You can check this graphic to see when the polls close in each state and follow results in them as they are available. Here's when the polls close in the tightest battleground states states: 

  • 7 p.m. ET: Virginia, Florida (Peninsula)
  • 7:30 p.m. ET: Ohio, North Carolina
  • 8 p.m ET: Florida (Panhandle), New Hampshire, Pennsylvania
  • 9 p.m. ET: Colorado, Wisconsin
  • 10 p.m. ET: Iowa, Nevada

The Fix's Aaron Blake posted on which counties are the most important ones to watch in those states: Arapahoe (Colo.), Polk  (Iowa), Outagamie (Wis.), Hillsborough (Fla.), Chester (Pa.), Henrico (Va.), Hamilton (Ohio).