State

Timing of results

When last polls close (Eastern time)

Type of ballots reported first

Can postmarked ballots arrive later?

Do those who request a mail ballot but vote in person instead cast a provisional ballot?

Alabama

Solid R

The secretary of state has said to expect all unofficial results on election night.

8 p.m.

No order

No

Yes, reviewed later

Alaska

Likely R

The only results reported on election night will be from in-person early voting through Oct. 29 and from the precincts on Election Day. No mail or other absentee ballots will be counted until about a week later.

1 a.m. (most at midnight)

Early in-person and Election Day ballots

Yes, by Nov. 13. No mail ballots counted until around Nov. 10.

No

Arizona

Lean D

Officials are not predicting the share of ballots that will be reported by Wednesday. A new law allows officials to count mail votes starting two weeks before the election, so the first votes, typically reported at 10 p.m. Eastern, are likely to be relatively stronger for Mr. Biden.

9 p.m.

Early votes (in-person and mail ballots arriving before Election Day)

No

Yes, reviewed later

Arkansas

Solid R

Officials estimate that nearly all votes will be reported by noon on Wednesday.

8:30 p.m.

Varies by county, but early in-person votes often first

No

Yes, reviewed on election night

California

Solid D

Officials did not make a timing estimate but noted that all active registered voters were sent mail ballots, and that late-arriving mail ballots and provisional ballots would be counted over the following days and weeks.

11 p.m.

Mail ballots arriving before Election Day

Yes, as late as Nov. 20

Yes, in some counties, if voter does not surrender mail ballot. Reviewed later.

Colorado

Likely D

Officals estimate that 75 percent to 80 percent of votes will be reported by midday Wednesday, depending on how many voters wait to return their ballot or decide to vote in person on Election Day.

9 p.m.

No order, most vote by mail

No

No

Connecticut

Solid D

Officials said it is impossible to predict when all votes will be reported, but for most towns, it will probably be earlier than the statutory deadline of 96 hours (Saturday).

8 p.m.

No order

No

No

Delaware

Solid D

Officials estimate that more than 99 percent of votes will be reported by noon on Wednesday.

8 p.m.

No order

No

No

District of Columbia

Solid D

Officials did not have an estimate for the timing of results.

8 p.m.

Early in-person and processed mail ballots

Yes, by Nov. 13. Reported on a rolling basis.

No, as long as the voter has not already mailed in a ballot.

Florida

Tossup

All early voting and previously tabulated mail ballots, which are likely to be relatively stronger for Mr. Biden, should be reported by 8:30 p.m. Eastern. Officials did not make a projection for the timing of full unofficial results, but they were allowed to process early-arriving mail ballots starting weeks before the election.

8 p.m. (most at 7 p.m.)

Early in-person and counted mail ballots

No

Yes, if voter does not surrender mail ballot. Reviewed later.

Georgia

Tossup

Officials did not provide an estimate but said that because of the large volume of mail ballots expected, it could take a couple of days for all of them to be scanned and counted. The secretary of state has said he expects the winners of most races to be announced by Nov. 4.

7 p.m.

No order

No

No. If a voter does not surrender a mail ballot, the voter can sign an affidavit and cast a regular ballot.

Hawaii

Solid D

Votes are released in three stages, with early mail ballots at midnight Eastern, in-person votes at 3 a.m. Eastern and a final report later. Officials estimate that 95 percent to 99 percent of votes will be reported as of Wednesday.

Midnight

Mail ballots processed up to Election Day

No

No

Idaho

Solid R

Officials estimate that nearly all votes will be reported by noon on Wednesday.

11 p.m. (some at 10 p.m.)

No order

No

No

Illinois

Solid D

Officials did not have an estimate, saying that timing will depend on when voters return their ballots. The number of mail ballots that have not yet been returned will be reported here.

8 p.m.

Early in-person and processed mail ballots

Yes, by Nov. 17

Yes, if voter does not surrender mail ballot. Counted within two weeks.

Indiana

Likely R

Officials say the speed of counting will depend on the volume of absentee ballots, and that a more complete picture of results may not be available for several days after the election.

7 p.m. (most at 6 p.m.)

No order

No

In some situations

Iowa

Tossup

Officials said they are confident they will have unofficial results “in a timely fashion like we do for every election.”

10 p.m.

Absentee ballots likely first

Yes, by Nov. 9

Yes, if voter does not surrender mail ballot

Kansas

Likely R

Officials said they could not speculate on the timing of results but noted that the state did not experience systematic delays in its Aug. 4 primary.

9 p.m. (most at 8 p.m.)

Typically early in-person and some mail votes

Yes, by Nov. 6. Results reported daily.

Yes, reviewed between Nov. 9 and Nov. 17

Kentucky

Solid R

Officials said they could not speculate on the timing of complete results. Counties have been instructed to report all in-person votes and mail ballots arriving by 6 p.m. by midnight on election night.

7 p.m. (6 p.m. in some counties)

No order

Yes, by Nov. 6. Results reported on Nov. 6 and 10.

No

Louisiana

Solid R

No timing estimates provided.

9 p.m.

No order

No

No

Maine

Likely D*

Solid D (1st Dist.), Tossup (2nd Dist.)

Officials are not expecting delays processing mail ballots unless most absentee voters wait until Election Day to return them.

8 p.m.

No order

No

No

Maryland

Solid D

Officials said they could not estimate how many votes would be reported by noon on Wednesday.

8 p.m.

Early in-person and counted mail ballots

Yes, by Nov. 13. Results reported each day those ballots are counted.

Yes, reviewed beginning Nov. 12

Massachusetts

Solid D

In recent elections, 97 percent of votes were reported by noon on Wednesday. Officials say they do not expect any changes to the number of precincts reporting this year but noted that ballots arriving on Election Day and after will be counted on or after Nov. 6.

8 p.m.

No order

Yes, by Nov. 6. Officials will start counting ballots arriving after 5 p.m. on Nov. 3 on Nov. 6.

No

Michigan

Lean D

Officials have said that full unofficial results could take until Nov. 6. Processing of ballots does not begin until Election Day, or the day before the election in some jurisdictions. If there are a significant number of mail ballots outstanding at the end of election night, the reported totals could be relatively stronger for Mr. Trump.

9 p.m. (most at 8 p.m.)

No order

No

No. If a voter does not surrender a mail ballot, the voter can sign an affidavit to cancel it and cast a ballot that will be tabulated that day.

Minnesota

Lean D

Officials expect to count and report close to 100 percent of votes cast on or before Election Day by noon Wednesday. Outstanding mail ballots will be reported on the secretary of state’s website.

9 p.m.

No order

Yes, by Nov. 10. Results reported daily.

No

Mississippi

Solid R

Officials estimate that 90 percent to 95 percent of votes will be reported by noon on Wednesday.

8 p.m.

No order

Yes, by Nov. 10. No reporting schedule for results.

Yes, reviewed during 10 days following election

Missouri

Likely R

Officials estimate that more than 99 percent of votes will be reported by noon on Wednesday.

8 p.m.

No order

No

No

Montana

Likely R

Officials said they expect timely results from the counties. Most voters were sent mail ballots.

10 p.m.

Typically mail and other absentee ballots start to be reported first.

No

No

Nebraska

Solid R*

Lean D (2nd Dist.)

No details provided.

9 p.m.

No

Yes, if the voter did not return the ballot or lost it. Reviewed within 10 days.

Nevada

Lean D

Officials said they did not know what share of votes would be reported by noon Wednesday. Ballots were mailed to all active registered voters.

10 p.m.

No order

Yes, by Nov. 10. Results reported daily.

No, as long as the voter has not already mailed in a ballot.

New Hampshire

Lean D

No details provided.

8 p.m. (most at 7 p.m.)

No

No

New Jersey

Solid D

Officials said they did not have a prediction for when a complete count would be available. Mail ballots were sent to all active, registered voters. It took weeks to finish counting ballots during the state’s July primary.

8 p.m.

No order

Yes, by Nov. 10. Reporting varies by county.

Yes, counted beginning Nov. 10

New Mexico

Solid D

Officials did not provide an estimate but said that they expected that the majority, if not all, of the winners in the state would be evident by midday Wednesday.

9 p.m.

Early in-person and processed mail ballots

No

No. Voter can sign an affadavit to cancel mail ballot and cast a regular ballot in person.

New York

Solid D

Only unofficial results from in-person early and Election Day voting will be released on election night. Absentee ballots will be reported in the following days, depending on the county. It took weeks to finish counting ballots during the state’s June primary.

9 p.m.

In-person early and Election Day ballots

Yes, by Nov. 10. Results reporting varies by county.

No. If a voter casts an in-person ballot, the absentee ballot is set aside and not counted.

North Carolina

Tossup

Early votes and processed mail ballots, which are likely to be relatively stronger for Mr. Biden, will be reported around 7:30 p.m. Election day results, which are likely to be relatively stronger for Mr. Trump, will be reported between 8:30 p.m. and 1 a.m. Officials estimate that upward of 98 percent of ballots cast will be reported on election night.

7:30 p.m.

Early in-person and processed mail ballots

Yes, by Nov. 12

No

North Dakota

Solid R

Officials expect all ballots cast before and on Election Day to be reported by noon on Wednesday. The timing of complete unofficial results will depend on how many postmarked ballots arrive after Election Day.

9 p.m.

No order

Yes, by Nov. 9. All ballots arriving after Election Day reported on Nov. 9.

No

Ohio

Tossup

Ballots cast before Election Day will be reported by 8 p.m., and they are likely to be relatively stronger for Mr. Biden. They will be followed by those cast in-person or arriving on Election Day. After election night, no more results will be released until final certification, which must be completed by Nov. 28. No predictions were provided for the share of results reported by Wednesday.

7:30 p.m.

Absentee ballots cast in-person or by mail before Election Day

Yes, by Nov. 13. All ballots arriving after Election Day reported by Nov. 28.

Yes, only for those voting on Election Day. Reported by Nov. 28.

Oklahoma

Solid R

Officials said that they do not have an estimate for when full unofficial results will be available, but that typically all counties finish reporting results on election night.

8 p.m.

Typically, early in-person results

No

No

Oregon

Solid D

Officials do not have an estimate for when full unofficial results will be available. In the past two general elections, about 10 percent of votes remained outstanding by noon on Wednesday.

11 p.m. (some 10 p.m.)

No order, vote entirely by mail

No

No

Pennsylvania

Lean D

Secretary of the Commonwealth Kathy Boockvar has said that she expects “the overwhelming majority” of votes will be counted by Friday, Nov. 6. Officials cannot begin to process mail ballots until Election Day, and if there are a significant number of mail ballots outstanding at the end of the night, the reported totals could be relatively stronger for Mr. Trump.

8 p.m.

Officials did not specify, but Ms. Boockvar has said that in order to prevent large swings in results, she is asking counties to report mail votes routinely instead of all at once.

Yes, by Nov. 6. Reporting will vary by county.

Yes, if voter does not surrender mail ballot. Reviewed within seven days.

Rhode Island

Solid D

The state had initially planned not to report any mail votes on election night, but its elections board voted Monday to release a first count at 11 p.m. A second count will be released the next day; a third will be released when all mail votes have been counted; and a fourth, final release (to resolve any ballots with outstanding issues) will occur the week after the election.

8 p.m.

In-person votes

No

Yes, reviewed within two days.

South Carolina

Likely R

Officials say that their goal is to release 100 percent of results on election night, but that the number of mail ballots could push processing into Wednesday in some counties.

7 p.m.

Varies by county

No

Yes, if voters say they never received ballot. Reviewed on Nov. 6.

South Dakota

Solid R

No statewide estimates on timing provided, but officials in Minnehaha County, which includes Sioux Falls, said they planned to finish counting ballots late on Nov. 4.

9 p.m. (most at 8 p.m.)

Varies by county

No

No

Tennessee

Solid R

Officials say they cannot predict but hope that more than 99 percent of votes will be reported by noon on Wednesday.

8 p.m.

No order

No

Yes. Most will be reviewed and counted within four business days of the election, if the voter’s mail ballot has not been received.

Texas

Tossup

No estimate was provided for the share that will be reported by Wednesday. Because an excuse is required to vote by mail in Texas, officials do not think that processing those votes will result in delays, though increased turnout could.

9 p.m. (most at 8 p.m.)

Depends on the county.

Yes, by Nov. 4. Reporting varies by county.

Yes, if voter does not surrender mail ballot.

Utah

Likely R

Officials did not have an estimate for when full unofficial results will be available. In the past two general elections, about 30 percent of votes remained outstanding by noon on Wednesday.

10 p.m.

No order, most vote by mail.

Yes, by Nov. 10 to Nov. 17, depending on the county. Reported daily.

Yes, if voter does not surrender mail ballot. Reviewed by Nov. 17.

Vermont

Solid D

Officials estimate that unofficial results will be available for most or all precincts by midnight.

7 p.m.

No order

No

No

Virginia

Likely D

Election Day in-person votes, which are likely to be relatively stronger for Mr. Trump, are likely to be reported first in most counties. After an 11 p.m. deadline, counties must report all early in-person ballots and mail ballots processed up to that point. Officials did not estimate what share would be reported by Wednesday.

7 p.m.

In most counties, in-person Election Day votes

Yes, by noon on Nov. 6. Mail ballots processed after election night will be reported on Friday, Nov. 6.

Yes, if voter does not surrender mail ballot

Washington

Solid D

Officials estimate that less than 50 percent of votes will be reported on election night.

11 p.m.

No order, most vote by mail

Yes, by Nov. 23.

No

West Virginia

Solid R

Officials did not provide an estimate, saying the timing would depend on how many people request absentee ballots and return them before Election Day.

7:30 p.m.

No order

Yes, by Nov. 9. Those arriving after Election Day reported Nov. 9.

Yes, if voter does not surrender mail ballot. Reviewed beginning Nov. 9.

Wisconsin

Lean D

Gov. Tony Evers has said he expects to know the results on election night, or by the day after at the latest. The elections director in Milwaukee County, which officials say has the potential to be the latest to report, said that results could take until between 3 a.m. and 6 a.m. Wednesday.

9 p.m.

No order in most places, but in-person votes could come first in 39 municipalities that count absentee ballots separately (including Milwaukee).

No

No

Wyoming

Solid R

Officials have said they expect more than 99 percent of votes to be reported by noon on Wednesday.

9 p.m.

No order

No

Yes, reviewed on election night.