How many registered voters are in Jefferson?

Jefferson, in Morris County, has 16,413 registered voters in New Jersey's 11th Congressional District.

What share of Jefferson voters are unaffiliated?

31% of registered voters in Jefferson are unaffiliated, meaning they have not declared a party. Unaffiliated voters are the swing pool that decides close races in this district.

Which party leads voter registration in Jefferson?

Republican registrations are the largest bloc in Jefferson, ahead by 13.5 points.

Town Profile

Jefferson

Morris County · Jefferson Township, in New Jersey's 11th Congressional District

Republican plurality Registration as of 2026-06-04

16,413

Registered voters

31%

Unaffiliated

Republican

Largest bloc (+13.5 pts)

Latest from Jefferson

Jefferson

Jefferson Township Hospital Tops NJ Ambulatory Care Visits; Van Drew Makes DV Claims

Local hospital leads state rankings in patient volume while a congressional hearing features allegations against Gabriela Soto.

July 24, 2026 · 2 sources

Jefferson

Jefferson Washington Township Hospital leads NJ ambulatory care visits

NJBIZ ranked Jefferson Washington Township Hospital as the top New Jersey facility for patient visits in its 2025 report.

July 18, 2026 · 2 sources

Jefferson

Jefferson Township named among top municipal primaries to watch

New Jersey Globe lists Jefferson alongside other towns as a key race for Tuesday's elections.

July 12, 2026 · 2 sources

Jefferson

GOP mayoral primary pits Jefferson incumbent against former state lawmaker

Mayor Eric Wilsusen faces challenger Christian Barranco, a former Assemblyman running with the slogan 'Save Jefferson.'

July 6, 2026 · 2 sources

Party registration

23.2%44.5%31%

Affiliation	Voters	Share
Democrat	3,807	23.2%
Republican	7,311	44.5%
Unaffiliated	5,096	31%
Other	199	1.2%

By age

Age band	Voters	Share
18-24	1,589	9.7%
25-34	2,519	15.3%
35-49	3,683	22.4%
50-64	4,437	27%
65+	4,159	25.3%
Unknown	26	0.2%

Source: public New Jersey voter registration records, as of 2026-06-04, aggregated to protect individual privacy. "Unaffiliated" voters are registered but not declared with a party and are the swing pool that decides close races in this district. No individual voter records are published on this site.