As of the census of 2000, there were 2,233 people, 846 households, and 583 families residing in the village. The population density was 1,148.8 people per square mile (444.4/km²). There were 899 housing units at an average density of 462.5/sq mi (178.9/km²). The racial makeup of the village was 98.16% White, 0.36% Black or African American, 0.31% Native American, 0.13% Asian, 0.76% from other races, and 0.27% from two or more races. 2.55% of the population were Hispanic or Latino of any race.
There were 846 households out of which 39.6% had children under the age of 18 living with them, 55.2% were married couples living together, 9.7% had a female householder with no husband present, and 31.0% were non-families. 25.4% of all households were made up of individuals and 8.5% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.11.
In the village the population was spread out with 29.3% under the age of 18, 9.0% from 18 to 24, 32.6% from 25 to 44, 16.9% from 45 to 64, and 12.3% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 100.1 males. For every 100 females age 18 and over, there were 94.7 males.
The median income for a household in the village was $46,522, and the median income for a family was $52,600. Males had a median income of $36,440 versus $24,286 for females. The per capita income for the village was $20,256. About 3.1% of families and 3.9% of the population were below the poverty line, including 4.3% of those under age 18 and 6.7% of those age 65 or over.
Lomira is at the crossroads of State Highways 49, 67 and 175, and U.S. Route 41. The Wisconsin Central Limited Railroad provides industrials rail service for business and industry. Private air transportation is available in Fond du Lac, 10 miles north of the village. Commercial air transportation is offered in Appleton, 50 miles to the north; Milwaukee, 60 miles to the south; and Oshkosh, 30 miles to the north.