Nephi ( ) is a city in and the county seat of Juab County, Utah, United States. It is part of the ProvoâÂÂOrem metropolitan area. The population was 6,443 at the 2020 census. It was settled by George Washington Bradley and other Mormon pioneers. George Washington Bradley was also commander of the military post at Nephi, Utah, during the Walker War of 1854. Nephi is the principal city in the Juab Valley, an agricultural area. Nephi was named after Nephi, son of Lehi, from the Book of Mormon.
Before the area was settled, the site along Salt Creek was first a camping place along the Old Mormon Road to Southern California. Mormon settlers established a settlement at the site in 1851, naming it after the creek. It retained that name until 1882 when the town and its post office became Nephi.
As of the 2020 census, Nephi had a population of 6,443. The median age was 30.9 years. 32.7% of residents were under the age of 18 and 13.4% of residents were 65 years of age or older. For every 100 females there were 107.2 males, and for every 100 females age 18 and over there were 102.9 males age 18 and over.
98.1% of residents lived in urban areas, while 1.9% lived in rural areas.
There were 2,010 households in Nephi, of which 44.2% had children under the age of 18 living in them. Of all households, 66.8% were married-couple households, 13.7% were households with a male householder and no spouse or partner present, and 16.8% were households with a female householder and no spouse or partner present. About 17.9% of all households were made up of individuals and 9.3% had someone living alone who was 65 years of age or older.
There were 2,135 housing units, of which 5.9% were vacant. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 7.6%.
The median income for a household in the city was $97,348. Males had a median income of $74,743 versus $50,222 for females. The per capita income for the city was $34,229. About 1,672 families (margin of error about 126) were 5.0% below the poverty level (error margin of 3.6%); 607 (ñ99) of those families had children related to the householder between 5 and 17 years of age and 219 (ñ99) included householders who were 65 years of age or older.
Nephi is in eastern Juab County in the Juab Valley, between the Wasatch and San Pitch Mountains to the east and the lower West Hills and Long Ridge to the west. Interstate 15 runs along the eastern edge of the city, with access from Exits 222, 225, and 228. I-15 leads north to Spanish Fork and south to Scipio. Utah State Route 28, Nephi's Main Street, runs north to I-15 and south to Gunnison. Utah State Route 132 crosses Main Street in the center of town, leading southeast to Moroni and southwest to Leamington.
According to the U.S. Census Bureau, Nephi has a total area of , all land.
In the Köppen climate classification, Nephi has either a humid subtropical climate (Cfa) or humid continental climate (Dfa) depending on which variant of the system is used.
It is in the Juab School District.