U.S. cement production is widely dispersed with the operation of 113 cement plants in 36 states.

http://www.cement.org/econ/industry.asp

What is the total number of cement production plants?

There were 113 plants and 167 kilns in 2008. In 2005, there were 186
kilns at 115 plants.

http://www.unep.org/hazardoussubstances/Porta...-15-10.pdf