Montville was incorporated as a township by an Act of the New Jersey Legislature on April 11, 1867, from portions of Pequannock Township.
Montville was ranked 13th in Money magazine's 2007 ranking of the "Best Places to Live", the highest-ranked place in New Jersey.
Corporations headquartered in Montville include staffing firm Search EDP Inc. and pharmaceutical company Bayer Healthcare Pharmaceuticals.
Towaco and Pine Brook are the two unincorporated areas located within Montville Township.
There were 7,380 households out of which 37.4% had children under the age of 18 living with them, 71.0% were married couples living together, 6.4% had a female householder with no husband present, and 20.5% were non-families. 16.6% of all households were made up of individuals and 5.7% had someone living alone who was 65 years of age or older. The average household size was 2.80 and the average family size was 3.17.
In the township the population was spread out with 25.2% under the age of 18, 5.5% from 18 to 24, 30.6% from 25 to 44, 28.0% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 94.7 males. For every 100 females age 18 and over, there were 91.9 males.
The median income for a household in the township was $94,557, and the median income for a family was $105,394. Males had a median income of $71,356 versus $45,427 for females. The per capita income for the township was $43,341. About 2.6% of families and 3.8% of the population were below the poverty line, including 4.4% of those under age 18 and 6.3% of those age 65 or over.
As of 2008, Montville's Township Committee consists of Mayor Deborah Nielson (term ends December 31, 2008), Deputy Mayor James Sandham, Jr. (2008), Jean Bader (2009), Tim Braden (2010) and Art Daughtry (2010).
A Charter Study Commission was approved by the voters on November 8, 2005, to investigate possible changes to Montville's form of government. The commission voted 4-1 against making any changes.
During the American Revolutionary War, Montville Township was on a major military route from Morristown to the Hudson River. General George Washington's troops often took this route and Washington stayed in Montville Township (Towaco section) in June 1780. The French troops under the leadership of General Rochambeau also passed through Montville Township on their way to the War's final victory at Yorktown, Virginia. It took them four days as they encompassed 5,000 soldiers, 2,000 horses, 500 oxen, possibly 900 cattle, artillery, boats, followers, etc.
Montville was officially named with specific boundaries April 1800. The name came from the Mandeville Inn, which was pronounced Mondeveil by the Dutch. That name was corrupted to Montville. The Montville Inn was, up until July 2006 located at the site of the pre-Revolutionary War Mandeville Inn.
The construction of the Morris Canal in this area was completed in 1828, bringing commercial navigation to the Montville/Towaco area. The mid-19th century saw the development of two smaller village centers set apart from Montville: Pine Brook, a fertile agricultural area in the Township’s southern end, and Towaco, situated on the Morris Canal.
The Montville Township School District serves public school students in kindergarten through twelfth grade. Schools in the district (with 2005-06 enrollment data from the National Center for Education Statistics) are five Kindergarten to fifth grade elementary schools — Cedar Hill (386 students), Hilldale (385), Valley View (453), William Mason (375) and Woodmont (365) — Robert R. Lazar Middle School for grades 6 - 8 as of the beginning of the 2005-2006 school year (1,000), and Montville High School for grades 9 - 12 (1,158). MTHS's mascot is the Mustang and motto is "You can't hide from Mustang Pride!"
Montville Extended Day Learning Center is available at all the elementary schools in the district.
Private Schools include Trinity Christian School. St. Pius X School is a Catholic school operated under the auspices of the Roman Catholic Diocese of Paterson.