The Republican caucuses were held on Saturday, March 10, 2012. Kansas has 40 delegates to the 2012 Republican National Convention. 25 of these delegates are allocated proportionally to candidates who exceed a 20% threshold in the statewide vote tally. The 15 remaining delegates are 'winner-take-all' delegates. 12 delegates are given (3 each) to the candidates with most votes in each of Kansas's 4 congressional districts. 3 delegates are awarded to the candidate with most votes statewide.
Rick Santorum won the caucus and will receive 33 delegates. He won the state with 51% of the statewide vote and received most votes in all of the congressional districts, thus winning 15 delegates. As only Santorum and Mitt Romney exceeded the 20% threshold, 18 of the 25 proportionally allocated delegates were allocated to Santorum and 7 to Romney.