Places beginning with RO in Iowa, United States
- Roberts
- Robertson
- Robins
- Robinson
- Robison-Whitaker Acres
- Rochester
- Rochester, Township of
- Rockaway (historical)
- Rock Creek
- Rock Creek, Township of
- Rockdale
- Rock Falls
- Rockford
- Rockford, Township of
- Rockford, Township of
- Rock Grove, Township of
- Rockingham (historical)
- Rocklyn Mobile Home
- Rock Rapids
- Rockton
- Rock, Township of
- Rock, Township of
- Rock, Township of
- Rock, Township of
- Rock, Township of
- Rock Valley
- Rockville
- Rockwell
- Rockwell City
- Rodman
- Rodney
- Roelyn
- Rogers
- Rogersville
- Roland
- Roland, Township of
- Rolfe
- Rolfe, City of
- Rolfe (historical)
- Rolling Hills Mobile Home Park
- Rome
- Rome, Township of
- Roosevelt, Township of
- Rorbeck
- Roscoe
- Roscoe, Township of
- Rose
- Rose Grove, Township of
- Rose Hill
- Roselle
- Roselle, Township of
- Rosendale
- Rosetta (historical)
- Roseville
- Ross
- Rosserdale
- Rossie
- Ross, Township of
- Ross, Township of
- Rossville
- Rough Woods Hill
- Round Prairie, Township of
- Rowan
- Rowley
- Roxie
- Royal