- Athens State Park, a park in Clark County
- Boney Branch, a stream in Atchison County
- Campbell Lake, a reservoir in Mercer County
- Cottonwood School (historical), a school in Nodaway County
- Ditch Number 17, a canal in Butler County
- Etna School, a school in Scotland County
- Hazel Hill School (historical), a school in Scotland County
- Lac Michel, a reservoir in Saint Francois County
- Last Chance School (historical), a school in Lincoln County
- Lateral Number 18, a canal in Dunklin County
- Lick Creek, a stream in Wayne County
- Little Barren School (historical), a school in Ripley County
- Little Branch, a stream in Oregon County
- Little Carver Creek, a stream in Iron County
- Little Creek, a stream in Iron County
- Little Dixie Lake, a reservoir in Callaway County
- Little Hazel Creek, a stream in Washington County
- Little Indian Creek, a stream in Shannon County
- Little Lost Creek, a stream in Warren County
- Little Otter Creek, a stream in Monroe County
- Little Prairie Slough, an inlet in Pike County
- Little School (historical), a school in Butler County
- Little Sinking Creek, a stream in Shannon County
- Little Third Creek, a stream in Osage County
- Lochwinnoch Reservoir, a reservoir in Callaway County
- Locust Grove School, a school in Macon County
- Lone Star School, a school in Atchison County
- Long Branch, a stream in Chariton County
- Metham School (historical), a school in Dent County
- Meyers Spring, a spring in Osage County
- Middle Branch, a stream in Boone County
- Middle Brushy Creek, a stream in Wayne County
- Middle Fork Big Creek, a stream in Madison County
- Middle Fork Fourche Creek, a stream in Ripley County
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- Middle Fork Little Chariton River, a stream in Chariton County
- Middle Fork Salt River, a stream in Monroe County
- Middle Fork Webb Creek, a stream in Reynolds County
- Middle Prong Brushy Creek, a stream in Shannon County
- Middle River, a stream in Callaway County
- Middle School, a school in Dent County
- Middlebrook Creek, a stream in Saint Francois County
- Middletown School (historical), a school in Boone County
- Mill Branch, a stream in Reynolds County
- Mill Creek, a stream in Sainte Genevieve County
- Miller Community Lake State Wildlife Area, a park in Carter County
- Miller Lake, a reservoir in Carter County
- Millers Lake, a reservoir in Randolph County
- Milligan Creek, a stream in Monroe County
- Millwood School, a school in Lincoln County
- Milton School, a school in Randolph County
- Mina Sauk Falls, an overfalls in Iron County
- Mine La Motte Dam, a reservoir in Madison County
- Mine Lamotte Lake, a reservoir in Madison County
- Minefree School, a school in Chariton County
- Mineola State Wildlife Area, a park in Montgomery County
- Mineral Point Elementary School, a school in Washington County
- Mingo Ditch, a canal in Stoddard County
- Mingo Swamp, a swamp in Wayne County
- Mink Creek, a stream in Wayne County
- Minnehaha Lake, a reservoir in Sainte Genevieve County
- Minnow Branch, a stream in Marion County
- Minor Creek, a stream in Iron County
- Mononame 43 Lake, a reservoir in Sullivan County
- New Milan Reservoir, a reservoir in Sullivan County
- Owasco School (historical), a school in Sullivan County
- Pleasant Valley School, a school in Harrison County
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