As of the census of 2000, there were 14,605 people, 5,263 households, and 3,747 families residing in the town. The population density was 1,469.1 people per square mile (567.3/km²). There were 5,348 housing units at an average density of 538.0/sq mi (207.7/km²). The racial makeup of the town was 97.48% White, 0.76% Black or African American, 0.12% Native American, 0.49% Asian, 0.01% Pacific Islander, 0.32% from other races, and 0.83% from two or more races. Hispanic or Latino of any race were 0.71% of the population.
There were 5,263 households out of which 34.8% had children under the age of 18 living with them, 57.0% were married couples living together, 10.2% had a female householder with no husband present, and 28.8% were non-families. 23.0% of all households were made up of individuals and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.29.
In the town the population was spread out with 25.6% under the age of 18, 7.4% from 18 to 24, 31.6% from 25 to 44, 23.2% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 95.4 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the town was $57,100, and the median income for a family was $68,826. Males had a median income of $44,151 versus $30,923 for females. The per capita income for the town was $23,380. About 2.1% of families and 3.6% of the population were below the poverty line, including 4.1% of those under age 18 and 7.2% of those age 65 or over.
Statistically speaking, Abington is the 125th largest community by population in the Commonwealth, and ranks 71st by population density. Its population is lower than the population average but above the median; the population density is above the average.
There are two main north-south routes through town, Route 18 and Route 58, the latter terminating at the former just a half-mile north of the town line. Route 123 and Route 139 run east to west through the town, with Route 139 being the more northern route. There is no freeway access to town; the town is located between Route 24 and Route 3.
The former Old Colony Railroad line runs through the eastern part of town, and is currently used as a part of the Kingston-Route 3 route of the MBTA's commuter rail line. There is a stop in Abington, just southwest of the intersection of Routes 123 and 58. A spur off the line formerly went into the town of Rockland; that spur is now abandoned. There is no air service in the town; the nearest national and international air service can be found at Logan International Airport in Boston.