Sigel is a town in Wood County, Wisconsin, United States. The population was 1,130 at the 2000 census. The unincorporated community of Eight Corners is located in the town.
As of the census of 2000, there were 1,130 people, 410 households, and 334 families residing in the town. The population density was 31.8 people per square mile (12.3/km²). There were 428 housing units at an average density of 12.0 per square mile (4.7/km²). The racial makeup of the town was 99.29% White, 0.09% African American, 0.27% Native American, and 0.35% from two or more races. Hispanic or Latino of any race were 0.18% of the population.
There were 410 households out of which 31.0% had children under the age of 18 living with them, 74.9% were married couples living together, 4.6% had a female householder with no husband present, and 18.3% were non-families. 14.4% of all households were made up of individuals and 5.1% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.04.
In the town the population was spread out with 24.2% under the age of 18, 7.3% from 18 to 24, 26.2% from 25 to 44, 28.0% from 45 to 64, and 14.4% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 107.7 males. For every 100 females age 18 and over, there were 109.0 males.
The median income for a household in the town was $49,226, and the median income for a family was $53,542. Males had a median income of $37,778 versus $26,429 for females. The per capita income for the town was $19,676. About 1.2% of families and 2.0% of the population were below the poverty line, including 0.8% of those under age 18 and 4.1% of those age 65 or over.