2018 NASCAR PrimeStar Series (Johnsonverse)

The 2018 NASCAR PrimeStar Series is the 37th season of the NASCAR PrimeStar Series, a stock car racing series sanctioned by the NASCAR in the United States. William Byron won the 2017 championship with JR Motorsports, but moved up to the NASCAR Panasonic Cup Series. Tyler Reddick will drive the JR Motorsports entry left vacant by Byron full-time. Christopher Bell is the current points leader.

This is the final season in which PrimeStar will sponsor the series, as in 2019, Anhauser-Busch, who had sponsored the series from 1984 to 2007, will return, and the series will revert to the name NASCAR Busch Grand National Series.