| Surname | Township |
| Raglin | Mainshore |
| Rainwater | St. Francis |
| Raith | Ward 1 |
| Ramer | Hurricane |
| Ramsey | Hurricane, Mainshore, Ward 2 |
| Raski | Ward 2 |
| Raspberry | Hurricane |
| Rasson | Ward 1 |
| Rawls | Union |
| Ray | Friendship, Hurricane, Jones, Union |
| Raymer | Union |
| Raymon | Ward 1 |
| Readin | Mainshore |
| Reagan | Ward 1 |
| Reaves | Lake |
| Reddick | Lake |
| Reed | Jones, St. Francis, Ward 2 |
| Reeder | Hurricane, Ward 3 |
| Reefe? | Clarke |
| Reese | Hurricane |
| Reeves | Lake, Ward 1, Ward 2 |
| Reid | Jones |
| Reims | Lake |
| Relaford | Mainshore |
| Remagen | Lake, Mainshore |
| Renard | Union |
| Reno | Ward 1 |
| Reves | Friendship |
| Reynolds | Friendship, Hurricane, Mainshore, Spring Grove, Ward 2, Ward 3 |
| Rhea | Ward 2 |
| Rhodes | St. Francis |
| Rice | Clarke |
| Richards | Spring Grove |
| Richardson | Hurricane, Lake, Ward 1 |
| Richie | Ward 2 |
| Richmond | Lake |
| Rickey | Bryan |
| Rico | Friendship |
| Riddle | Blue Cane, Hurricane |
| Riggsbee | Ward 1 |
| Rightnow | St. Francis |
| Rigney | Union |
| Riley | Clarke |
| Risser? | Ward 2 |
| Ritter | Ward 1, Ward 2 |
| Roach | Shady Grove, Ward 2 |
| Robbins | Friendship, Ward 1 |
| Roberson | Cache |
| Roberts | Cache, Clarke, Friendship, Hurricane, Lake |
| Roberts | Salem, Spring Grove, St. Francis, Ward 1, Ward 3 |
| Robertson | Hurricane, Lake, Poland, Spring Grove, Union, Ward 1 |
| Robinson | Jones, Lake, Mainshore, Poland, Salem, St. Francis, Ward 1 |
| Rodgers | Cache, Friendship, Hurricane, St. Francis, Ward 1 |
| Roe | Cache, St. Francis, Ward 1 |
| Rogers | Lake, Spring Grove, St. Francis, Ward 2 |
| Rohmeyhr | Union |
| Roland | Clarke, Hurricane, Spring Grove |
| Rooker | Jones |
| Roper | Ward 2 |
| Roppe | Poland |
| Rorul | Cache |
| Rose | Friendship, St. Francis |
| Roseberry | Spring Grove |
| Rosenberg | Ward 1 |
| Roseperrie | Spring Grove |
| Rosey | Ward 2 |
| Ross | Hurricane, Ward 1, Ward 2 |
| Roston | Jones |
| Rothe | Lake |
| Rotzinger | Ward 1 |
| Roush | Union |
| Row | Union |
| Rowe | Bryan, Jones, Spring Grove, Union |
| Rowland | Clarke, Mainshore, Ward 2 |
| Rudisall | Union |
| Ruff | Clarke, Ward 1 |
| Rule | Mainshore |
| Rush | Union |
| Rushing | Clarke |
| Russell | Cache, Poland, Spring Grove, Union |
| Russom | Poland |
| Rust | Clarke, Hurricane |
| Rutherford | Clarke |
| Ruthledge | Union |
| Rutledge | Friendship, Hurricane, Ward 2 |
| Rutsinger ? | Ward 1 |
| Ryan | Poland, Salem, Ward 3 |
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