Places beginning with SO in Missouri, United States
- Solo
- Somerset, Township of
- Sonora
- Sorrell
- Souder
- Southard
- South Benton, Township of
- South Benton, Township of
- South Blanchard (historical)
- South Carrollton
- South Drexel
- Southeast Marion, Township of
- South Elkhorn, Township of
- South Fork
- South Fork, Township of
- South Fork, Township of
- South Fork, Township of
- South Galloway, Township of
- South Greene, Township of
- South Greenfield
- Southhampton
- South Lee
- South Liberty
- South Lindsey, Township of
- South Lineville
- South Linn, Township of
- South Moniteau, Township of
- South Morgan, Township of
- South Point (historical)
- South River
- South River, Township of
- South Shore
- South Sugar Creek, Township of
- South, Township of
- South Troy
- South Van Buren
- South West City
- Southwest Marion, Township of
- South West, Township of