The Tennessee-class cruisers were four armored cruisers built for the United States Navy between 1903 and 1906. Their main armament of four 10-inch (254 mm) guns in twin turrets was the heaviest carried by any American armored cruiser. Their armor was thinner than that of the six Pennsylvanias which immediately preceded them, a controversial but inevitable decision due to newly imposed congressional restraints on tonnage for armored cruisers and the need for them to be able to steam at 22 knots (41 km/h; 25 mph). However, the fact their armor covered a wider area of the ship than in the Pennsylvanias and their increased firepower caused them to be seen by the Navy as an improvement.

The Tennessees were the largest and last American armored cruisers built, a response to foreign developments and the changing notion of the armored cruiser from fast scout, convoy escort and commerce raider to auxiliary capital ship in a battle line, despite its thin armor protection compared to that of battleships. The Battle of Tsushima in 1905 was seen to validate this concept. While they were being built, questions remained in U.S. naval circles over whether they possessed enough speed, armament or armor to perform their intended duties adequately. They were generally considered armed and protected strongly enough to combat an enemy armored cruiser successfully. Even so, it was generally conceded that with this class a limit had been reached and that the modern armored cruiser no longer exemplified the logical principles of attack and defense in warship design, which meant using the most efficient weapon to its desired end. The appearance of the British Invincible-class battlecruisers, with their greater speed and firepower, ensured their obsolescence as fighting units.