Livermore Falls is a town in Androscoggin County, Maine, United States. The population was 3,060 at the 2020 census. It is included in both the Lewiston-Auburn, Maine Metropolitan Statistical Area and the Lewiston-Auburn, Maine Metropolitan New England City and Town Area. High school students in Livermore Falls attend Spruce Mountain High School.

The area was once part of the Abenaki Indian territory called Rockemeka, meaning "great corn place". It would be granted by the General Court of Massachusetts in 1771 as Port Royal, awarded to heirs of veterans who served in the campaign against the Acadian capital of Port Royal in 1710. It was settled in 1786, then incorporated in 1795 as Livermore after Deacon Elijah Livermore, one of the first English settlers. The county line, determined by the Androscoggin River, divided the town. West of the river was Oxford County, and east was Kennebec County. Consequently, East Livermore (which encompassed a quarter of the original Port Royal grant) was set off and incorporated on March 1, 1844. It became part of Androscoggin County on March 31, 1854. On March 15, 1929, East Livermore was renamed Livermore Falls.

In the early 19th century, the region was predominantly farmland, with apple orchards and dairies supplying markets at Boston and Portland. It was noted for fine cattle. As the century progressed, gristmills, sawmills, logging and lumber became important industries, operated by water power from falls that drop 14 feet. With the arrival of the Androscoggin Railroad in 1852, Livermore Falls developed as a small mill town. Shoe factories and paper mills were established, including the Umbagog Pulp Company started by Hugh J. Chisholm. In 1897, the Third Bridge was built across the Androscoggin. It measured 800 feet in length, at that time the longest single-span bridge in New England.

According to the United States Census Bureau, the town has a total area of 20.42 square miles (52.89 km²), of which 19.68 square miles (50.97 km²) is land and 0.74 square miles (1.92 km²) is water. Livermore Falls is drained by the Androscoggin River.

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Livermore Falls has a humid continental climate, abbreviated "Dfb" on climate maps.

As of the census of 2010, there were 3,187 people, 1,316 households, and 809 families living in the town. The population density was 161.9 inhabitants per square mile (62.5/km²). There were 1,534 housing units at an average density of 77.9 per square mile (30.1/km²). The racial makeup of the town was 96.1% White, 0.3% African American, 0.3% Native American, 0.3% Asian, 0.9% from other races, and 2.1% from two or more races. Hispanic or Latino of any race were 2.2% of the population.

There were 1,316 households, of which 33.9% had children under the age of 18 living with them, 40.8% were married couples living together, 14.3% had a female householder with no husband present, 6.4% had a male householder with no wife present, and 38.5% were non-families. 31.1% of all households were made up of individuals, and 12.7% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.95.

The median age in the town was 38.1 years. 25.8% of residents were under the age of 18; 7.8% were between the ages of 18 and 24; 25.6% were from 25 to 44; 25.6% were from 45 to 64; and 15.2% were 65 years of age or older. The gender makeup of the town was 49.2% male and 50.8% female.