The population was 3,941 at the 2010 census.
Lansford's first school was opened in 1847 on Abbott Street. Lansford's first church, the Welsh Congregational, was built in 1850 and still stands today on West Abbott Street.
The old No. 9 Mine and Museum in Lansford, a deep mine which operated from 1855 to 1972, is now open as a tourist attraction offering tours of the mine and a wealth of information on local mining history. A museumoccupying the mine's former Wash Shanty building on the site displays a large collection of mining artifacts.
One of the local mine bosses, John P. Jones, was murdered in Lansford, reportedly in connection with labor union strife, attributed to members of a secret society known as the Molly Maguires, many of whom were put on trial and hanged in Carbon and Schuylkill Counties during the mid- to late 1870s.
Lansford was the home of the first Commercial Cable Television system in the United States.
The Lansford Historic District was added to the National Register of Historic Places in 2012.
According to the United States Census Bureau, the borough has a total area of 1.6 square miles (4.1 km2), all of it land. The town shares the border of Carbon and Schuylkill County with the abutting neighboring community of Coaldale, which is de facto, a suburban bedroom neighborhood. Lansford is 1 mile north of Summit Hill (the initial Anthracite deposits mined by the Lehigh Coal Company in 1780s.), and 10 miles west of Lehighton and 6 miles northeast of Tamaqua. Lansford's elevation is 1145 feet above sea level. It is also 5 miles northeast of Tamaqua, 27 miles northwest of Allentown, and 9 miles south of Hazleton. It is located on the northwestern fringe of the Lehigh Valley, and is at the southern end of the Coal Region and the Poconos.
Lansford sits on the north slope of Pisgah Mountain above and along the south bank of the Panther Creek tributary of the Little Schuylkill River athwart US-209 west of Jim Thorpe, Nesquehoning and the eastern extent of the Lehigh-Schuylkill drainage divide, down slope and below historic Summit Hill and east of abutting Coaldale and Tamaqua, Pennsylvania, both farther downstream and west. Nesquehoning Mountain dominates the north bank across the Panther Creek, and the rich coal mines of the valley shipped coal through the 3,800 feet (1,158.2 m) long Hauto Tunnel of the Central Railroad of New Jersey (CNJ) competing for the rich trade with New York City and Philadelphia.
As of the census of 2000, there were 4,230 people, 1,878 households, and 1,098 families residing in the borough. The population density was 2,710.0 people per square mile (1,046.9/km²). There were 2,228 housing units at an average density of 1,427.4 per square mile (551.4/km²). The racial makeup of the borough was 98.18% White, 0.35% African American, 0.07% Native American, 0.31% Asian, 0.07% Pacific Islander, 0.28% from other races, and 0.73% from two or more races. Hispanic or Latino people of any race were 1.42% of the population.
There were 1,878 households, out of which 24.6% had children under the age of 18 living with them, 38.4% were married couplesliving together, 14.9% had a female householder with no husband present, and 41.5% were non-families. 37.7% of all households were made up of individuals, and 23.4% had someone living alone who was 65 years of age or older. The average household size was 2.23 and the average family size was 2.92.
In the borough the population was spread out, with 22.5% under the age of 18, 7.3% from 18 to 24, 25.6% from 25 to 44, 19.1% from 45 to 64, and 25.5% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 84.1 males. For every 100 females age 18 and over, there were 80.2 males.
The median income for a household in the borough was $27,478, and the median income for a family was $37,773. Males had a median income of $30,405 versus $22,255 for females. The per capita income for the borough was $14,347. About 10.9% of families and 14.3% of the population were below the poverty line, including 20.5% of those under age 18 and 10.4% of those age 65 or over.