The Big Ten was known as the Western Conference (1896-1952).

1896 Wisconsin (2-0-1)
1897 Wisconsin (3-0)
1898 Michigan (3-0)
1899 Chicago (4-0)
1900 Iowa (3-0-1), Minnesota (3-0-1)
1901 Michigan (4-0), Wisconsin (2-0)
1902 Michigan (5-0)
1903 Michigan (3-0-1), Minnesota (3-0-1), 
     Northwestern (1-0-2)
1904 Minnesota (3-0), Michigan (2-0)
1905 Chicago (7-0)
1906 Wisconsin (3-0), Minnesota (2-0), Michigan (1-0)
1907 Chicago (4-0)
1908 Chicago (5-0)
1909 Minnesota (3-0)
1910 Illinois (4-0), Minnesota (2-0)
1911 Minnesota (3-0-1)
1912 Wisconsin (6-0)
1913 Chicago (7-0)
1914 Illinois (6-0)
1915 Minnesota (3-0-1), Illinois (3-0-2)
1916 Ohio St. (4-0)
1917 Ohio St. (4-0)
1918 Illinois (4-0), Michigan (2-0), Purdue (1-0)
1919 Illinois (6-1)
1920 Ohio St. (5-0)
1921 Iowa (5-0)
1922 Iowa (5-0), Michigan (4-0)
1923 Illinois (5-0), Michigan (4-0)
1924 Chicago (3-0-3)
1925 Michigan (5-1)
1926 Michigan (5-0), Northwestern (5-0)
1927 Illinois (5-0)
1928 Illinois (4-1)
1929 Purdue (5-0)
1930 Michigan (5-0), Northwestern (5-0)
1931 Purdue (5-1), Michigan (5-1), Northwestern (5-1)
1932 Michigan (6-0)
1933 Michigan (5-0-1)
1934 Minnesota (5-0)
1935 Minnesota (5-0), Ohio St. (5-0)
1936 Northwestern (6-0)
1937 Minnesota (5-0)
1938 Minnesota (4-1)
1939 Ohio St. (5-1)
1940 Minnesota (6-0)
1941 Minnesota (5-0)
1942 Ohio St. (5-1)
1943 Purdue (6-0), Michigan (6-0)
1944 Ohio St. (6-0)
1945 Indiana (5-0-1)
1946 Illinois (6-1)
1947 Michigan (6-0)
1948 Michigan (6-0)
1949 Ohio St. (4-1-1), Michigan (4-1-1)
1950 Michigan (4-1-1)
1951 Illinois (5-0-1)
1952 Wisconsin (4-1-1), Purdue (4-1-1)
1953 Michigan St. (5-1), Illinois (5-1)
1954 Ohio St. (7-0)
1955 Ohio St. (6-0)
1956 Iowa (5-1)
1957 Ohio St. (7-0)
1958 Iowa (5-1)
1959 Wisconsin (5-2)
1960 Minnesota (5-1), Iowa (5-1)
1961 Ohio St. (6-0)
1962 Wisconsin (6-1)
1963 Illinois (5-1-1)
1964 Michigan (6-1)
1965 Michigan St. (7-0)
1966 Michigan St. (7-0)
1967 Indiana (6-1), Purdue (6-1), Minnesota (6-1)
1968 Ohio St. (7-0)
1969 Ohio St. (6-1), Michigan (6-1)
1970 Ohio St. (7-0)
1971 Michigan (8-0)
1972 Ohio St. (8-0), Michigan (7-1)
1973 Ohio St. (7-0-1), Michigan (7-0-1)
1974 Ohio St. (7-1), Michigan (7-1)
1975 Ohio St. (8-0)
1976 Michigan (7-1), Ohio St. (7-1)
1977 Michigan (7-1), Ohio St. (7-1)
1978 Michigan (7-1), Michigan St. (7-1)
1979 Ohio St. (8-0)
1980 Michigan (8-0)
1981 Iowa (6-2), Ohio St. (6-2)
1982 Michigan (8-1)
1983 Illinois (9-0)
1984 Ohio St. (7-2)
1985 Iowa (7-1)
1986 Michigan (7-1), Ohio St. (7-1)
1987 Michigan St. (7-0-1 )
1988 Michigan (7-0-1)
1989 Michigan (8-0)
1990 Iowa (6-2), Michigan (6-2), 
     Michigan St. (6-2), Illinois (6-2)
1991 Michigan (8-0)
1992 Michigan (6-0-2)
1993 Ohio St. (6-1-1), Wisconsin (6-1-1 )
1994 Penn St. (8-0)
1995 Northwestern (8-0)
1996 Ohio St. (7-1), Northwestern (7-1)
1997 Michigan (8-0)
1998 Ohio St. (7-1), Wisconsin (7-1), Michigan (7-1)
1999 Wisconsin (7-1)
2000 Michigan (6-2), Northwestern (6-2), Purdue (6-2)
2001 Illinois (7-1)
2002 Ohio State (8-0), Iowa (8-0)
2003 Michigan (7-1)
2004 Michigan (7-1), Iowa (7-1)
2005 Penn State (7-1), Ohio State (7-1)
2006 Ohio State (8-0)
2007 Ohio State (7-1)
2008 Penn State (7-1), Ohio State (7-1)