Libby is a city in and the county seat of Lincoln County, Montana. The population was 2,628 at the 2010 census.
Libby is located along U.S. Route 2.
According to the United States Census Bureau, the city has a total area of 1.95 square miles (5.05 km), of which 1.91 square miles (4.95 km) is land and 0.04 square miles (0.10 km) is water. Located in the Kootenai National Forest, between the Cabinet Mountains to the south and the Purcell Mountains to the north, the town lies in the heart of the Kootenai Valley along the Kootenai River, and downstream from the Libby Dam. Libby is at an elevation of 2,096 feet (640 m) above sea level.
Libby experiences a continental climate (Köppen Dfb).
As of the census of 2010, there were 2,628 people, 1,252 households, and 647 families residing in the city. The population density was 1,375.9 inhabitants per square mile (531.2/km). There were 1,416 housing units at an average density of 741.4 per square mile (286.3/km). The racial makeup of the city was 95.9% White, 0.1% African American, 1.1% Native American, 0.4% Asian, 0.3% from other races, and 2.1% from two or more races. Hispanic or Latino of any race were 2.5% of the population.
There were 1,252 households of which 23.2% had children under the age of 18 living with them, 36.7% were married couples living together, 11.1% had a female householder with no husband present, 3.9% had a male householder with no wife present, and 48.3% were non-families. 41.9% of all households were made up of individuals and 19.1% had someone living alone who was 65 years of age or older. The average household size was 2.02 and the average family size was 2.71.
The median age in the city was 45.8 years. 19.1% of residents were under the age of 18; 8.4% were between the ages of 18 and 24; 21.4% were from 25 to 44; 28.6% were from 45 to 64; and 22.5% were 65 years of age or older. The gender makeup of the city was 48.6% male and 51.4% female.