Update: A more recent version of this chart with the 2020 figure is now available.

Below are the U.S. Census figures from the graphic, along with some additional population numbers put together by Tony Dierckins of Zenith City Online fame:

1854 – 1 (George Stuntz)
1857 – 1,500 (estimate)
1860 – 80
1868 – “14 families”
1870 – 3,131
1873 – 4,500
1875– “3,000” based on six people per vote (500 cast)
1880 – 3,483
1883 – “13,000″ (Wellge map, unofficial)
1885 – 18,093 (Oneota & Fond du Lac)
1887– “35,000” (Wellge map, unofficial)
1890 – 33,115
1893 – “70,000″ (Wellge map, unofficial)
1895 – 59,396
1900 – 52,969 (72nd largest city in United States, up from 156th)
1905 – 64,937
1910 – 78,466
1915– 91,435
1920 – 98,917
1930 – 101,463
1940 – 101,065
1950 – 104,511
1960 – 106,884
1970 – 100,578
1980 – 92,811
1990 – 85,493
2000 – 86,319
2010 – 86,265