- Baugh Branch, a stream in Putnam County
- Brooklyn School (historical), a school in Harrison County
- Central School, a school in Lewis County
- Davis Branch, a stream in Adair County
- Ditch Number 2, a canal in Ripley County
- Fairview School, a school in Atchison County
- Independence School (historical), a school in Schuyler County
- Lateral Number 2, a canal in Stoddard County
- Lawson School (historical), a school in Audrain County
- Lick Fork, a stream in Boone County
- Little Bear Creek, a stream in Montgomery County
- Long Branch, a stream in Putnam County
- Missouri Branch, a stream in Reynolds County
- Morris Spring, a spring in Reynolds County
- Mount Joy School (historical), a school in Nodaway County
- Muldrow School (historical), a school in Ralls County
- Mussel Fork, a stream in Chariton County
- Myers High School, a school in Howard County
- Nagel School (historical), a school in Macon County
- Nash School (historical), a school in Macon County
- Neal Pond, a lake in Pike County
- North Bethel School (historical), a school in Sullivan County
- North Crossroads School (historical), a school in Dent County
- North End School, a school in Randolph County
- North Fork, a stream in Randolph County
- North Fork Charrette Creek, a stream in Warren County
- North Fork Crooked Creek, a stream in Livingston County
- North Fork Fourche a Renault, a stream in Washington County
- North Fork Guinns Creek, a stream in Pike County
- North Fork Little Barren Creek, a stream in Ripley County
- North Fork Salt River, a stream in Monroe County
- North Fork Webb Creek, a stream in Reynolds County
- North Glendale School, a school in Saint Louis County
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- Number 220 Reservoir, a reservoir in Montgomery County
- Number 224 Reservoir, a reservoir in Montgomery County
- Number 31 Lake (historical), a reservoir in Sainte Genevieve County
- Number 46 Lake, a reservoir in Reynolds County
- Number 49 Lake, a reservoir in Reynolds County
- Number 56 Lake, a reservoir in Livingston County
- Number 7 Washer Reservoir, a reservoir in Washington County
- Number Two Lake, a reservoir in Lincoln County
- O'Bryan School (historical), a school in Chariton County
- O'Hara Lake, a reservoir in Randolph County
- O'Rear School (historical), a school in Boone County
- Oak Grove School (historical), a school in Reynolds County
- Oak Hill School, a school in Butler County
- Oak Hill School (historical), a school in Oregon County
- Oak Ridge School, a school in Marion County
- Oak Ridge School (historical), a school in Butler County
- Oak Spring, a spring in Carter County
- Oak Spring Branch, a stream in Carter County
- Oakdale School (historical), a school in Butler County
- Oakdell School (historical), a school in Marion County
- Oakgrove School, a school in Sainte Genevieve County
- Oakland School (historical), a school in Saint Charles County
- Oakridge Estates Lake, a reservoir in Saint Charles County
- Oakville High School, a school in Saint Louis County
- Oakville Junior High School, a school in Saint Louis County
- Oakville School, a school in Saint Louis County
- Oakwood School, a school in Macon County
- Oasis Lake, a lake in Lincoln County
- Oates School (historical), a school in Reynolds County
- Pecks Branch, a stream in Harrison County
- Prairie Center School, a school in Daviess County
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