[5] Population growth accelerated in the 1960s, and the Iowa City Community School District opened Penn Elementary there in 1961.

In 1984, in response to the population growth, the North Liberty Community Library [1] was founded, and Penn Meadows Park, the city's largest, was opened.

In 2007, the population was estimated to be 10,982, making North Liberty the second fastest-growing city in Iowa.

[7] According to the United States Census Bureau, the city has a total area of 7.83 square miles (20.28 km2), all land.

Drivers on I-380 experience an abrupt transition from the muted topography of the Iowan surface to the rolling hills of the Southern Iowa drift plain, four miles south of North Liberty.

[citation needed] As of the census of 2020,[11] there were 20,479 people, 7,897 households, and 5,036 families residing in the city.

North Liberty is governed by a five member city council and a non-voting mayor, each serving a four-year term.

[14] A majority of North Liberty residents live within the boundaries of the Iowa City Community School District, while the area west of Jones Boulevard (and the Deerfield Subdivision) belongs to the Clear Creek–Amana Community School District.

According to the study, the number of advanced-degree holding residents has a strong correlation with several social goods, including "a good number of high paying jobs in the area, an excellent schooling system to educate the next generation, nearby higher education institutions, and more.

"[16] The sewage from the city is treated at a modern and sophisticated treatment plant using Membrane Bio-Reactor(MBR) technology followed by UV sterilization.

It is designed to be able to discharge more than 2 million gallons of high-quality effluent to Muddy Creek each day.

The radio telescope located northeast of North Liberty (41°46′17.13″N 91°34′26.88″W / 41.7714250°N 91.5741333°W / 41.7714250; -91.5741333; designation "NL") on Mehaffey Bridge Road is one of ten dishes comprising the Very Long Baseline Array (VLBA).