Type: VII-C
Built by: Bremer Vulkan (Vegesak)
Launched: 5 July, 1941
Commissioned: 30 August, 1941
Feldpost Nr.: M00158
Sunk: 11 July, 1942
Sunk by: sloop HMS SPEY, sloop HMS PELICAN and destroyer HMS LEOPARD
Location sunk: NW off Canary Islands
Position sunk: 33.30N x 22.52W (all hands lost, 45 men)

U-136 entering her bunker at St. Nazaire

Kapitänleutnant Heinrich Zimmermann was the only C.O. of U-136.

U-136 was assigned to the 6th U-BootFlotille based at St. Nazaire. This boat had three feindfahrtenen (war patrols). The first was in the North Atlantic where she sank two Royal Navy escorts. Her second was off the American east coast, from New York to Cape Hatteras and Florida in April of 1942. She was operating against a Gibraltar bound convoy to the west of Spain on her third patrol when she was lost.

SHIPS SUNK BY U-136
05.02.42	HMS ARBUTUS	Brit CORVETTE	925 GRT
11.02.42	HMS SPIKENARD	Brit CORVETTE	925 GRT
11.02.42	unknown	unknown	unknown
(one detonation was heard, but no visual observations on this second attack. There was no confirmation.)
17.02.42	EMPIRE COAST	Brit stmr	6,914 GRT
(EMPIRE COAST was a straggler from Convoy HX.174 and suffered the fate of so many stragglers)
24.04.42	EMPIRE DRUM	Brit mtrshp	7,244 GRT
28.04.42	ARUNDO	Neth stmr	5,163 GRT
08.05.42	MILDRED PAULINE	Canada sail	300 GRT
SHIPS DAMAGED BY U-136
19.04.42	AXTELL J. BYLES	Amer tnkr	8,955 GRT
01.05.42	ALCOA LEADER Amer stmr	5,041 GRT
(They heard one hit after six minutes but were unable to observe any results. B-Dienst, the German radio listening service, reported one hit on ALCOA LEADER)