Colorado Cities
- Radium, CO
- Rago, CO
- Ramah, CO
- Rand, CO
- Randall, CO
- Rangely, CO
- Raymer, CO
- Raymond, CO
- Read, CO
- Red Cliff, CO
- Red Feather Lakes, CO
- Red Lion, CO
- Red Mountain, CO
- Red Wing, CO
- Redlands, CO
- Redmesa, CO
- Redmond, CO
- Redstone, CO
- Redvale, CO
- Reilly Canyon, CO
- Resurrection Mill, CO
- Rex, CO
- Rhone, CO
- Richfield, CO
- Rico, CO
- Ridgway, CO
- Rifle, CO
- Rinn, CO
- Rio Blanco, CO
- Riverdale, CO
- Riverside, CO
- Riverview, CO
- Robb, CO
- Roberta, CO
- Rock Creek Park, CO
- Rockdale, CO
- Rockland, CO
- Rockport, CO
- Rockvale, CO
- Rockwood, CO
- Rocky Ford, CO
- Roe, CO
- Rogers Mesa, CO
- Roggen, CO
- Rolla, CO
- Rollinsville, CO
- Romeo, CO
- Rosedale, CO
- Rosemont, CO
- Rosevale, CO
- Rosita, CO
- Roubideau, CO
- Rouse, CO
- Rowena, CO
- Roxborough Park, CO
- Roy, CO
- Ruby, CO
- Rugby, CO
- Rulison, CO
- Rush, CO
- Russell, CO
- Russell Gulch, CO
- Rustic, CO
- Ruxton, CO
- Rye, CO