Here is a list of suicide prevention hotlines for all 50 U.S. states. In addition to state-specific hotlines, there is also the National Suicide Prevention Lifeline, which is available 24/7 and can provide support across the country:
National:

National Suicide Prevention Lifeline: 988 (Available nationwide)

State-Specific Suicide Prevention Hotlines:

Alabama: 1-800-273-TALK (8255)
Alaska: 1-877-266-4357
Arizona: 1-800-254-HELP (4357)
Arkansas: 1-888-274-7472
California: 1-800-273-TALK (8255)
Colorado: 1-844-493-TALK (8255)
Connecticut: 1-800-273-TALK (8255)
Delaware: 1-800-273-TALK (8255)
Florida: 1-800-273-TALK (8255)
Georgia: 1-800-715-4225
Hawaii: 1-800-753-6879
Idaho: 1-208-398-4357
Illinois: 1-800-273-TALK (8255)
Indiana: 1-800-273-TALK (8255)
Iowa: 1-800-273-TALK (8255)
Kansas: 1-888-274-7472
Kentucky: 1-800-273-TALK (8255)
Louisiana: 1-877-655-1010
Maine: 1-888-568-1112
Maryland: 1-800-273-TALK (8255)
Massachusetts: 1-800-273-TALK (8255)
Michigan: 1-800-273-TALK (8255)
Minnesota: 1-800-273-TALK (8255)
Mississippi: 1-877-925-1122
Missouri: 1-800-273-TALK (8255)
Montana: 1-800-273-TALK (8255)
Nebraska: 1-800-273-TALK (8255)
Nevada: 1-800-273-TALK (8255)
New Hampshire: 1-800-273-TALK (8255)
New Jersey: 1-855-654-6735
New Mexico: 1-800-273-TALK (8255)
New York: 1-800-273-TALK (8255)
North Carolina: 1-800-273-TALK (8255)
North Dakota: 1-800-273-TALK (8255)
Ohio: 1-800-273-TALK (8255)
Oklahoma: 1-800-273-TALK (8255)
Oregon: 1-800-273-TALK (8255)
Pennsylvania: 1-800-273-TALK (8255)
Rhode Island: 1-800-273-TALK (8255)
South Carolina: 1-800-273-TALK (8255)
South Dakota: 1-800-273-TALK (8255)
Tennessee: 1-800-273-TALK (8255)
Texas: 1-800-273-TALK (8255)
Utah: 1-800-273-TALK (8255)
Vermont: 1-800-273-TALK (8255)
Virginia: 1-800-273-TALK (8255)
Washington: 1-800-273-TALK (8255)
West Virginia: 1-800-273-TALK (8255)
Wisconsin: 1-800-273-TALK (8255)
Wyoming: 1-800-273-TALK (8255)

Please note that many of these hotlines are coordinated through the National Suicide Prevention Lifeline network, but individual states may also have additional crisis services. The 988 Lifeline is a new nationwide number for suicide prevention, mental health crisis support, and related services, available 24/7.