2020 census As of the
2020 census, the county had a population of 59,235. The median age was 43.0 years; 22.1% of residents were under 18, and 21.8% were 65 or older. For every 100 females, there were 103.1 males, and for every 100 females 18 and over, there were 102.1 males 18 and over. About 55.4% of residents lived in urban areas, while 44.6% lived in rural areas. The racial makeup of the county was 75.7% White, 0.9% Black or African American, 2.3% American Indian and Alaska Native, 1.7% Asian, 0.3%
Native Hawaiian and Pacific Islander, 7.2% from some other race, and 12.0% from two or more races.
Hispanic or Latino residents of any race comprised 17.5% of the population. The population density was . There were 22,547 housing units at an average density of . The racial makeup of the county was 85.0% white, 2.5% American Indian, 1.4% Asian, 0.8% black or African American, 0.3% Pacific islander, 6.4% from other races, and 3.7% from two or more races. Those of Hispanic or Latino origin made up 14.8% of the population. Of the 19,808 households, 33.2% had children under 18 living with them, 55.3% were married couples living together, 10.2% had a female householder with no husband present, 28.6% were not families, and 22.1% were made up of individuals. The average household size was 2.61, and the average family size was 3.02. The median age was 40.9 years.
2000 census As of the 2000
census 34,501 people, 13,007 households, and 9,443 families were living in the county. The
population density was . The 14,279 housing units had an average density of . The
racial makeup of the county was 88.62% White, 0.65% African American, 2.45% Native American, 0.61% Asian, 0.14% Pacific Islander, 4.59% from other races, and 2.94% from two or more races. About 11.0% of the population were Hispanics or Latinos of any race. Of the 13,007 households, 33.2% had children under 18 living with them, 58.4% were married couples living together, 9.1% had a female householder with no husband present, and 27.4% were not families. About 21.4% of all households were made up of individuals, and 8.3% had someone living alone who was 65 or older. The average household size was 2.61 and the average family size was 3.02. In the county, the age distribution was 27.1% under 18, 6.6% from 18 to 24, 27.3% from 25 to 44, 25.2% from 45 to 64, and 13.7% who were 65 or older. The median age was 38 years. For every 100 females, there were 102.5 males. For every 100 females 18 and over, there were 100.0 males. The median income for a household in the county was $40,699 and for a family was $44,887. Males had a median income of $34,034 versus $25,914 for females. The
per capita income for the county was $18,543. About 7.2% of families and 10.4% of the population were below the
poverty line, including 14.1% of those under 18 and 7.1% of those age 65 or over. From 2000 until 2008, Lyon County was one of the fastest-growing counties in the United States. However, its growth rate collapsed during 2008. ==Communities==