R.K. Smith (October 16, 1937 - ) is a former NASCAR driver from Murrietad, CA. He competed in two Nextel Cup Series events in his career.
His first race came in 1991, when Smith raced at Sonoma. Starting 36th in the field, Smith completed just two laps before engine problems left him last in the race (43rd).
It went a bit better when Smith returned to the track in 1992, starting 29th. This time Smith completed most of the laps, but engine problems again derailed his efforts and left him 33rd.