Malibu Cinema, Hamilton. See Linden Theater.
Manse or the Old Manse, Oxford. See Coffee Mill House.
Maple Park and Maple Ridge
Maplewood. See Walden Ponds
Marcum Development and Education Center or the Joseph L. Marcum Development and Education Center, Ohio Casualty Group. See Hamilton Catholic High School
McDonald. See Donald
McGonigle Lock. See Rialto Lock 38.
McGuffey House. See McGuffey Museum.
McGuffey School. See Normal College of Miami University
McMaster Hall. See Veterans Village
Memorial Municipal Coliseum, Hamilton. See War Memorial Municipal Coliseum
Mercantile Buildings. See High Street Commercial Block
Merring's Mill. See Morgantown
Miami Canal and Miami Extension Canal. See Miami-Erie Canal
Miami Farms. See Campbell's Island
Miami Field. See Yager Stadium.
Miami Indian Reserve. See Big Miami Reserve.
Miami Inn. See Marcum Conference Center
Miami Lodges. See Veterans Village
Miami Naval Radio Training School. See Naval Radio Training School
Miami River. See Great Miami River
Miami Sesquicentennial Chapel . See Sesquicentennial Chapel
Miami Slaughterhouse. See Miami Purchase.
Miami University Airport. See Miami Airport
Miami University Hub. See Hub.
Miami University Sesquicentennial Chapel. See Sesquicentennial Chapel.
Miami Valley Children's Home. See Children's Home
Miami Valley Industrial Park. See Monroe Mega-Mall.
Miami Valley Institute. See Miami Valley College
Miami-Erie Canal Historic District. See Rialto
Miami Valley Chautauqua. See Chautauqua
Miamisburg Mound. See Miamisburg
Middletown Airport and Middletown Airport Park Inc. See Hook Field
Middletown Campus of Miami University or Miami University Middletown.
Middletown & Cincinnati Railway Co. See Middletown & Cincinnati Railroad Company
Middletown City Centre Mall. See City Centre Mall.
Middletown Hospital. See Middletown Regional Hospital
Middletown Junction in Butler County. See Middletown Station
Middletown Junction in Warren County.
Mile Square. See Oxford
Millikin's Island. See Campbell's Island
Mississippi Freedom Summer Project. See Freedom Summer Memorial
Monroe Casino. See Monroe Mega-Mall
Monte Carlo of Butler County. See Stockton Club
The Monument, Monument Cabin and Monument Park. See Soldiers, Sailors and Pioneers Monument
Moon House, Oxford. See Lottie Moon House
The Mother of Fraternities. See Miami University.
Muhlhauser Barn Conference Center. See Beckett Park
Murstein Senior Citizens Center. See Rossville Historic District