Peter Kenneth Obst (1937–2017)^[1] was an Australian rules footballer who played with Port Adelaide and Woodville in the South Australian National Football League (SANFL). During his time at Port Adelaide he was a member of the club's record six premierships in a row, winning the club's best and fairest in the fifth premiership year during 1962.^[2] He left Port Adelaide in 1965 to take up a coaching offer at Woodville where he stayed for three years, winning that club's leading goal-kicker award in 1967. He returned to Port Adelaide for the last two years of his playing career.

Post-playing he worked as a football commentator for the ABC.

His father Ken Obst, brother Trevor Obst and son Andrew Obst were also accomplished footballers.

He died on 11 May 2017, aged 80.^{[3] [4]}