|Centuries:||19th century - 20th century - 21st century|
|Decades:||1960s 1970s 1980s - 1990s - 2000s 2010s 2020s|
|Years:||1990 1991 1992 1993 1994 1995 1996 1997 1998 1999|
- September 15 - Dedication of Memorial in honor of those who died at Mountain Meadows.
- USSR granted permission for the Mormon Church to establish congregations in Russia.