|Centuries:||19th century - 20th century - 21st century|
|Decades:||1910s 1920s 1930s - 1940s - 1950s 1960s 1970s|
|Years:||1940 1941 1942 1943 1944 1945 1946 1947 1948 1949|
- May 21 - George Albert Smith ordained and set apart as President of The Church of Jesus Christ of Latter-day Saints, with J. Reuben Clark, Jr., and David O. McKay as counselors.
- May 14 - Heber J. Grant dies in Salt Lake City.