Kaysville is a city in Davis County, Utah. It is part of the Ogden–Clearfield metropolitan area. The population was 32,945 at the time of the 2020 census.

Kaysville is home to the USU Botanical Gardens, which also serve as an extension location and distance education center for Utah State University.

Shortly after Latter Day Saint pioneers arrived in 1847, the Kaysville area, originally known as "Kay's Creek" or Kay's Ward, was settled by Hector Haight in 1847 as a farming community. He had been sent north to find feed for the stock and soon thereafter constructed a cabin and brought his family to settle the area. Farmington, Utah also claims Hector Haight as its original settler. Two miles north of Haight's original settlement, Samuel Holmes built a cabin in 1849 and was soon joined by other settlers from Salt Lake, namely Edward Phillips, John Green, and William Kay.

Although settlement began in the 1847, the name of Kaysville connects with the fact that in 1851 William Kay was made the bishop in the vicinity by Brigham Young and Heber C. Kimball.

After the move south in 1858 (see Utah War), there was an attempt to rename the community "Freedom", but Brigham Young convinced the residents to retain the old name.

In 1868 Kaysville became the first city incorporated in Davis County.

An adobe meetinghouse was built in 1863. It was replaced by the Kaysville Tabernacle in 1914. In 1930 Kaysville had 992 people. Of those residents who were Latter-day Saints, they all were in the Kaysville Ward which also covered most of the rest of the Kaysville Precinct.

In 1977 United Airlines Flight 2860 crashed near Kaysville.

By 2008 there were seven Mormon stakes (similar to a diocese) in Kaysville.

In November 2009, Kaysville voters elected Steve Hiatt as Kaysville City's 38th mayor and the youngest mayor in Utah. He was sworn in on January 4, 2010. He was re-elected for a second four-year term in November 2013.

The current mayor, Tamara Tran, won the 2021 election with 59.95 percent of the popular vote over Jay Welk.

Kaysville is bordered by the city of Layton to the north, Fruit Heights to the east, and Farmington, the county seat, to the south. According to the United States Census Bureau, Kaysville has a total area of 10.5 square miles (27.2 km), of which 0.04 square miles (0.1 km), or 0.48%, is water.

Historical population

Census	Pop.	Note	%±
1890	548		—
1900	1,708		211.7%
1910	887		−48.1%
1920	809		−8.8%
1930	992		22.6%
1940	1,211		22.1%
1950	1,898		56.7%
1960	3,608		90.1%
1970	6,192		71.6%
1980	10,331		66.8%
1990	13,961		35.1%
2000	20,351		45.8%
2010	27,368		34.5%
2020	32,945		20.4%
2023 (est.)	32,941		0.0%
U.S. Decennial Census

According to the 2020 United States census and 2020 American Community Survey, there were 32,945 people in Kaysville with a population density of 3,135.3 people per square mile (1,210.5/km). Among non-Hispanic or Latino people, the racial makeup was 29,364 (89.1%) White, 178 (0.5%) African American, 83 (0.3%) Native American, 321 (1.0%) Asian, 114 (0.3%) Pacific Islander, 76 (0.2%) from other races, and 871 (2.6%) from two or more races. 1,938 (5.9%) people were Hispanic or Latino.

There were 16,469 (49.99%) males and 16,476 (50.01%) females, and the population distribution by age was 12,060 (36.6%) under the age of 18, 17,684 (53.7%) from 18 to 64, and 3,201 (9.7%) who were at least 65 years old. The median age was 29.9 years.

There were 8,958 households in Kaysville with an average size of 3.68 of which 7,844 (87.6%) were families and 1,114 (12.4%) were non-families. Among all families, 6,895 (77.0%) were married couples, 275 (3.1%) were male householders with no spouse, and 674 (7.5%) were female householders with no spouse. Among all non-families, 959 (10.7%) were a single person living alone and 155 (1.7%) were two or more people living together. 4,685 (52.3%) of all households had children under the age of 18. 7,754 (86.6%) of households were owner-occupied while 1,204 (13.4%) were renter-occupied.

The median income for a Kaysville household was $103,730 and the median family income was $111,903, with a per-capita income of $34,514. The median income for males that were full-time employees was $81,057 and for females $44,205. 3.2% of the population and 3.4% of families were below the poverty line.

In terms of education attainment, out of the 17,847 people in Kaysville 25 years or older, 248 (1.4%) had not completed high school, 2,299 (12.9%) had a high school diploma or equivalency, 6,410 (35.9%) had some college or associate degree, 6,170 (34.6%) had a bachelor's degree, and 2,720 (15.2%) had a graduate or professional degree.

• Cherry Hill (amusement park)
• Davis High School
• House where John Taylor died
• LeConte Stewart Artist Museum
• Utah Botanical Center
• Kay's Cross

• Rob Bishop, congressman
• Henry H. Blood, seventh governor of Utah
• James Cowser, former NFL player
• Jaxson Dart, college football player
• Floyd Gottfredson, cartoonist in the Will Eisner Award Hall of Fame
• Jared Ward, Olympic marathon runner
• Mikayla Cluff, professional soccer player

• (1994) "Kaysville" article in the Utah History Encyclopedia.

• City of Kaysville official website