John C. Hamer

Pastor
John Hamer
Hamer in May 2025
Born1970 (age 55–56)
CitizenshipCanadian
EducationBrigham Young University (B.A.)
University of Michigan (M.A., 1995)
Occupationscartographer, historian, minister
SpouseMike Karpowicz
OrdainedCommunity of Christ
Religious life
ReligionChristianity
DenominationCommunity of Christ
(Restorationist,Progressive Latter Day Saint)
ChurchToronto Congregation at Centre Place
(founded in 1891)
ProfessionPastor
Websitesaintswithoutborders.weebly.com
www.centreplace.ca

John C. Hamer (born 1970) is an American-Canadian historian, mapmaker, and minister. His research has focused primarily on the history of the Latter Day Saint movement, authoring several books on the topic. Hamer is a leading expert on various schisms within especially non-far-Western (U.S.) portions of the Latter Day Saint "Restoration" movement. Raised in the Church of Jesus Christ of Latter-day Saints (LDS Church), Hamer left the religion before joining Community of Christ in 2010. He serves as Pastor of its Toronto Congregation.

Hamer was a contributor to By Common Consent, the Restoration Studies Coordinator at Sunstone Education Foundation, and the Executive Director of the John Whitmer Historical Association.