Bloomfield Township is a charter township of Oakland County in the U.S. state of Michigan. As of the 2010 census, the township population was 41,070. This area often referred to simply as "Bloomfield" by residents and visitors alike. This Metro Detroit township was organized in 1827, the first township to be established in Oakland County. It almost completely surrounds the city of Bloomfield Hills. In 2010, Bloomfield Township was ranked the most expensive community in which to live in the state of Michigan.