Places beginning with RO in Missouri, United States
- Roach
- Roads
- Roanoke
- Roaring River, Township of
- Roark, Township of
- Robberson No. 1A, Township of
- Robberson No. 1B, Township of
- Robberson Number 1, Township of
- Robberson Number 2, Township of
- Robbins
- Robertson
- Robertsville
- Robidoux
- Roblee
- Roby
- Rocheport
- Rochester
- Rochester, Township of
- Rock
- Rockaway Beach
- Rockbridge
- Rock Bridge, Township of
- Rock Creek
- Rock Creek Junction
- Rockford
- Rock Ford
- Rockford Beach
- Rockford (historical)
- Rockford, Township of
- Rockford, Township of
- Rock Hill
- Rockingham
- Rock Port
- Rock Prairie
- Rock Prairie, Township of
- Rock Springs
- Rock Springs (subdivision)
- Rock, Township of
- Rockview
- Rockville
- Rockville, Township of
- Rocky Comfort
- Rocky Ford (historical)
- Rocky Fork, Township of
- Rocky Mount
- Rocky Mount
- Rocky Ridge Ranch
- Rodger Ford (historical)
- Rogersville
- Rolla
- Rolla, Township of
- Romance
- Rombauer
- Rome
- Rondo
- Rookins
- Roosevelt
- Roosterville
- Rosati
- Roscoe
- Roscoe, Township of
- Roseberry
- Rosebud
- Rose Hill
- Rose Hill, Township of
- Roseland
- Roselle
- Rosendale
- Roseville
- Rosewood
- Ross Bridge
- Ross (historical)
- Rossville
- Rothville
- Roubidoux
- Roubidoux, Township of
- Roubidoux, Township of
- Round Bottom Ford (historical)
- Round Grove
- Round Grove, Township of
- Round Grove, Township of
- Round Prairie, Township of
- Round Spring
- Rousertown
- Rover
- Rowena
- Rowland
- Roxie (historical)
- Roy
- Royal
- Royal Oak