MacArthur, Douglas 
Mackinaw City, Michigan 
Macomb, Illinois 
Macon, Georgia 
Madawaska, Maine 
Madison, Dolley 
Madison, Indiana 
Madison, James 
Madison, Wisconsin 
Madisonville, Kentucky 
Magazine Mountain, Arkansas 
Malcolm X 
Mammoth Cave N.P., Kentucky 
Manchester, Connecticut 
Manchester, New Hampshire 
Mandan, North Dakota 
Manhattan, Kansas 
Manistee, Michigan 
Manistique, Michigan 
Manitowoc, Wisconsin 
Mankato, Minnesota 
Mann, Horace 
Mansfield Hollow Lake, Connecticut 
Mansfield, Louisiana 
Mansfield, Mike 
Mansfield, Mount, Vermont 
Mansfield, Ohio 
Mansfield, Pennsylvania 
Marcy, Mount, New York 
Marietta, Georgia 
Marietta, Ohio 
Marinette, Wisconsin 
Marion, Indiana 
Marion, Lake, South Carolina 
Marion, Michigan 
Marion, Ohio 
Marquette, Jacques 
Marquette, Michigan 
Marshall, Missouri
Marshalltown, Iowa 
Marshfield, Wisconsin 
Marthas Vineyard, Massachusetts 
Martinsburg, West Virginia 
Martinsville, Virginia 
Maryville, Missouri 
Mason City, Iowa 
Massena, New York 
Massillon, Ohio 
Maui, Hawaii 
Mauna Kea, Hawaii 
Maxim, Sir Hiram 
Mayfield, Kentucky 
Mayville, North Dakota 
McAlester, Oklahoma 
McAllen, Texas 
McCarran, Patrick A. 
McCarthy, Mary 
McComb, Mississippi 
McCook, Nebraska 
McDonnel, James S. 
McGovern, George 
McKeesport, Pennsylvania 
McKinley, Mount, Alaska 
McMinnville, Oregon 
McMinnville, Tennessee 
McPherson, Kansas 
Mead, Lake, Nevada 
Meadville, Pennsylvania 
Medford, Oregon 
Melbourne, Florida 
Melville, Herman 
Memphis, Tennessee 
Memphremagog, Lake, Vermont 
Mentor, Ohio 
Merced, California 
Meredith, Lake, Texas 
Meriden, Connecticut 
Meridian, Mississippi 
Merrimack River, New Hampshire 
Mesa Verde N.P., Colorado 
Mesa, Arizona 
Mesabi Range, Minnesota 
Metairie, Louisiana 
Miami, Florida 
Miami, Oklahoma 
Michigan City, Indiana 
Middlebury, Vermont 
Middlesboro, Kentucky 
Middletown, Connecticut 
Middletown, New York 
Middletown, Ohio 
Midland, Texas 
Midler, Bette 
Milbank, South Dakota 
Miles City, Montana 
Milford, Delaware 
Mililani Town, Hawaii 
Military Ridge, Wisconsin 
Millay, Edna St. Vincent 
Mille Lacs Lake, Minnesota 
Milledgeville, Georgia 
Millinocket, Maine 
Mills, Robert 
Millwood Lake, Arkansas 
Milwaukee, Wisconsin 
Minden, Louisiana 
Mink, Patsy 
Minneapolis, Minnesota 
Minot, North Dakota 
Mississippi River, Arkansas 
Mississippi River, Illinois 
Mississippi River, Iowa 
Mississippi River, Louisiana 
Mississippi River, Minnesota 
Mississippi River, Mississippi 
Mississippi River, Missouri 
Mississippi River, Tennessee 
Mississippi River, Wisconsin 
Missoula, Montana 
Missouri Couteau, South Dakota 
Missouri River, Iowa 
Missouri River, Missouri 
Missouri River, Montana 
Missouri River, Nebraska 
Missouri River, North Dakota 
Missouri River, South Dakota 
Mitchell, Margaret 
Mitchell, Mount, North Carolina 
Mitchell, South Dakota 
Moab, Utah 
Moberly, Missouri 
Mobile, Alabama 
Mobridge, South Dakota 
Modesto, California 
Mohawk Valley, New York 
Mojave Desert, California 
Molokai, Hawaii 
Mondale, Walter 
Monitor Range, Nevada 
Monroe Lake, Indiana 
Monroe, James 
Monroe, Louisiana 
Monroe, Marilyn 
Monroe, Michigan 
Montauk, New York 
Monterey, California 
Montevideo, Minnesota 
Montgomery, Alabama 
Monticello, Arkansas 
Montpelier, Vermont 
Montrose, Colorado 
Moore Reservoir, New Hampshire 
Moorhead, Minnesota 
Moosehead Lake, Maine 
Morehead, Kentucky 
Morgan City, Louisiana 
Morgantown, North Carolina 
Morgantown, West Virginia 
Morris, Esther 
Morristown, New Jersey 
Morristown, Tennessee 
Moses Lake, Washington 
Moultree, Georgia 
Mount Desert Island, Maine 
Mount Rainier N.P., Washington 
Mount Vernon, Washington 
Mountain Home, Arkansas 
Mountain Home, Idaho 
Muncie, Indiana 
Murfreesboro, North Carolina 
Murfreesboro, Tennessee 
Murphy, North Carolina 
Murray, Lake, South Carolina 
Muskegon River, Michigan 
Muskogee, Oklahoma 
Myrtle Beach, South Carolina 
Mystic, Connecticut