Nephi is a city in Juab County, Utah, United States. It is part of the Provo–Orem, Utah Metropolitan Statistical Area. The population was 4,733 at the 2000 census. It is the county seat of Juab County. It was settled by Mormon pioneers in 1851, and is the principal city in Juab Valley, an agricultural area. Nephi was named after Nephi, son of Lehi from the Book of Mormon.

According to the United States Census Bureau, the city has a total area of 4.2 square miles (10.8 km²), all of it land.

As of the census of 2000, there were 4,733 people, 1,430 households, and 1,149 families residing in the city. The population density was 1,133.8 people per square mile (438.2/km²). There were 1,552 housing units at an average density of 371.8 per square mile (143.7/km²). The racial makeup of the city was 96.98% White, 0.11% African American, 0.63% Native American, 0.46% Asian, 0.02% Pacific Islander, 0.97% from other races, and 0.82% from two or more races. Hispanic or Latino of any race were 2.45% of the population.

Utah (/ˈjuːtɔː/ or ⁱ/ˈjuːtɑː/) (Arapaho: Wo'tééneihí' ) is a state in the Western United States. It became the 45th state admitted to the Union on January 4, 1896. Utah is the 13th-most extensive, the 34th-most populous, and the 10th-least-densely populated of the 50 United States. Approximately 80% of Utah's 2,817,222 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the sixth most urbanized in the U.S. The name "Utah" is derived from the name of the Ute tribe and means "people of the mountains" in the Ute language. Utah is bordered by Arizona on the south, Colorado on the east, Wyoming on the northeast, Idaho on the north and Nevada on the west. It also touches a corner of New Mexico.

Utah is the most religiously homogeneous state in the Union. It is home to the Salt Lake Temple, and approximately 60% of Utahns are reported to be members of LDS Church which greatly influences Utah culture and daily life.