Union Center is a village in Juneau County, Wisconsin, United States, along the Baraboo River.

[7] According to the United States Census Bureau, the village has a total area of 0.75 square miles (1.94 km2), all of it land.

There were 109 housing units at an average density of 145.3 per square mile (56.1/km2).

32.6% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.

31.9% of all households were made up of individuals, and 18.1% had someone living alone who was 65 years of age or older.

About 5.7% of families and 8.3% of the population were below the poverty line, including 6.7% of those under the age of eighteen and none of those 65 or over.