According to the United States Census Bureau, the city has a total area of 3.5 square miles (9.1 km2), all land.

[7] As of the 2020 United States census, there were 1,825 people, 917 households, and 603 families residing in the city.

At the 2010 census there were 1,988 people, 940 households, and 579 families living in the city.

There were 1,048 housing units at an average density of 297.5 per square mile (114.9/km2).

Linden is served by the Linden-Kildare Consolidated Independent School District.