Delta Charter Township, officially known as the Charter Township of Delta and commonly known as simply Delta Township, is a charter township of Eaton County in the U.S. state of Michigan. As of the 2010 census, it had a population of 32,408 making it the most populous municipality in Eaton County. The township operates its own fire department, but contracts with the Eaton County Sheriff Department for police protection. The township is a major community in metropolitan Lansing.