List of Boeing B-17 Flying Fortress Operators

This list of Boeing B-17 Flying Fortress operators is a list of users who flew and operated the Boeing B-17.

The B-17 was among the first mass-produced four-engined heavy bombers. A total of more than 12,000 were made, making its use as a heavy bomber second only to the B-24 Liberator. Though used at some point in all theatres of World War II, it was most common in the European Theatre, where its lack of range and smaller bombload relative to other heavy bombers was not so detrimental as it was in the Pacific, where most American military airbases were thousands of miles apart.