Government in Johnsonburg, NJ Frelinghuysen Twp Municipal210 County Road 661Johnsonburg, NJ, 078469088524121Asbury Municipal OfficeGovernment OfficesMount Olive Township Municipal Government OfficesFrelinghuysen Twp Mun Bldg210 County Road 661Johnsonburg, NJ, 078469088524121Government OfficesShow MoreSee AlsoGovernment Offices