A tee portion and a height regulating portion cooperate to form a height adjustable golf tee where the user may readily and easily adjust placement of the height regulating portion relative to a placement zone along the tee portion and lock the height regulating portion at a desired location defined by the user. The height regulating portion is locked onto the tee portion during assembly where it may not inadvertently become separated during use, transport or storage. The height regulating portion is easily transferred between an adjustment position and a locking position utilizing a simple toggle like action. The height adjustable golf tee provides for a golf ball to be retained consistently at a user defined elevation above the ground during play of the game of golf.