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- Raglan Township, Harrison County
- Ramsey Township, Kossuth County
- Rawles Township, Mills County
- Read Township, Clayton County
- Reading Township, Calhoun County
- Reading Township, Sioux County
- Red Oak Township, Cedar County
- Red Oak Township, Montgomery County
- Red Rock Township, Marion County
- Reeve Township, Franklin County
- Remsen Township, Plymouth County
- Rice Township, Ringgold County
- Richland Township, Adair County
- Richland Township, Carroll County
- Richland Township, Chickasaw County
- Richland Township, Decatur County
- Richland Township, Delaware County
- Richland Township, Dickinson County
- Richland Township, Franklin County
- Richland Township, Guthrie County
- Richland Township, Jackson County
- Richland Township, Jasper County
- Richland Township, Jones County
- Richland Township, Keokuk County
- Richland Township, Lyon County
- Richland Township, Mahaska County
- Richland Township, Sac County
- Richland Township, Story County
- Richland Township, Tama County
- Richland Township, Wapello County
- Richland Township, Warren County
- Richman Township, Wayne County
- Riley Township, Ringgold County
- Ripley Township, Butler County
- Riverdale Township, Kossuth County
- Riverside Township, Fremont County
- Riverside Township, Lyon County
- Riverton Township, Clay County
- Riverton Township, Floyd County
- Riverton Township, Fremont County
- Rochester Township, Cedar County
- Rock Township, Cherokee County
- Rock Township, Lyon County
- Rock Township, Mitchell County
- Rock Township, Sioux County
- Rock Township, Woodbury County
- Rock Creek Township, Jasper County
- Rock Grove Township, Floyd County
- Rockford Township, Floyd County
- Rockford Township, Pottawattamie County
- Rockingham Township, Scott County
- Roland Township, Webster County
- Rome Township, Jones County
- Roosevelt Township, Pocahontas County
- Roscoe Township, Davis County
- Rose Grove Township, Hamilton County
- Roselle Township, Carroll County
- Ross Township, Franklin County
- Ross Township, Taylor County
- Round Prairie Township, Jefferson County
- Rudd Township, Floyd County
- Rush Lake Township, Palo Alto County
- Rutland Township, Humboldt County
- Rutland Township, Woodbury County
Read more about this topic: List Of Iowa Townships