales | Maroubra Beach | N | |
| Mar 6th 1931 | Australia | South Australia | Encounter Bay | N | |
| Mar 22nd 1931 | Australia | Queensland | Ross River, Townsville | Y | |
| Apr 27th 1931 | French Southern Territories | Y | |||
| May 2nd 1931 | Australia | New South Wales | Kempsey | N | |
| Jun 4th 1931 | USA | Florida | Key West | N | |
| Jun 13th 1931 | USA | Hawaii | Pearl Harbor, O'ahu | N | |
| Jun 14th 1931 | USA | Hawaii | Pearl Harbor, O'ahu | N | |
| Jul 1st 1931 | Papua New Guinea | N | |||
| Jul 1st 1931 | Tonga | Niua | Niuafo'ou Island | Y | |
| Jul 15th 1931 | USA | New Jersey | Sea Girt | N | |
| Jul 28th 1931 | Fiji | Viti Levu Island | Tamavua River | N | |
| Aug 1st 1931 | Australia | Queensland | Port Douglas | Y | |
| Aug 6th 1931 | USA | New Jersey | Sandy Hook (ocean side) | N | |
| Aug 18th 1931 | USA | Texas | Off Brownsville | N | |
| Aug 23rd 1931 | Cuba | Habana Province | Miramar, Havana | Y | |
| Aug 25th 1931 | Cuba | Habana Province | Havana, Miramar subdivision | Y | |
| Aug 27th 1931 | USA | New Jersey | 1 mile ESE of Navesink | N | |
| Aug 30th 1931 | USA | Hawaii | N | ||
| Sep 1st 1931 | Cuba | Habana Province | Vedado Baths, Miramar, Havana | Y | |
| Sep 2nd 1931 | USA | Hawaii | Kahala, O'ahu | N | |
| Sep 21st 1931 | USA | Florida | Municipal Beach, West Palm Beach, Palm Beach County | N | |
| Sep 21st 1931 | USA | Florida | Municipal Beach, West Palm Beach, Palm Beach County | N | |
| Nov 26th 1931 | Australia | Torres Strait | Barrier Reef near Innisfail | N |