Each dot in the charts below represents a single caucus precinct. The dots are positioned on the charts based on the percentage of the vote the candidate received in that precinct.
Mr. Trump’s strength on Monday cut across many different kinds of areas. His lead was most pronounced in areas with fewer college-educated voters.
Mr. DeSantis finished a distant second, trailing Mr. Trump by double digits. Mr. DeSantis has not found consistent pockets of support among key demographic groups, despite campaigning in all 99 Iowa counties, and earning the endorsement of key state officials and religious leaders.
Ms. Haley performed best in areas that are wealthier and those that have a higher concentration of college-educated voters. These include precincts that surround cities like Des Moines and Iowa City.
Higher income areas are precincts where the median household income is $100,000 or more; lower income areas are where the median household income is less than $50,000. Areas with more college graduates are precincts where more than 40 percent of the population has a college education; areas with fewer college graduates are precincts where less than 15 percent of the population graduated college. The classification of areas as urban, rural or suburban is derived from research by Jed Kolko.
Chris Christie dropped out of the presidential race last week, but the Iowa Republican Party will still tabulate any votes he receives in the caucuses.
Election results are from The Associated Press. The Times publishes its own estimates for the number of remaining votes, based on historic turnout data and reporting from results providers. These are only estimates, and they may not be informed by reports from election officials.
See Iowa precinct result maps published by The Times in 2016 and 2020.
Sources: The Associated Press; Iowa Republican Party; Iowa Secretary of State; L2; U.S. Census Bureau