The U-107 class was a class of submarines or U-boats planned for the Austro-Hungarian Navy () during World War I. The design was similar to the Germaniawerft UD design which had formed the basis for the Austro-Hungarian Navy's U-7-class submarines. Two boats (U-107 and U-108) were laid down in early 1918 by Ganz Danubius in Fiume, but neither was launched or completed before the end of the war. No other submarines of the class were ever laid down.