| Utility | State | Customers | Residential rate |
|---|
| Raccoon Valley Electric Cooperative | IA | 2,788 | — |
| Raft Rural Elec Coop Inc | ID | 5,418 | 10.68¢ |
| Ralls County Electric Coop | MO | 6,657 | — |
| Rancho Cucamonga Municipal Utility | CA | 3,758 | — |
| Rancho Mirage Energy Authority | CA | 15,043 | 13.58¢ |
| Randolph Electric Member Corp | NC | 34,312 | 16.15¢ |
| Rappahannock Electric Coop | VA | 184,421 | 15.49¢ |
| Raton Public Service Company | NM | 4,275 | — |
| Ravalli County Elec Coop, Inc | MT | 12,194 | — |
| Rayle Electric Membership Corp | GA | 20,152 | 14.64¢ |
| REA Energy Coop Inc | PA | 22,872 | 16.14¢ |
| Realgy, LLC | IL | 1,023 | 8.42¢ |
| Red Lake Electric Coop, Inc | MN | 5,844 | — |
| Red River Valley Coop Pwr Assn | MN | 4,889 | — |
| Red River Valley Rrl Elec Assn | OK | 18,048 | 11.96¢ |
| Redwood Coast Energy Authority | CA | 61,886 | 13.83¢ |
| Redwood Electric Coop | MN | 4,482 | — |
| Redwood Falls Public Util Comm | MN | 2,892 | — |
| Reedsburg Utility Comm | WI | 5,728 | 12.36¢ |
| Reliant Energy Northeast LLC | PA | 547,853 | 12.91¢ |
| Reliant Energy Retail Services | TX | 1,646,366 | 18.38¢ |
| Renaissance Power & Gas, Inc. | PA | 11,199 | 11.73¢ |
| Renville-Sibley Coop Pwr Assn | MN | 1,890 | — |
| ResCom Energy, LLC | IL | 6,289 | 9.92¢ |
| Residents Energy, LLC | IL | 69,834 | 17.34¢ |
| Respond Power LLC | PA | 52,165 | 12.69¢ |
| Retail Energy Solutions, LLC | TX | 141,871 | 17.01¢ |
| Revolution Energy LLC | TX | 9,735 | 14.57¢ |
| Rhythm Ops LLC | TX | 113,550 | 16.55¢ |
| Rice Lake Utilities | WI | 6,085 | — |
| Rich Mountain Elec Coop, Inc | AR | 9,036 | — |
| Richland Electric Coop | WI | 3,911 | — |
| Rio Grande Electric Coop, Inc | TX | 14,671 | 18.29¢ |
| Rita Blanca Electric Coop, Inc | TX | 1,751 | 8.41¢ |
| Riverland Energy Cooperative | WI | 20,219 | 16.19¢ |
| Riverside Electric Cooperative | ID | 630 | — |
| Roanoke Electric Member Corp | NC | 14,065 | 20.70¢ |
| Robindale Retail Power Services, LLC | PA | 47 | — |
| Robison Energy, LLC | NY | 758 | 13.95¢ |
| Rochelle Municipal Utilities - (IL) | IL | 7,139 | 13.12¢ |
| Rochester Gas & Electric Corp | NY | 325,771 | 22.01¢ |
| Rochester Public Utilities | MN | 60,963 | 18.58¢ |
| Rock Energy Cooperative | IL | 18,357 | 14.58¢ |
| Rock Rapids Municipal Utility - (IA) | IA | 1,490 | — |
| Rockland Electric Co | NJ | 72,457 | 23.24¢ |
| Rolling Hills Electric Coop | KS | 11,477 | — |
| Roosevelt County Elec Coop Inc | NM | 6,004 | 13.54¢ |
| Roosevelt Irrigation District | AZ | 192 | — |
| Roosevelt Public Power Dist | NE | 3,518 | — |
| Roseau Electric Coop, Inc | MN | 6,748 | — |
| Rosebud Electric Coop Inc | SD | 5,697 | 11.88¢ |
| Roughrider Electric Cooperativ | ND | 15,326 | 10.82¢ |
| RPA Energy, Inc. | IL | 6,493 | 20.11¢ |
| Runestone Electric Assn | MN | 15,469 | 14.75¢ |
| Rural Electric Conven Coop - (IL) | IL | 6,011 | — |
| Rural Electric Coop, Inc - (OK) | OK | 12,674 | 11.93¢ |
| Rushmore Energy, LLC | OH | 15,916 | 12.03¢ |
| RushShelby Energy | IN | 15,051 | 16.36¢ |
| Rusk County Electric Coop, Inc | TX | 23,812 | 13.30¢ |
| Rutherford Elec Member Corp | NC | 77,777 | 13.02¢ |