This map gives a ward by ward, precinct by precinct breakdown of vote totals in Madison and Dane County. Overall 72% of Dane County voters and 80% of Madison voters picked Barack Obama.
In 2004, 66% of county voters and 74% of city of Madison voters cast their ballots for Democratic candidate John Kerry.
This year, there was not a single significant ward in Madison, or a single precinct in Dane County, in which the majority of voters picked John McCain. McCain did win two Madison wards (105 and 133), however each ward had three or less voters.
Obama did best in Madison Ward 53, located on the south side, where he garnered 94.3% of the vote. Obama's lowest totals were in the town of Vienna, where he received a mere 53.3%.
One interesting result of the voting in Madison was the lower totals for Obama in student-heavy wards surrounding the University of Wisconsin-Madison. Adjacent wards in the city, both on the near west side and downtown, turned out more strongly for Obama. This suggests the university is no longer as liberal as it has been in the past. Perhaps this is a reflection of changing student demographics.