What U.S. state has the most prisons?

Here's a list of U.S. federal prisons:

https://en.wikipedia.org/wiki/List_of_U.S._federal_prisons

List of U.S. state prisons:

https://en.wikipedia.org/wiki/List_of_U.S._state_prisons

List of U.S. military prisons:

https://en.wikipedia.org/wiki/List_of_U.S._military_prisons

Texas.

Here is a great big list: https://en.wikipedia.org/wiki/List_of_Texas_state_prisons

I've not been through all the states on Zbeckabee's links but this - http://drugwarfacts.org/cms/?q=node/62

..says that: "Texas is in a league of its own, as it added the most prisons (120), currently has the largest number of prisons in operation (137), and experienced the largest percentage increase (706 percent)."

(Referring to Prisons built since '79)

Another data point for Texas:

As usual, Texas did more than its share. It continues to have more prisoners than any other state, and not by a smidgen, either. At the end of 2013, Texas had about 24 percent more prisoners than California, the No. 2 state. Besides an overall growth in prisoner population, Texas also saw a modest growth in prison admissions-1.5 percent-but a striking, almost 10 percent drop in prisoner releases. In other words, authorities are locking up somewhat more people but releasing far fewer.

https://www.texasobserver.org/prisoners-problems-mass-incarceration-climbs/