Here is the Washington County website http://www.co.washington.wi.us/ for you to view.
Here is the city website for Germantown, WI http://www.village.germantown.wi.us/
Looking for some Washington County census info http://quickfacts.census.gov/qfd/states/55/55131.html then this website will assist you. If you are looking for census information in another state, feel free to check out this website http://quickfacts.census.gov/qfd/states/ for a specifice state or city.
Looking to view what's going on in the State of Wisconsin http://www.wisconsin.gov/state/home/app?COMMAND=gov.wi.state.cpp.command.LoadPortalHome this is the website that can help you out.