Collection place
- Mad River, Humboldt County, California1 objects
- Madera County, California7 objects
- Magata, Mishima, Onuma District2 objects
- Malay Peninsula, Southeast Asia3 objects
- Malaysia3 objects
- Maple Creek, Mad River, Humboldt County1 objects
- Mariposa County, California4 objects
- Mariposa, Mariposa County, California1 objects
- McKinley County, New Mexico3 objects
- Melanesia22 objects
- Mendocino County, California14 objects
- Mesa Grande, San Diego County, California1 objects
- Mexico6 objects
- Micronesia4 objects
- Middle East4 objects
- Milne Bay Province, Papua Region, Papua New Guinea1 objects
- Minamiaizu District, Fukushima Prefecture, South Tohoku7 objects
- Mindoro Island, Luzon island group, Philippines2 objects
- Mishima, Onuma District, Fukushima Prefecture4 objects
- Miya village (historical), Ichinomiyamachi, Takayama, Gifu Prefecture1 objects