 bois blanc township is a civil township of mackinac county in the u.s. state of michigan. as of the 2000 census, bois blanc township's population was 71. the township is coterminous with bois blanc island. the nearby, smaller and uninhabited round island is within the civil jurisdiction of the city of mackinac island. bois blanc island's zip code is 49775. ==history==  "bois blanc" is french for "white wood". the name is commonly thought to be a reference to either: (a) the paper birch, or more likely (b) the basswood, called "bois blanc" in other contexts. the basswood's white underbark was extensively used by native americans and french-speaking fur traders for cordage, including the sewi
Townships_in_Mackinac_County,_Michigan Townships_in_Michigan