Poll closing times, 2020. These may change. Consider that all states, in accordance with the COVID-19 plague, made voting by absentee ballot or mail far easier than normal; some states could revert to old practices in 2024 in accordance with legislation.
I cannot say that states will complete counting their votes (aside from election-day votes) soon after polls close as they did before 2020. Ignore districts in Maine and Nebraska.
Closing time for the entire state, all times EST or EDT:
7PM
7:30
8:00
8:30
9:00
10:00
11:00
midnight
1 AM (Wednesday)
Pastel colors: light blue is 8PM; lime green is 8:30 PM; yellow is 9 PM; light orange is 10 PM
*polls close in accordance with local time, so the more westerly zone closes one hour later than the polls in the more easterly zones
**in states that straddle time zones, polls close at the same time across the state
***county option in some parts of the more westerly time zone
! (from the source):
Polling hours end at 8:00p MST (0300 UTC) / 8:00p PST (0400 UTC). Oregon votes by mail. Ballots must be in the hands of election workers or in an official drop-off location no later than 8 PM local time. OREGON is the reverse of the norm because the by far largest portion of the state is in the lagging time zone and the networks have no choice but to not consider the OREGON polls closed until 8 PM Pacific.
Colors shown have no bearing on the partisan lean of the state.
http://www.thegreenpapers.com/G16/closing.phtml?format=gc
Puerto Rico, should it attain statehood:
In 2014, Grand and San Juan counties switched to vote by mail.
Ballots are mailed to registered voters 28 days prior to the election. Returned ballots must be postmarked no later than the day before the election. The final canvass must be completed no later than 14 days after the election.
This is 2016 data, but polls closed at 5 PM Atlantic Time, which is advanced one hour before Eastern Time (4 PM) I would expect changes in the pattern in the event that Puerto Rico is admitted to the Union.
The panhandle closes at 7PM and parts of MI closes at 8AM. Parts of ID reports results at 10PM
