Johnsonburg, New Jersey

Johnsonburg is an unincorporated community and census-designated place (CDP) located within Frelinghuysen Township in Warren County, in the U.S. state of New Jersey, that was created as part of the 2010 United States Census. As of the 2020 Census, the CDP's population was 381, up from 101 in the 2010 Census.

History
Johnsonburg originated as an important stagecoach stop. An east-west route carried mail from Dover, New Jersey to Stroudsburg, Pennsylvania, and a north-south route carried mail from Albany, New York to Philadelphia, Pennsylvania. Both routes crossed at right angles at this location, and a post office and tavern were built. The tavern became an important meeting place, and elections and caucuses were held there.

A jail was erected in 1753, and the community became known as "Log Gaol" (log jail). Located at the time in Sussex County, Log Gaol was the county seat from 1753 to 1765. The county court was also located at Log Gaol.

By 1882, the population had grown to 300. Johnsonburg had a post office, a large glove factory, and a "good local trade".

The Delaware, Lackawanna and Western Railroad ('DLW') opened Johnsonburg station in Johnsonburg in 1911, along a mainline running between Hoboken, New Jersey and Buffalo, New York. The railway was important to local dairy farmers, who shipped their products east to Newark and New York City. The historic Lackawanna passenger station has been demolished.

Geography
According to the United States Census Bureau, the CDP had a total land area of 0.196 square miles (0.509 km2), and no water area.

2010 census
The 2010 United States census counted 101 people, 42 households, and 32 families in the CDP. The population density was 514.3 /sqmi. There were 45 housing units at an average density of 229.2 /sqmi. The racial makeup was 100.00% (101) White, 0.00% (0) Black or African American, 0.00% (0) Native American, 0.00% (0) Asian, 0.00% (0) Pacific Islander, 0.00% (0) from other races, and 0.00% (0) from two or more races. Hispanic or Latino of any race were 0.00% (0) of the population.

Of the 42 households, 23.8% had children under the age of 18; 54.8% were married couples living together; 11.9% had a female householder with no husband present and 23.8% were non-families. Of all households, 16.7% were made up of individuals and 4.8% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.75.

16.8% of the population were under the age of 18, 5.9% from 18 to 24, 23.8% from 25 to 44, 37.6% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 46.4 years. For every 100 females, the population had 98.0 males. For every 100 females ages 18 and older there were 95.3 males.

Historic district
The Johnsonburg Historic District is a 163 acre historic district encompassing the community along County Route 519 (Johnsonburg Road, Dark Moon Road), County Route 661 (Main Street) and adjacent parts of Mott and Allamuchy Roads. It was added to the National Register of Historic Places on October 15, 1992, for its significance in architecture, community development, commerce, industry, and religion. The district includes 74 contributing buildings, 4 contributing sites, 3 contributing structures and 1 contributing object.

The Armstrong/Blair House features Colonial Revival and Greek Revival architecture. The Frelinghuysen Township Hall was formerly the Presbyterian Chapel. It was built in 1851 and features Greek Revival and Federal architecture. The Christian Church is a one-story stone church built c. 1838–1848. The Methodist Episcopal Church was built in 1850 with Gothic Revival architecture.

The John Gibbs House is an example of an octagon house. It was built in 1853 and was documented by the Historic American Buildings Survey (HABS) in 1941.