Lists of U-boats

Lists of U-boats cover U-boats, military submarines operated by Germany, particularly in the First and Second World Wars.
 * List of German U-boats
 * List of U-boat types of Germany
 * List of U-boat flotillas of Germany
 * List of U-boats never deployed of World War II Germany
 * Uncompleted U-boat projects of World War II Germany
 * List of most successful German U-boats of Germany for kill tonnage in World War I and World War II
 * Foreign U-boats of World War II Germany
 * List of Austro-Hungarian U-boats