His mother, Linda Hanks, says A&M University police called her early Thursday to say the 18-year-old has been found unharmed.
Police said Wednesday that Johnson was last seen leaving his College Station residence around 5 p.m. Monday.
Hanks told WFAA-TV (http://bit.ly/m32dB ) she had traveled from Dallas to College Station as authorities searched for her son. Meanwhile, Johnson turned up 180 miles to the north, in Dallas.
Hanks says Johnson has not contacted her since his disappearance and that she had no other information.
Campus police scheduled a news conference for Thursday morning.
Johnson has appeared in 10 games this season, and has 30 catches for 339 yards and a touchdown.
Source: Associated Press