James Mayer
James, Jim, or Jamie Mayer may refer to:
- James W. Mayer, American applied physicist
- James Mayer (spy), Mauritian secret agent during World War II
- Jim Mayer (musician), American guitarist, singer-songwriter, and producer
- James Erskine Mayer, American baseball player with the Philadelphia Phillies, the Pittsburgh Pirates, and the Chicago White Sox
- Jamie Mayer, Scottish former professional rugby player
- Jim Mayer (ice hockey), Canadian ice hockey player