Comparing the early voting data to the 2020 General Election Democrat and Republican vote data based on the county on Nov 1st, 2020 data published on https://elections.wi.gov/index.php/node/7219 and the registration data located at https://elections.wi.gov/node/7220
The above chart shows the total number of votes cast in that county from 2000 to 2016 in the general presidential election in comparison to 2020 Registration Numbers and mail in ballot requests. Dane, Milwaukee, Waukesha, Brown are the biggest counties in Wisconsin, with a steady but massive increase in the number of voters for the past 20 years.
For example, Dane county in the past 20 years has increased its voter population by 100K with no dip in its voter population and a commendable voter participation (when compared to 2020 registered rolls) with 86% in 2020, which is also its highest vote of 336,996, and 80% in 2016.
Milwaukee also has a similar track record of high voter participation with 77% in 2020 and 87% in 2016, with the highest votes of 482,576 for President Obama's 2nd term re-election bid in 2012. Waukesha, like Dane, also on has increased in voter turn out during the last 20 years, and has a similar track record of high voter participation, with 90% at the highest (263,500 votes in 2020) and 82% in 2016. A 90% voting in 2020 in a county is amazing, though its lowest is 70% voter turn out. Other than 2020, its highest vote turn out was in 2012. Milwaukee also has a similar track record of high voter participation, with 77% in 2020 and 87% in 2016, which had the highest number of votes at 482,576 for President Obama's 2nd term re-election bid in 2012.
Brown County, unlike the others, started out at 66% participation (using 2020 registration numbers*) and steadily gained, never to drop off irrespective of the candidates running for president. For instance, in 2016, which was considered by many in America as the worst possible choices for president, had the highest voter participation on record since the past 16 years at 128,978 votes. It is also another county where every year, the voter participation keeps increasing in number, with 2020 being the best year at 87% participation.
The above charts shows the percent of votes cast mail-in over registered voters. One. Brown, Dane, Milwaukee, and Waukesha are also among the highest mail-in voting counties above 50%. Additionally, 63% of Dane, Ozaukee, Waukesha county votes were mail-in. About 50%-59% of the votes are in the following counties: Brown, Calumet, Door, Kenosha, La Crosse, Milwaukee, Outagamie, Racine, Walworth, Washington, and Winnebago.
The above charts shows the actual number of votes cast mail-in over registered voters per county.
Brown, Dane, Milwaukee, and Waukesha counties are among the top 5 number of voters, top percentage of voters, and also the top % of mail-in voters, as the above graphs show.