Grundy Center is part of the Waterloo–Cedar Falls Metropolitan Statistical Area.

Often simply called "Grundy", the town has three public education centers.

Located just south of the Liberty Park is the city swimming pool, that is open only in the summer months.

The Herbert Quick School House is a historic building in Grundy Center, located within Orion city park.

[8] In 2023, Grundy Center Freshman Judd Jirovsky made history in Iowa High School golf with an impressive state performance.

In addition to Jirovsky's individual victory, the Grundy Center boys' team also took home the Class 2A State title, with a record-breaking score of 597.

This marks the fourth State team title for the Spartans in school history.

[9] Also in 2023, the girls' golf team from Grundy Center won the 15th overall state championship, with Abbie Lindeman taking the individual medalist title.

[11] According to the United States Census Bureau, the city has a total area of 2.53 square miles (6.55 km2), all land.

As of the census of 2020,[16] there were 2,796 people, 1,201 households, and 757 families residing in the city.

There were 1,281 housing units at an average density of 498.5 per square mile (192.5/km2).

The racial makup of the city was 98.6% White, 0.2% African American, 0.1% Asian, 0.1% Pacific Islander, and 1.0% from two or more races.

The racial makup of the city was 99.23% White, 0.04% African American, 0.15% Asian, and 0.58% from two or more races.