a U.S. citizen;
at least 18 years of age by election day;
a resident of Michigan and the city or township where you are applying to register to vote.
You can register to vote for federal, state, and local elections by mail; at your county, city, or township clerk's office; or by visiting any Secretary of State branch office.
For further information see the Michigan Secretary of State website
Washtenaw County Districts are:
U.S. Representative: 15 and 7
State Senator: 17 and 18
State Representative: 52,53,54,55