American Bison

The American Bison (Bison bison bison) is also known as the American Buffalo, although it is only a distant cousin to true buffalo. There are 2 subspecies of bison, with 3 total species altogether. The subspecies are Plains Bison (Bison bison bison) and Wood Bison (Bison bison athabascae). The third species of bison is the European bison, or Wisent (Bison bonasus).
Of the North American species, only the Wood Bison is considered endangered. A herd of 200 was found in 1957 in Alberta, Canada. They were thought to be extinct.
The Plains Bison was on the verge of extinction, but has been spared due to conservation efforts. This majestic animal is a truly American icon. It feed, housed and clothed the native Americans for centuries.
The Bison is the heaviest terrestrial mammal on the north American continent.
They swim well and are nomadic grazers, hence the name 'Plains Bison'.

Zoos where they can be seen are:

Alaska region
Reindeer Farm Palmer, Alaska

Pacific region
Greater Vancouver Zoo Aldergrove B.C., Canada
Olympic Game Farm Sequim, Washington
Northwest Trek Eatonville, Washington
Wildlife Safari Winston, Oregon
Moonridge Animal Park  Big Bear Lake, California features the Wood Bison (Bison bison athabascae)
Oakland Zoo  Oakland, California

Mountain region
Grand Canyon Deer Farm  Williams, Arizona
Denver Zoo  Denver, Colorado
Pueblo Zoo  Pueblo, Colorado 

Central region
Dakota Zoo  Bismarck, North Dakota
Roosevelt Park Zoo  Minot, North Dakota
Bear Country U.S.A.  Rapid City, South Dakota
Bramble Park Zoo  Watertown, South Dakota
Sedgwick County Zoo  Wichita, Kansas 
Amarillo Zoo  Amarillo, Texas
Caldwell Zoo  Tyler, Texas
Cameron Park Zoo  Waco, Texas
Minnesota Zoo  Apple Valley, Minnesota 
Wild Wilderness Drive Through Safari  Gentry, Arkansas
Baton Rouge Zoo  Baton Rouge, Louisiana 
Louisiana purchase Zoo  Monroe, Louisiana 
Henry Vilas Zoo  Madison, Wisconsin
Lincoln Park Zoo  Manitowoc, Wisconsin
Wildwood Park Zoo  Marshfield, Wisconsin 
Brookfield Zoo  Brookfield, Illinois
Wildlife Prairie State Park  Hanna City (Peoria), Illinois
Montgomery Zoo  Montgomery, Alabama

Eastern region
Garlyn Farm Zoo  Naubinway, Michigan
Columbus Zoo & Aquarium  Columbus, Ohio
The Wilds  Cumberland, Ohio
Tennessee Safari Park  Alamo, Tennessee 
Claws 'N Paws  Hamlin, Pennsylvania
Living Treasures Wild Animal Park  New Castle, Pennsylvania
Elmwood Park Zoo  Elmwood Park, Pennsylvania
Buffalo Zoo  Buffalo, New York
Bronx Zoo  New York, New York
Queens Zoo  New York, New York
Long Island Game Farm  New York, New York
Buttonwood Park Zoo  New Bedford, Massachusetts 
Roger Williams Park Zoo  Providence, Rhode Island
Space Farms Zoo  Sussex, New Jersey
Turtle back Zoo  West Orange/ Sussex, New Jersey
Salisbury Zoo  Salisbury, Maryland
The National Zoo  Washington D.C.
Virginia Zoo  Norfolk, Virginia
Richmond Metro Zoo  Richmond, Virginia 
Virginia Safari Park  Natural Bridge, Virginia
West Virginia Zoo  Kingwood, West Virginia
North Carolina Zoo  Asheboro, North Carolina
Chehaw Wild Animal Park  Chehaw, Georgia
Wild Animal Safari  Pine Mountain, Georgia 
Beardsley Zoo  Bridgeport, Connecticut