North Liberty is a town in Liberty Township, St. Joseph County, in the U.S. state of Indiana. The population was 1,896 at the 2010 Census. North Liberty is part of the South Bend–Mishawaka, IN-MI, Metropolitan Statistical Area.

North Liberty was laid out in 1836 or 1837 (sources differ). The North Liberty post office has been in operation since 1847.

The North Liberty Historic District and North Liberty Park are listed on the National Register of Historic Places.

According to the 2010 census, North Liberty has a total area of 0.98 square miles (2.54 km), all land.

Historical population

Census	Pop.	Note	%±
1870	223		—
1880	346		55.2%
1900	504		—
1910	681		35.1%
1920	684		0.4%
1930	823		20.3%
1940	978		18.8%
1950	1,165		19.1%
1960	1,241		6.5%
1970	1,259		1.5%
1980	1,211		−3.8%
1990	1,366		12.8%
2000	1,402		2.6%
2010	1,896		35.2%
2020	1,623		−14.4%
U.S. Decennial Census

As of the census of 2010, there were 1,896 people, 714 households, and 523 families living in the town. The population density was 1,934.7 inhabitants per square mile (747.0/km). There were 762 housing units at an average density of 777.6 per square mile (300.2/km). The racial makeup of the town was 96.2% White, 0.5% African American, 0.4% Native American, 0.4% Asian, 0.2% from other races, and 2.4% from two or more races. Hispanic or Latino of any race were 2.5% of the population.

There were 714 households, of which 45.0% had children under the age of 18 living with them, 44.8% were married couples living together, 23.4% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 26.8% were non-families. 22.8% of all households were made up of individuals, and 10.6% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.12.

The median age in the town was 30.6 years. 32.8% of residents were under the age of 18; 10.5% were between the ages of 18 and 24; 26.2% were from 25 to 44; 19.5% were from 45 to 64; and 10.9% were 65 years of age or older. The gender makeup of the town was 46.7% male and 53.3% female.

As of the census of 2000, there were 1,402 people, 559 households, and 399 families living in the town. The population density was 1,872.6 inhabitants per square mile (723.0/km). There were 588 housing units at an average density of 785.4 per square mile (303.2/km). The racial makeup of the town was 97.65% White, 0.43% African American, 0.21% Native American, 0.29% Pacific Islander, 0.29% from other races, and 1.14% from two or more races. Hispanic or Latino of any race were 0.71% of the population.

There were 559 households, out of which 39.0% had children under the age of 18 living with them, 49.2% were married couples living together, 18.2% had a female householder with no husband present, and 28.6% were non-families. 25.9% of all households were made up of individuals, and 13.1% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 3.00.

In the town, the population was spread out, with 30.3% under the age of 18, 8.0% from 18 to 24, 28.7% from 25 to 44, 18.8% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 92.3 males. For every 100 females age 18 and over, there were 87.5 males.

The median income for a household in the town was $34,850, and the median income for a family was $44,145. Males had a median income of $36,563 versus $23,281 for females. The per capita income for the town was $16,469. About 8.6% of families and 10.1% of the population were below the poverty line, including 16.0% of those under age 18 and 7.9% of those age 65 or over.

It is in the John Glenn School Corporation. The district operates North Liberty Elementary School. Its secondary schools, in Walkerton, are Urey Middle School and John Glenn High School.