Mormon War may refer to:
1838 Mormon War (a.k.a. Missouri Mormon War), a conflict in 1838 between Latter Day Saints and their neighbors in northwestern Missouri Illinois Mormon War, a conflict in 1844–1846 between Latter Day Saints and their neighbors in western Illinois Utah War, a conflict in 1857–1858 between Latter Day Saints in Utah Territory and the United States federal government
See also Mormonism and violence