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  Population Delaware, Ohio  
Census City County
1810 150 2000
1820 250 7639
1830 532 11504
1840 898 22060
1850 2074 21817
1860 3889 23902
1870 6000 25175
1880 6968 27381
1890   27189
1900 7960 26401
1910 9227 27182
1920 9057 26013
1930 8722 26016
1940 8944 26780
1950 11785 30278
1960 13500 36107
1970 15008 42908
1980 18780 53840
1990 20030 66929
2000 25243 109989
       2004 est. 30012 142503