Worth County IAGenWeb Census Worth County Population Totals 1860 = 756 1870 = 2,892 1880 = 7,953 1890 = 9,247 1900 = 10,887 1910 = 9,950 1920 = 11,630 1930 = 11, 164 1940 = 11,449 1950 = 11,068 1960 = 10,259 1970 = 8,968 1980 = 9,075 1990 = 7,991 2000 = 7,909 2010 = 7,598 2020 = 7,443 1860 Census Bristol Township Hartland Township Northwood Township 1870 Census Worth County 1880 Census Barton Township Bristol Township Brookfield Township Danville Township Deer Creek Township Fertile Township Grafton Township Hartland Township Kensett Kensett Township Lincoln Township Manly Township Northwood Northwood Township Silver Lake Township Union Township 1885 Iowa Census Barton Township Bristol Township Index Brookfield Township Index Danville Township Index Deer Creek Township 1900 Census Barton Township Bristol Township Brookfield Township Danville Township Deer Creek Township Fertile Township Grafton Hanlontown Township Hartland Township Kensett Kensett Township Lincoln Township Manly Township Northwood Union Township 1905 Census Danville Fertile Township Grove Township Hanlontown Hartland Township Kensett Kensett Township Lincoln Township Manly Northwood Silver Lake Township Union Township 1910 Census Barton Bristol Township Brookfield Township Danville Township Deer Creek Township Fertile Fertile Township Grove Township Hartland Township Kensett Lincoln Township Manly Northwood Silver Lake Silver Lake Township 1910 Worth 1920 Census Danville Fertile Township Grafton Hartland Township Union Township 1930 Census Barton Township Bristol Township Brookfield Township Danville Township Deer Creek Township Fertile Fertile Township Grafton Grove Township Hanlontown Hartland Township Joice Township Kensett Kensett Township Lincoln Township Manly Northwood Silver Lake Township Union Township 1940 Census Barton Bristol Brookfield Township Danville Township Fertile Fertile Township Hanlontown Joice Silver Lake Township