Oklahoma State Route 39 runs east-west across Mc Clain County. This links the city of Purcell to Chickasha. OK St Rt 39 passes through the following towns in Mc Clain County. Pucell Dibble OK St Rt 39 is multi-plexed in MC Clain County. U.S. Rt. 77, at Purcell. Oklahoma State Route 74, at Purcell. OK St Rt 39 crosses the following highways in Mc Clain County. U.S. Rt. 77, at Purcell. Oklahoma State Route 74, at Purcell. U.S. Rt. 77, at Purcell. Oklahoma State Route 74, at Purcell. Interstate 35, at Purcell. (NO INTERCHANGE) Oklahoma State Route 24, near Washington. Oklahoma State Route 59, near Criner. Oklahoma State Route 76, near Dibble.
