2020 census As of the
2020 census, Le Sueur had a population of 4,213. The median age was 39.3 years. 24.8% of residents were under the age of 18 and 18.7% of residents were 65 years of age or older. For every 100 females there were 95.5 males, and for every 100 females age 18 and over there were 94.5 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. There were 1,699 households in Le Sueur, of which 31.3% had children under the age of 18 living in them. Of all households, 43.6% were married-couple households, 19.5% were households with a male householder and no spouse or partner present, and 27.4% were households with a female householder and no spouse or partner present. About 31.4% of all households were made up of individuals and 11.7% had someone living alone who was 65 years of age or older. There were 1,827 housing units, of which 7.0% were vacant. The homeowner vacancy rate was 1.3% and the rental vacancy rate was 8.7%.
2010 census As of the
census of 2010, 4,058 people, 1,640 households, and 1,058 families were residing in the city. The
population density was . The 1,782 housing units had an average density of . The
racial makeup of the city was 90.6% White, 0.8% African American, 0.3% Native American, 0.8% Asian, 5.9% from other races, and 1.5% from two or more races. Hispanics or Latinos of any race were 11.9% of the population. Of the 1,640 households, 32.7% had children under 18 living with them, 48.5% were married couples living together, 11.6% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 35.5% were not families. About 29.3% of all households were made up of individuals, and 12.4% had someone living alone who was 65 or older. The average household size was 2.41 and the average family size was 2.97. The median age in the city was 37.9 years; the age distribution was 25.0% of under 18; 8.2% from 18 to 24; 25.8% from 25 to 44; 24.2% from 45 to 64; and 16.6% were 65 or older. The gender makeup of the city was 48.4% male and 51.6% female.
2000 census As of the 2000
census, 3,922 people, 1,545 households, and 1,025 families were living in the city. The population density was . The 1,589 housing units had an average density of . The racial makeup of the city was 92.48% White, 0.25% African American, 0.15% Native American, 0.28% Asian, 0.08% Pacific Islander, 5.86% from
other races, and 0.89% from two or more races. Hispanics or Latinos of any race were 9.64% of the population. Of the 1,545 households, 33.3% had children under 18 living with them, 53.3% were married couples living together, 9.4% had a female householder with no husband present, and 33.6% were not families. About 29.3% of all households were made up of individuals, and 14.6% had someone living alone who was 65 or older. The average household size was 2.48 and the average family size was 3.07. In the city, the age distribution was 27.8% under 18, 7.8% from 18 to 24, 26.7% from 25 to 44, 20.5% from 45 to 64, and 17.2% who were 65 or older. The median age was 37 years. For every 100 females, there were 93.5 males. For every 100 females 18 and over, there were 88.2 males. The median income for a household in the city was $42,372, and for a family was $53,362. Males had a median income of $35,810 versus $24,359 for females. The
per capita income for the city was $21,605. About 5.8% of families and 8.8% of the population were below the
poverty line, including 12.3% of those under 18 and 10.7% of those 65 or over. ==Economy==