Paul Revere's son attended Westford Academy and a bell cast by Revere graces its lobby today. A weather vane made by Paul Revere sits atop the Abbot Elementary school.
By the end of the American Civil War, as roads and transportation improved, Westford began to serve as a residential suburb for the factories of Lowell, becoming one of the earliest notable examples of suburban sprawl. Throughout the 20th century (and with the invention of the automobile), Westford progressively grew, continuing to serve as residential housing for the industries of Lowell, and later, Boston.
In the 1960s, the town was home to one of the research sites supporting Project West Ford.
By the 1970s, with the advent of the 128Technology Belt, Westford began to act as a suburb for high-tech firms in Burlington, Woburn, and other areas, and later became a center of technology itself.
As of the 2010 census, there were 7,498 households out of which 45.3% had children under the age of 18 living with them, 72.5% were married couples living together, 7.3% had a female head of household, and 17.8% were other families. The average household size was 2.93 and the average family size was 3.27.
In the town, the population was spread out with 31.8% under the age of 18, 4.2% from 18 to 24, 32.8% from 25 to 44, 23.9% from 45 to 64, and 7.2% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 99.0 males. For every 100 females age 18 and over, there were 95.4 males.
The median income for a household in the town was $121,136, and the median income for a family was $137,230. The per capita income for the town was $48,951. About 1.3% of families and 1.7% of the population were below the poverty line, including 2.2% of those under age 18 and 1.0% of those age 65 or over.
Westford Public Schools
The Superintendent of Westford's Public Schools is Everett "Bill" Olsen, who has held that role since 1986.  The Assistant Superintendent is Kerry Clery. 
In August, the Westford Rotary Club hosts the Blues & Brews Festival as well as the Pig & Pepper Festival at the Nashoba Valley Ski Area, featuring top blues bands and many local beers to sample.
In October, the Westford Education Foundation sponsors the Family Fun Run, Westford FunFest holds a Fall Festival at Kimball Farms, and the Nashoba Valley Ski Resort runs the Witch's Woods Halloween Screampark.
In December, First Parish Church hosts the Westford Greens Sale, Westford Academy has its annual Holiday Bazaar, Westford FunFest holds the Festival of Trees, Wreaths and Gingerbread Creations and Breakfast with Santa.
In December, Westford's United Methodist Church holds an outdoor Live Nativity overlooking the Stony Brook Reservoir pond, including farm animals, music & bonfire [www.umcw.org]
In December, the Rabbi from Chabad Nashoba Valley lights the candles of the 9 foot Menorah during Chanukah. One of the evenings includes music and dancing after the lighting. The menorah is displayed on the town common.
There is a celebratory parade of where the graduated seniors of Westford Academy make trips around the middle schools as a tribute to their experience with the teachers at each place and then ride through town center.
^"1950 Census of Population"(PDF). Bureau of the Census. 1952. Section 6, Pages 21-10 and 21-11, Massachusetts Table 6. Population of Counties by Minor Civil Divisions: 1930 to 1950. Retrieved July 12, 2011.
^"1920 Census of Population"(PDF). Bureau of the Census. Number of Inhabitants, by Counties and Minor Civil Divisions. Pages 21-5 through 21-7. Massachusetts Table 2. Population of Counties by Minor Civil Divisions: 1920, 1910, and 1920. Retrieved July 12, 2011.
^"1890 Census of the Population"(PDF). Department of the Interior, Census Office. Pages 179 through 182. Massachusetts Table 5. Population of States and Territories by Minor Civil Divisions: 1880 and 1890. Retrieved July 12, 2011.
^"1870 Census of the Population"(PDF). Department of the Interior, Census Office. 1872. Pages 217 through 220. Table IX. Population of Minor Civil Divisions, &c. Massachusetts. Retrieved July 12, 2011.
^"1860 Census"(PDF). Department of the Interior, Census Office. 1864. Pages 220 through 226. State of Massachusetts Table No. 3. Populations of Cities, Towns, &c. Retrieved July 12, 2011.
^"1850 Census"(PDF). Department of the Interior, Census Office. 1854. Pages 338 through 393. Populations of Cities, Towns, &c. Retrieved July 12, 2011.