What was the first commissioned submarines?

The first commissioned submarine was the U.S. Navy's USS Holland (SS-1), built by submarine pioneer John Holland. She was commissioned in 1900, a year before the British submarine Holland 1, also built by Holland.

The USS Holland originally began life as the Holland IV, her keel being laid in 1896. It was the forerunner of all modern submarine designs, incorporating all of Holland's key submarine inventions/patents. The USS Holland became the first successful diesel-electric powered boat, with reloadable torpedo tubes, that also had a working ballast/trim system for precise dives and surfaces.