As of the census of 2010, there were 6,049 people, divided into 2,509 total households, with 2,360 occupied households in the town. The racial makeup (population) of the town was 5,741 White, 95 African American, 2 Native American, 70 Asian, 2 Pacific Islander, 52 from other races, and 0.76% from two or more races. There are 300 Hispanic or Latino.
As of the census  of 2000, there were 5,246 people, 2,032 households, and 1,450 families residing in the town. The population density was 536.6 people per square mile (207.1/km²). There were 2,104 housing units at an average density of 215.2 per square mile (83.1/km²). The racial makeup of the town was 96.97% White, 0.72% African American, 0.08% Native American, 1.03% Asian, 0.04% Pacific Islander, 0.40% from other races, and 0.76% from two or more races. Hispanic or Latino of any race were 2.13% of the population.
There were 2,032 households out of which 34.1% had children under the age of 18 living with them, 58.2% were married couples living together, 9.5% had a female householder with no husband present, and 28.6% were non-families. 23.0% of all households were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.08.
In the town the population was spread out with 25.2% under the age of 18, 6.5% from 18 to 24, 35.1% from 25 to 44, 23.6% from 45 to 64, and 9.6% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 100.6 males. For every 100 females age 18 and over, there were 96.5 males.
The median income for a household in the town was $56,592, and the median income for a family was $62,461. Males had a median income of $41,696 versus $34,844 for females. The per capita income for the town was $25,285. About 4.2% of families and 5.9% of the population were below the poverty line, including 9.8% of those under age 18 and 4.6% of those age 65 or over.
Beacon Falls is home to Woodland Regional High School, which opened in 2001. Woodland is part of Regional School District #16 (Beacon Falls and Prospect), which also consists of Long River Middle School (P), Laurel Ledge Elementary School (BF), Community School (P), and Algonquin School (P).
 Connecticut State Data Center. (2011). Connecticut Town Population 2010 & 2000. Retrieved from http://ctsdc.uconn.edu/mashup/census_2010_pl_94_171_change_viewer.html.
 "Registration and Party Enrollment Statistics as of October 25, 2005" (PDF). Connecticut Secretary of State. Archived from the original on 2006-09-23. Retrieved 2006-10-02.