| Ruila F-313 borehole | Estonia | 59.2038, 24.4312 | 6 | 15 | 10 | 8 | |
| Rannapungerja 76 borehole | Estonia | 58.9937, 27.1596 | 19 | 38 | 69 | 115 | |
| Rumba 307 borehole | Estonia | 58.7395, 24.0773 | 27 | 146 | 271 | 478 | |
| Rummu borehole | Estonia | 59.2314, 24.2072 | 6 | 31 | 140 | 92 | |
| Rummu X borehole | Estonia | 59.2307, 24.1950 | 0 | 0 | 0 | 0 | |
| Rummu XX borehole | Estonia | 59.2293, 24.2340 | 0 | 0 | 0 | 0 | |
| Ruskavere 451 borehole | Estonia | 58.7601, 26.8901 | 10 | 141 | 234 | 326 | |
| Rybinsk 1 borehole | Russia | | 2 | 0 | 0 | 0 | |
| Rägavere borehole | Estonia | 59.3376, 26.3934 | 0 | 30 | 9 | 9 | |
| Räsna F-166 borehole | Estonia | 59.2114, 25.8599 | 8 | 6 | 13 | 13 | |
| Räätsma 313 borehole | Estonia | 59.2449, 27.5663 | 9 | 6 | 34 | 34 | |
| Saia 693 borehole | Estonia | | 2 | 0 | 0 | 0 | |
| Sista-Palkino 24 borehole | Russia | 59.8004, 28.9105 | 3 | 19 | 13 | 14 | |
| Ruhnu 500 borehole | Estonia | 57.8032, 23.2414 | 86 | 1146 | 1658 | 2502 | |
| Sääre 572 borehole | Estonia | 57.9100, 22.0543 | 1 | 0 | 5 | 5 | |
| Saare 772 borehole | Estonia | 58.4280, 23.0961 | 2 | 0 | 8 | 8 | |
| Saare 773 borehole | Estonia | 58.4463, 23.1023 | 0 | 0 | 0 | 0 | |
| Saare 937 borehole | Estonia | 58.4345, 23.1114 | 0 | 0 | 0 | 0 | |
| Sääre F-355 borehole | Estonia | 58.9667, 22.9161 | 3 | 0 | 109 | 105 | |
| Saare K126 borehole | Estonia | 58.9694, 22.8998 | 0 | 0 | 0 | 0 | |
| Saare K20 borehole | Estonia | 58.9705, 22.9307 | 6 | 103 | 4 | 0 | |
| Saare K43 borehole | Estonia | 58.9656, 22.9148 | 0 | 1 | 0 | 0 | |
| Sadala 3314 borehole | Estonia | 58.8681, 26.6013 | 5 | 4 | 0 | 0 | |
| Sae F-183 borehole | Estonia | 59.2660, 26.6533 | 9 | 2 | 17 | 21 | |
| Saha borehole | Estonia | 59.4211, 24.9832 | 0 | 0 | 0 | 0 | |
