West Newbury is well known for it's many hills; Pipestave Hill, (Which includes coveted horseback riding trails and well-kept soccer fields), Break's Hill, Ilsey Hill, Long Hill, (Upon which Long Hill Farm is situated), and Meetinghouse Hill.
As of the census of 2006, there were 4,450 people, 1,392 households, and 1,183 families residing in the town. The population density is 306.9 people per square mile (118.5/km²). There were 1,423 housing units at an average density of 105.3/sq mi (40.6/km²). The racial makeup of the town was 98.48% White, 0.19% African American, 0.02% Native American, 0.53% Asian, 0.00% Pacific Islander, 0.36% from other races, and 0.41% from two or more races. Hispanic or Latino of any race were 0.65% of the population.
There were 1,392 households out of which 46.6% have children under the age of 18 living with them, 76.8% are married couples living together, 6.2% have a female householder with no husband present, and 15.0% are non-families. 11.9% of all households are made up of individuals and 5.2% have someone living alone who is 65 years of age or older. The average household size is 2.98 and the average family size is 3.25.
In the town the population was spread out with 30.0% under the age of 18, 4.3% from 18 to 24, 27.0% from 25 to 44, 29.9% from 45 to 64, and 8.8% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 99.5 males. For every 100 females age 18 and over, there were 93.9 males.
The median income for a household in the town was $102,828, and the median income for a family was $120,050. Males had a median income of $100,670 versus $80,189 for females. The per capita income for the town was $35,323. About 2.8% of families and 3.8% of the population were below the poverty line, including 3.8% of those under the age of 18 and 9.8% of those 65 and older.
Property values in West Newbury are among the highest in the state; particularly the Newbury-Newburyport-West Newbury area, which are towns in Essex County, one of the single most expensive counties in the state.