State	Do you need a reason?	List of valid reasons
Alabama	Yes	· out of county on election day · illness or disability · work shift is during all voting hours · student living outside of county · election worker or poll worker
Alaska	No excuse needed
Arizona	No excuse needed
Arkansas	Yes	· out of county on election day · illness or disability
California	No excuse needed
Colorado	No; all-mail elections (ballot mailed to all voters automatically!)
Connecticut	Yes	· out of county on election day · illness or disability · election worker or poll worker · religious belief or practice
Delaware	Yes	· out of county on election day · illness or disability · work shift is during all voting hours · religious belief or practice
District of Columbia	No excuse needed
Florida	No excuse needed
Georgia	No excuse needed
Hawaii	No; all-mail elections (ballot mailed to all voters automatically!)
Idaho	No excuse needed
Illinois	No excuse needed
Indiana	Yes	· out of county on election day · illness or disability · 65-plus · work shift is during all voting hours · election worker or poll worker · religious belief or practice · ACP Participant
Iowa	No excuse needed
Kansas	No excuse needed
Kentucky	Yes	· out of county on election day · illness or disability · 65-plus · work shift is during all voting hours · student living outside of county · ACP Participant · incarcerated (but still qualified to vote) · jurors
Louisiana	Yes	· out of county on election day · illness or disability · 65-plus · work shift is during all voting hours · student living outside of county · election worker or poll worker · ACP Participant · incarcerated (but still qualified to vote) · jurors
Maine	No excuse needed
Maryland	No excuse needed
Massachusetts	Yes	· out of county on election day · illness or disability · student living outside of county · religious belief or practice
Michigan	No excuse needed
Minnesota	No excuse needed
Mississippi	Yes	· out of county on election day · illness or disability · 65-plus
Missouri	Yes	· out of county on election day · illness or disability · election worker or poll worker · religious belief or practice · ACP Participant · incarcerated (but still qualified to vote)
Montana	No excuse needed
Nebraska	No excuse needed
Nevada	No excuse needed
New Hampshire	Yes	· out of county on election day · illness or disability · work shift is during all voting hours · religious belief or practice
New Jersey	No excuse needed
New Mexico	No excuse needed
New York	Yes	· out of county on election day · illness or disability · incarcerated (but still qualified to vote)
North Carolina	No excuse needed
North Dakota	No excuse needed
Ohio	No excuse needed
Oklahoma	No excuse needed
Oregon	No; all-mail elections (ballot mailed to all voters automatically!)
Pennsylvania	No excuse needed
Rhode Island	No excuse needed
South Carolina	Yes	· out of county on election day · illness or disability · 65-plus · work shift is during all voting hours · student living outside of county · election worker or poll worker · incarcerated (but still qualified to vote) · jurors
South Dakota	No excuse needed
Tennessee	Yes	· out of county on election day · illness or disability · 65-plus · work shift is during all voting hours · student living outside of county · election worker or poll worker · religious belief or practice · jurors
Texas	Yes	· out of county on election day · illness or disability · 65-plus · ACP Participant · incarcerated (but still qualified to vote)
Utah	No; all-mail elections (ballot mailed to all voters automatically!)
Vermont	No excuse needed
Virginia	No excuse needed
Washington	No; all-mail elections (ballot mailed to all voters automatically!)
West Virginia	Yes	· out of county on election day · illness or disability · 65-plus / "advanced age" · work shift is during all voting hours · student living outside of county · ACP Participant · incarcerated (but still qualified to vote)
Wisconsin	No excuse needed
Wyoming	No excuse needed

(Information from: https://www.ncsl.org/research/elections-and-campaigns/absentee-and-early-voting.aspx)