Guadalupe County Judge Mike Wiggins says he will turn in his resignation letter March 26. He announced his plans Tuesday during a county commission meeting.
Wiggins had faced public criticism following his Feb. 6 arrest at a hotel in College Station.
The 58-year-old former Texas trooper was attending a conference when a hotel worker noticed the smell of burning marijuana. Security traced the odor to the county judge's room.
Police say a search turned up rolling papers and a bag of what appeared to be marijuana. Wiggins, who was elected in 2006, is free on $3,000 bond.
Commissioner Kyle Kutscher is expected to serve as acting county judge.