Windsor, Mercer County, Illinois  Windsor, also known as New Windsor, is a village in Rivoli Township, Mercer County, Illinois, United States. The population was 748 at the 2010 census, up from 720 in 2000. The official name is the Village of Windsor, but New Windsor is also used by the village such as the New Windsor Fire Department. The US Postal service shows New Windsor, Illinois as 61465 but the US Census Bureau calls it Windsor Village to differentiate it with the city of Windsor and Windsor Township, both in Shelby County. New Windsor is located at (41.201643, -90.443996). According to the 2010 census, the village has a total area of , all land. As of the census of 2000, there were 720 people, 307 households, and 217 families residing in the village. The population density was 1,628.5 people per square mile (631.8/km²). There were 335 housing units at an average density of 757.7 per square mile (294.0/km²). The racial makeup of the village was 98.75% White, 0.28% Native American, 0.28% Asian, and 0.69% from two or more races. Hispanic or Latino of any race were 2.50% of the population. There were 307 households out of which 28.7% had children under the age of 18 living with them, 59.6% were married couples living together, 6.8% had a female householder with no husband present, and 29.3% were non-families. 28.0% of all households were made up of individuals and 18.9% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.82. In the village, the population was spread out with 22.1% under the age of 18, 8.9% from 18 to 24, 24.4% from 25 to 44, 25.4% from 45 to 64, and 19.2% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 97.3 males. For every 100 females age 18 and over, there were 92.1 males. The median income for a household in the village was $37,500, and the median income for a family was $41,094. Males had a median income of $30,556 versus $18,594 for females.