Elected Officials -- How to Determine
http://www.cityofmadison.com/election/election/electionWho.cfm -- Website lists the Alderperson, County Supervisor, State Assembly Person and State Senator for residents of Madison, based on the address they provide. Will also provide the ward and district the address is in.
https://myvote.wi.gov/ -- Lists voting districts and current office holders for registered voters (anonymous look up by address are also available).
http://www.legis.state.wi.us/w3asp/waml/waml.aspx -- search for your state legislator