| Conflict: | Battle of Sagami Bay |
| Partof: | World War II |
| Date: | 22-23 July 1945 |
| Place: | off Bōsō Peninsula |
| Result: | American victory |
| Combatant1: |  United States |
| Commander1: | T.H. Hederman |
| Commander2: | Unknown |
| Units1: | United States Navy Destroyer Squadron 61 [1] |
| Units2: | Imperial Japanese Navy |
| Strength1: | 9 destroyers |
| Strength2: | 1 minesweeper 1 submarine chaser 2 freighters |
| Casualties1: | None |
| Casualties2: | 1 freighter sunk 1 freighter damaged |
The Battle of Sagami Bay was a World War II anti-shipping raid off the tip of Bōsō Peninsula on the night of 22 July 1945. It was the last surface action of the war. Destroyer Squadron 61 (DesRon 61) of the U.S Navy engaged with a Japanese convoy consisting of two freighters escorted by subchaser No. 42 and minesweeper No.1. The Americans sank a freighter, No.5 Hakutetsu Maru of 800lk=onNaNlk=on, and damaged another freighter, Enbun Maru of 6919LT. The Japanese escorts were not damaged.