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.[17][18]
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.[19] The county court was also located at Log Gaol.[18]
By 1882, the population had grown to 300. Johnsonburg had a post office, a large glove factory, and a "good local trade".[20]
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]
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.[16]
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.[24]
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.[25]
^New Jersey: 2010 - Population and Housing Unit Counts - 2010 Census of Population and Housing (CPH-2-32), United States Census Bureau, p. III-5, August 2012. Accessed June 4, 2013. "Warren County—Name Changes: Beattystown CDP name corrected from Beatyestown; New CDPs: Allamuchy (formed from part of deleted Allamuchy-Panther Valley CDP), Anderson, Asbury, Blairstown, Brainards, Bridgeville, Broadway, Brookfield, Buttzville, Columbia, Delaware, Delaware Park, Finesville, Great Meadows (formed from part of deleted Great Meadows-Vienna CDP and additional area), Greenwich, Hainesburg, Harmony, Hope, Hutchinson, Johnsonburg, Lopatcong Overlook, Marksboro, Mountain Lake, Mount Hermon, New Village, Panther Valley (formed from part of deleted Allamuchy-Panther Valley CDP), Port Colden, Port Murray, Silver Lake, Stewartsville, Upper Pohatcong, Upper Stewartsville, and Vienna (formed from part of deleted Great Meadows-Vienna and additional area)"
^US 2020 Census Bureau report, Johnsonburg CDP, Warren County, New Jersey