Missouri
Requirements
US Citizen
Missouri Resident
17 ½ years of age to register, 18 years of age to vote
Not convicted of a felony or misdemeanor connected to voting
Not judicially declared adjudicated or incapacitated
https://www.sos.mo.gov/elections/goVoteMissouri/register.aspx
Voter Registration Forms
Election Info
ID Required: Yes
Same-Day Registration: Yes
Deadlines
New Voter Registration: October 7
Absentee Ballot Request: October 21