The population of Okemos, Michigan on December 15th 2011 is approximately 22,805. (Extrapolated from a 2000 US census population of 22,805 and a population of 22,805 on January 28th 2011.)
Not entirely, while the state borders the lake, so does Illinois. Bodies of water are a part of the US as a whole and are usually divided down the middle. The US Coast Guard is responsible for safety...