During WW2 the US Navy built 126 submarines.
75
52 US submarines were lost in WW2. This was about 1 in every 5 submarines that the US had in WW2
The US Navy currently has 14 active duty Trident (Ohio Class) Ballistic Missile Submarines. They are scheduled for replacement beginning in 2028.
1. Ballistic submarines 2. Attack submarines
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Yes, submarines were used by the Confederate Navy in the US Civil War.
At the beginning of 1917 the German navy had 111 submarines. This was a large increase from 1916 when they had only 68.
Submarines and Aircraft Carriers
At the time of the attack on Pearl Harbor, the U.S. Navy had 111 submarines in commission. It commissioned 203 more during the course of the war.
The PLA navy has more than 225,000 personnel and is thought to have as many as 70 submarines, 10 of them nuclear-powered
$2.4 billion for the newest Virginia Class attack submarines
USN about 250.