1787: Wisconsin became part of the original Northwest Territory
1800: Wisconsin became part of the Indiana Territory
1809: Wisconsin became part of the Illinois Territory
1818: Wisconsin was part of the Michigan Territory, Bayfield County became part of Michilimackinac County
1826: Bayfield County became part of Chippewa County.
1836: What is now Wisconsin became the Wisconsin Territory, What is now Bayfield County became part of Crawford County.
1840: What is now Bayfield County became part of St. Croix County.
1845: What is now Bayfield County became part of La Pointe County. La Pointe on Madeline became the County Seat.
1848: The Wisconsin Territory became the State of Wisconsin.
1854: Douglas County was set apart from La Pointe County.
1858: Bayfield became the County Seat of La Pointe County.
1860: Ashland County was set apart from La Pointe County.
1866: La Pointe County was renamed Bayfield County. The entire county was included in the Town of Bayfield.
1884: Town of Drummond created. Town of Mason created. Town of Washburn created.
1885: Population of Bayfield County is 3, 431.
1892: Washburn became the County Seat of Bayfield County. Town of Iron River created.
1898: Town of Pratt created.
1901: Town of Port Wing created.
1903: Town of Bell created. Town of Barnes created.
1904: Town of Eileen created. Town of Cable created. Town of Orienta created. Town of Oulu created. City of Washburn incorporated.
1906: Town of Clover created.
1907: Town of Hughes created. Town of Barksdale created.
1909: Town of Lincoln created. Town of Pilsen created.
1911: Town of Tripp created.
1912: Town of Kelly created.
1913: Town of Namakagon created. Town of Russell created. Town of Bayview created. City of Bayfield incorporated.
1918: Town of Keystone created.
1924: Town of Delta created.
1925: Village of Mason was incorporated.
1925: Dance Hall Inspectors: Nels Nelson, Alois Habelt, L.H. McCarty
Soldiers’ Relief: Robert Inglis, H.G. Mertens and John Holman
Number of school children in Bayfield County: 7,041 Number of dairy cattle in Bayfield County: 14,262
(Official Directory, State, County and Town Officers, Bayfield County, Wis. (1925-1926)
1938: School-aged children in Bayfield County: 4,924. Number of cattle in Bayfield County: 14,344
1950: Population of Bayfield County: 13,685
1960: Population of Bayfield County: 11,910
1969: Town of Pratt renamed Town of Grand View.
1970: Population of Bayfield County: 11,683