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Census Directory
1850-2010 Populations of Delaware County
Rank Year Population
Rank Year Population
41 2010 17,764
52 1920 18,183
40 2000 18,404
50 1910 17,888
41 1990 18,035
50 1900 19,185
45 1980 18,933
49 1890 17,349
43 1970 18,770
36 1880 17,950
50 1960 18,483
29 1870 17,432
53 1950 17,734
27 1860 11,024
49 1940 18,487
27 1850 1759
51 1930 18,122





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