Northglenn is a Home Rule Municipality in Adams and Weld counties in the U.S. state of Colorado. As of the 2010 census the city's population was 35,789.
Northglenn is located at 39°53′51″N 104°58′55″W / 39.89750°N 104.98194°W (39.897418, -104.981891).
According to the United States Census Bureau, the city has a total area of 7.5 square miles (19.4 km2), of which 7.4 square miles (19.2 km2) is land and 0.077 square miles (0.2 km2), or 1.23%, is water.
As of the census of 2000, there were 31,575 people, 11,610 households, and 8,208 families residing in the city. The population density was 4,256.2 people per square mile (1,643.0/km²). There were 12,051 housing units at an average density of 1,624.4 per square mile (627.1/km²). The racial makeup of the city was 83.04% White, 1.52% African American, 1.14% Native American, 3.07% Asian, 0.15% Pacific Islander, 8.13% from other races, and 2.94% from two or more races. Hispanic or Latino of any race were 20.27% of the population.