In theNebraska license plate system, Lancaster County was represented by theprefix 2 (it had the second-largest number of vehicles registered in the state when the license plate system was established in 1922). In 2002, the state discontinued the 1922 system in Lancaster,Douglas andSarpy counties.
According to theUS Census Bureau, the county has a total area of 846 square miles (2,190 km2), of which 838 square miles (2,170 km2) is land and 8.8 square miles (23 km2) (1.0%) is water.[3]
There were 99,187 households, out of which 30.30% had children under the age of 18 living with them, 48.80% weremarried couples living together, 9.10% had a female householder with no husband present, and 38.80% were non-families. 29.10% of all households were made up of individuals, and 8.30% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 3.00.
The county population contained 23.50% under the age of 18, 15.40% from 18 to 24, 30.40% from 25 to 44, 20.30% from 45 to 64, and 10.40% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 99.80 males. For every 100 females age 18 and over, there were 98.50 males.
The median income for a household in the county was $41,850, and the median income for a family was $53,676. Males had a median income of $34,720 versus $25,614 for females. Theper capita income for the county was $21,265. About 5.50% of families and 9.50% of the population were below thepoverty line, including 9.90% of those under age 18 and 6.10% of those age 65 or over.
Lancaster County is divided into the following census divisions called precincts, defined by the boundaries of the originaltownships,[21] except for the City of Lincoln.
Lancaster County has historically been somewhat conservative for an urban county. In the last 30 national elections, Lancaster County selected the Republican Party candidate 78% of the time. However, it has become more competitive in recent years, largely due to the influence of Lincoln and the University of Nebraska. Since 1988, the margin in the county has been 10 points or less all but once. In 2008,Barack Obama won a narrow majority in Lancaster County, becoming the first Democrat to carry the county since 1964, and only the second since 1936. RepublicanDonald Trump never won the county in all three of his runs.
As of January 2025, Republicans maintain a relative advantage in party registration in the county.[22]