|— Borough —|
|- Total||0.3 sq mi (0.7 km2)|
|Elevation||787 ft (240 m)|
|- Density||1,182.4/sq mi (464.8/km2)|
|Time zone||Eastern (EST)|
|- Summer (DST)||EDT (UTC)|
|Unionville Historic District|
|U.S. National Register of Historic Places|
|U.S. Historic District|
|Location:||U.S. Route 220 and Pennsylvania Route 504, Unionville|
|Area:||120 acres (49 ha)|
|Architectural style(s):||Mid 19th Century Revival, Italianate, Georgian|
|Added to NRHP:||May 30, 1979|
Unionville is a borough in Centre County, Pennsylvania, United States. It is part of the State College, Pennsylvania Metropolitan Statistical Area. As of the 2000 census, the borough had a total population of 313.
In 1979, the Unionville Historic District was listed on the National Register of Historic Places. The district, which includes virtually all of Unionville, was added to the Register for its high quality of preservation since before World War I. Nearly two hundred buildings in the borough qualified as contributing properties.
Unionville is located at .(40.90698, -77.87550)
As of the census of 2000, there were 313 people, 119 households, and 91 families residing in the borough. The population density was 1,182.4 people per square mile (464.8/km²). There were 127 housing units at an average density of 479.8/sq mi (188.6/km²). The racial makeup of the borough was 98.08% White, 0.32% Asian, 0.64% from other races, and 0.96% from two or more races. Hispanic or Latino of any race were 0.96% of the population.
There were 119 households out of which 32.8% had children under the age of 18 living with them, 66.4% were married couples living together, 9.2% had a female householder with no husband present, and 23.5% were non-families. 19.3% of all households were made up of individuals and 8.4% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 2.97.
In the borough the population was spread out with 25.2% under the age of 18, 6.4% from 18 to 24, 31.6% from 25 to 44, 23.6% from 45 to 64, and 13.1% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 87.4 males. For every 100 females age 18 and over, there were 87.2 males.
The median income for a household in the borough was $34,286, and the median income for a family was $39,250. Males had a median income of $28,125 versus $26,250 for females. The per capita income for the borough was $15,284. About 9.9% of families and 13.5% of the population were below the poverty line, including 19.5% of those under the age of 18 and 20.0% of those 65 and older.