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Census Statistics of the Municipalities of Warren County
NAME Formed FORMED FROM 1790 1810 1820 1830 1840 1850 1860 1870 1880 1890 1900 1910 1920 1930 1940
Allamuchy 1873 Indepedence                 648 759 588 642      
Belvidere 1845 Oxford           1,001 1,530 1,882 1,773 1,768 1,784 1,764      
Blairstown 1845 Knowlton           1,405 1,542 1,379 1,458 1,662 1,576 1,718      
Franklin 1839 Mansfield         1,348 1,565 1,902 1,655 1,529 1,283 1,280 1,585      
Frelinghuysen 1848 Hardwick           1,277 1,297 1,113 1,042 879 797 1,074      
Greenwich -- before 1738 de novo 2,035 2,528 2,335 4,486 2,902 3,726 2,541 2,587 2,554 825 909 904      
Hackettstown 1853 Indepedence             1,352 2,202 2,502 2,417 2,474 2,715      
Hardwick -- before 1738 de novo   2,561 3,360 1,962 1,957 727 792 638 583 503 400 405      
Harmony 1839 Greenwich and Oxford         1,602 1,565 1,382 1,405 1,350 1,152 1,080 1,490      
Hope 1839 Knowlton and Oxford         1,903 1,755 1,789 1,542 1,569 1,332 1,144 1,119      
Indepedence 1782 Hardwick   1,224 1,850 2,126 2,140 2,621 1,871 1,766 1,018 904 805 867      
Knowlton 1798 Greenwich   2,064 2,701 2,827 2,310 1,356 1,557 1,691 1,476 1,411 1,210 1,556      
Lopatcong 1863 Formerly Phillpsburg               1,150 1,591 1,738 1,962 766      
Mansfield 1798 Greenwich   2,058 2,787 3,310 3,057 1,615 1,688 1,997 1,709 1,362 1,324 1,238      
Oxford 1798 Greenwich   2,470 3,089 3,665 2,855 1,718 2,350 2,952 4,594 4,002 3,095 3,444      
Pahaquarry 1824 Walpack   ?165 ?230 258 292 460 465 405 418 291 257 205      
Phillipsburg (town) 1861 Phillipsburg Twp.               5,932 7,181 8,644 10,052 13,903      
Phillipsburg (twp.) 1851 Greenwich and Harmony             3,741                
Pohatcong 1881 Greenwich                   1,483 2,215 3,202      
Washington Bor. 1868 Washington Twp.               1,880 2,142 2,834 3,580 3,567      
Washington Twp. 1849 Mansfield           1,567 2,634 2,160 1,452 1,304 1,249 1,023      
                                   
    Total   13,070 16,352 18,634 20,366 22,358 28,433 34,336 36,589 36,553 37,781 43,187 0 0 0
Source for 1790-1910:  George W. Cummins, History of Warren County New Jersey (New York:  Lewis Historical Publishing, 1911).