From AllGov.com:

As of April 30, there were 1,017,618 active handgun license holders in Texas, according to the state agency that oversees the process, the Department of Public Safety. That means there are more people in Texas with permission to carry a gun than there are residents of the city of Fort Worth. Texas’ numbers far exceed those in several other states. Oklahoma has more than 251,000. South Carolina has 276,084. Washington state, 534,978. Tennessee, 555,865. But at least one state has more license holders: Florida, with 1,743,954.

However, Texas, with 5,672 permits issued per 100,000 adults 21 and over, is not the state with the most gun permits per capita. Florida (11,965 permits per 100,000 adults), Tennessee (11,851 per 100,000 adults) and Washington state (10,635 per 100,000 adults) are some of the leaders by that measure.