31st U-boat Flotilla

31. Unterseebootsflottille
Active	September 1943–May 1945
Country	Nazi Germany
Branch	Kriegsmarine
Type	U-boat flotilla
Garrison/HQ	Hamburg Wilhelmshaven Wesermünde
Commanders
Notable commanders	Korvkpt. Carl Emmermann

31st U-boat Flotilla ("31. Unterseebootsflottille") was a training flotilla ("Ausbildungsflottille") of the German Kriegsmarine during World War II.

The flotilla was formed in Hamburg in September 1943 under the command of Kapitän zur See Bruno Mahn. Later based at Wilhelmshaven, and then Wesermünde, it was commanded by Carl Emmermann for the final month of the war. It was disbanded in May 1945 when Germany surrendered.

Flotilla commanders

• Kapitän zur See Bruno Mahn (September 1943–April 1945)
• Korvettenkapitän Carl Emmermann (April–May 1945)

Assigned U-boats

156 U-boats were assigned to this flotilla during its service.

U-120 U-121 U-140 U-141 U-148 U-150 U-151 U-152 U-235 U-236 U-237 U-251 U-276 U-287 U-291 U-316 U-349 U-350 U-367 U-368

U-369 U-397 U-428 U-429 U-430 U-554 U-560 U-612 U-677 U-679 U-680 U-681 U-682 U-683 U-708 U-712 U-720 U-721 U-722 U-733

U-746 U-747 U-748 U-768 U-771 U-772 U-773 U-774 U-775 U-776 U-777 U-778 U-779 U-903 U-905 U-907 U-922 U-924 U-975 U-977

U-982 U-999 U-1000 U-1001 U-1002 U-1003 U-1004 U-1005 U-1006 U-1007 U-1008 U-1009 U-1010 U-1013 U-1014 U-1015 U-1016 U-1017 U-1018 U-1019

U-1020 U-1021 U-1022 U-1023 U-1024 U-1101 U-1103 U-1132 U-1167 U-1192 U-1193 U-1194 U-1196 U-1197 U-1198 U-1201 U-1204 U-1224 U-1225

U-1226 U-1227 U-1228 U-1229 U-1230 U-1231 U-1232 U-1233 U-1234 U-1235 U-2501 U-2502 U-2503 U-2504 U-2505 U-2506 U-2507 U-2508 U-2509

U-2510 U-2511 U-2512 U-2513 U-2514 U-2515 U-2516 U-2517 U-2518 U-2519 U-2520 U-2521 U-2522 U-2523 U-2524 U-2525 U-2526 U-2527 U-2528

U-2529 U-2530 U-2531 U-2533 U-2534 U-2535 U-2536 U-2538 U-2539 U-2540 U-2541 U-2542 U-2543 U-2544 U-2545 U-2546 U-2548 U-2551 U-2552