The poll showed Trump leading Clinton 50 percent to 44 percent. Former GOP nominee Mitt Romney won the Lone Star State over President Barack Obama in 2012 by 16 points.
Trump still led Clinton by six points when third-party candidates were included in the race, 44 percent to 38 percent, with Libertarian candidate Gary Johnson polling at 6 percent, the Green Party's Jill Stein polling at 2 percent, and Independent Evan McMullin, who was included in the questionnaire, sitting at 0 percent.
PPP had not previously polled Texas voters for the 2016 general election. A poll from Dixie Strategies conducted Aug. 8-9 put Trump ahead of Clinton by 11 points, 46 percent to 35 percent.
PPP surveyed 944 likely Texas voters by phone and opt-in internet survey from Aug. 12-14. The poll has a margin of error of plus or minus 3.2 percent.
TPM's PollTracker Average shows Trump leading Clinton 48.7 to 41.