The 2008 Maryland Republican primary took place on February 12, 2008. The state sent 37 delegates to the 2008 Republican National Convention in St. Paul, Minnesota. Three delegates were awarded to the winner of each of the state's eight congressional districts; the remainder of the state's delegates were at-large. John McCain won the primary election.
In opinion polling conducted on February 7 and 8, John McCain was the heavy favorite among Maryland's Republican voters. 56% of respondents supported him, 17% Mike Huckabee, 10% Ron Paul, with the rest scattered or undecided.