Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Shackelford Reservoir | Reservoir | 841 | Hitchcock | 40 16 30 N | 101 03 38 W |
| Shadley Reservoir | Reservoir | 739 | Dawson | 41 02 12 N | 099 30 49 W |
| Shaw Reservoir | Reservoir | 587 | Adams | 40 23 48 N | 098 36 37 W |
| Shell Lake | Reservoir | 1065 | Cherry | 42 54 54 N | 102 02 02 W |
| Shepherd Reservoir | Reservoir | 1281 | Sioux | 42 51 60 N | 103 59 38 W |
| Sherman Reservoir | Reservoir | 750 | Dawson | 40 52 12 N | 099 40 55 W |
| Sherman Reservoir | Reservoir | 550 | Hamilton | 41 01 24 N | 098 02 19 W |
| Sherman Reservoir | Reservoir | 659 | Sherman | 41 18 12 N | 098 52 01 W |
| Sherman Reservoir | Reservoir | 638 | Sherman | 41 18 12 N | 098 52 54 W |
| Shields Reservoir | Reservoir | 797 | Red Willow | 40 04 30 N | 100 32 20 W |
| Shurigar Brothers Lake | Reservoir | 607 | Adams | 40 30 48 N | 098 39 19 W |
| Sibert Reservoir | Reservoir | 543 | Webster | 40 03 06 N | 098 37 07 W |
| Sidney East Reservoir | Reservoir | 1265 | Cheyenne | 41 09 12 N | 102 59 26 W |
| Sidney West Reservoir | Reservoir | 1276 | Cheyenne | 41 09 06 N | 102 59 38 W |
| Sieber Reservoir | Reservoir | 475 | Fillmore | 40 22 24 N | 097 28 25 W |
| Siebrass Reservoir | Reservoir | 593 | Webster | 40 16 24 N | 098 28 01 W |
| Siedhoff Reservoir | Reservoir | 438 | Saline | 40 38 06 N | 097 00 37 W |
| Simonsen Reservoir | Reservoir | 537 | Nuckolls | 40 06 42 N | 097 57 37 W |
| Sindt Reservoir | Reservoir | 562 | Franklin | 40 03 24 N | 098 52 25 W |
| Singleton Reservoir Number 1 | Reservoir | 1378 | Banner | 41 25 24 N | 103 28 56 W |
| Skalka Reservoir | Reservoir | 529 | Clay | 40 23 12 N | 098 07 19 W |
| Skalka Reservoir | Reservoir | 531 | Nuckolls | 40 19 54 N | 098 08 07 W |
| Skavdahl Reservoir | Reservoir | 1341 | Sioux | 42 26 06 N | 103 42 56 W |
| Skinner Reservoir | Reservoir | 347 | Burt | 41 41 06 N | 096 15 07 W |
| Skochdopole Reservoir | Reservoir | 653 | Buffalo | 40 55 30 N | 098 57 19 W |
| Skolnik Reservoir | Reservoir | 470 | Seward | 41 00 48 N | 097 06 55 W |
| Skolnik Reservoir | Reservoir | 473 | Seward | 41 02 00 N | 097 05 37 W |
| Skyview Lake | Reservoir | 483 | Madison | 42 02 18 N | 097 26 13 W |
| Sloan Reservoir | Reservoir | 680 | Keya Paha | 42 55 18 N | 099 43 55 W |
| Smith Lake | Reservoir | 1156 | Sheridan | 42 24 42 N | 102 27 32 W |
| Smith Reservoir | Reservoir | 870 | Hayes | 40 23 48 N | 101 06 32 W |
| Smith Reservoir | Reservoir | 716 | Red Willow | 40 13 42 N | 100 17 20 W |
| Smith Reservoir Number 1 | Reservoir | 586 | Holt | 42 45 48 N | 099 03 25 W |
| Snook Reservoir | Reservoir | 1134 | Dawes | 42 59 30 N | 103 28 32 W |
| Snook Reservoir | Reservoir | 1133 | Dawes | 42 59 33 N | 103 28 36 W |
| Snyder Group Reservoir | Reservoir | 770 | Brown | 42 36 06 N | 099 56 49 W |
| Snyder Reservoir | Reservoir | 417 | Gage | 40 08 00 N | 096 49 31 W |
| Snyder Reservoir | Reservoir | 377 | Lancaster | 40 58 30 N | 096 36 13 W |
| Snyder Reservoir | Reservoir | 1238 | Sioux | 42 50 24 N | 103 56 26 W |
| Snyder Reservoir | Reservoir | 336 | Washington | 41 24 30 N | 096 00 49 W |
| South Fork Reservoir 11-1 | Reservoir | 356 | Pawnee | 40 03 54 N | 096 04 31 W |
| South Fork Reservoir 2-10 | Reservoir | 357 | Pawnee | 40 04 54 N | 096 06 49 W |
| South Fork Reservoir 2-6 | Reservoir | 366 | Pawnee | 40 04 30 N | 096 06 49 W |
| South Fork Reservoir 4-2 | Reservoir | 339 | Pawnee | 40 04 00 N | 096 03 25 W |
| Souther Reservoir | Reservoir | 1086 | Dawes | 42 42 60 N | 103 21 08 W |
| Speas Reservoir | Reservoir | 1277 | Sioux | 42 45 36 N | 103 34 14 W |
| Spencer Reservoir | Reservoir | 792 | Red Willow | 40 16 00 N | 100 43 02 W |
| Spieker Reservoir | Reservoir | 560 | Boone | 41 49 18 N | 098 05 49 W |
| Sponheinmer Reservoir | Reservoir | 366 | Lancaster | 40 58 12 N | 096 34 37 W |
| Sprick Reservoir | Reservoir | 376 | Washington | 41 35 60 N | 096 17 37 W |
| Spring Creek Reservoir | Reservoir | 994 | Dawes | 42 52 06 N | 103 04 32 W |
| Spring Creek Reservoir | Reservoir | 1290 | Sioux | 42 45 48 N | 103 49 32 W |
| Spring Creek Reservoir 10-1 | Reservoir | 336 | Johnson | 40 28 12 N | 096 08 13 W |
| Spring Creek Reservoir 11-A | Reservoir | 803 | Dawson | 41 00 42 N | 099 58 19 W |
| Spring Creek Reservoir 18-A | Reservoir | 806 | Dawson | 41 00 30 N | 100 00 31 W |
| Spring Creek Reservoir 19-B | Reservoir | 805 | Dawson | 41 00 48 N | 100 00 55 W |
| Spring Creek Reservoir 2-3 | Reservoir | 317 | Johnson | 40 31 06 N | 096 04 19 W |
| Spring Creek Reservoir 25-A | Reservoir | 850 | Custer | 41 08 24 N | 100 04 01 W |
| Spring Creek Reservoir 3-1 | Reservoir | 320 | Johnson | 40 30 18 N | 096 05 49 W |
| Spring Creek Reservoir 4-1 | Reservoir | 339 | Johnson | 40 28 54 N | 096 05 07 W |
| Spring Creek Reservoir 4-3 | Reservoir | 319 | Johnson | 40 30 12 N | 096 05 01 W |
| Spring Creek Reservoir 5-2 | Reservoir | 357 | Johnson | 40 26 30 N | 096 04 37 W |
| Spring Creek Reservoir 5-3 | Reservoir | 354 | Johnson | 40 26 36 N | 096 04 31 W |
| Spring Creek Reservoir 5-A | Reservoir | 327 | Johnson | 40 27 42 N | 096 05 55 W |
| Spring Creek Reservoir 6-2 | Reservoir | 341 | Johnson | 40 27 18 N | 096 07 49 W |
| Spring Creek Reservoir 6-A | Reservoir | 343 | Johnson | 40 26 00 N | 096 06 07 W |
| Spring Creek Reservoir 7-B | Reservoir | 343 | Johnson | 40 25 60 N | 096 07 49 W |
| Spring Creek Reservoir 7-C | Reservoir | 346 | Johnson | 40 26 06 N | 096 08 07 W |
| Spring Creek Reservoir 8-1 | Reservoir | 356 | Johnson | 40 24 12 N | 096 07 37 W |
| Spring Creek Reservoir 8-A | Reservoir | 358 | Johnson | 40 23 42 N | 096 08 31 W |
| Spring Creek Reservoir 9-2 | Reservoir | 377 | Johnson | 40 21 36 N | 096 07 37 W |
| Spring Creek Reservoir 9-3 | Reservoir | 375 | Johnson | 40 21 24 N | 096 06 43 W |
| Spring Creek Reservoir 9-4 | Reservoir | 356 | Johnson | 40 23 12 N | 096 06 43 W |
| Spring Creek Reservoir 9-5 | Reservoir | 364 | Johnson | 40 23 24 N | 096 06 49 W |
| Spring Creek Reservoir 9-6 | Reservoir | 368 | Johnson | 40 22 48 N | 096 07 25 W |
| Spring Creek Reservoir 9-A | Reservoir | 796 | Dawson | 40 59 00 N | 099 57 01 W |
| Spring Creek Reservoir 9-A | Reservoir | 356 | Johnson | 40 22 30 N | 096 06 49 W |
| Squaw Creek Reservoir | Reservoir | 1140 | Dawes | 42 40 36 N | 103 22 26 W |
| Stagecoach Lake | Reservoir | 392 | Lancaster | 40 36 18 N | 096 38 13 W |
| Stagecoach Lake | Reservoir | 392 | Lancaster | 40 36 17 N | 096 38 12 W |
| Stagemeyer Reservoir | Reservoir | 696 | Gosper | 40 23 48 N | 099 59 25 W |
| Stamford Reservoir 2-A | Reservoir | 630 | Harlan | 40 08 54 N | 099 35 01 W |
| Stamford Reservoir 3-A | Reservoir | 636 | Harlan | 40 08 54 N | 099 35 55 W |
| Standing Bear Lake | Reservoir | 327 | Douglas | 41 18 53 N | 096 07 20 W |
| Standing Bear Reservoir | Reservoir | 330 | Douglas | 41 18 54 N | 096 07 19 W |
| Stastny Reservoir | Reservoir | 478 | Butler | 41 04 00 N | 097 06 07 W |
| Staubitz and Holmes Reservoir | Reservoir | 662 | Buffalo | 40 44 06 N | 099 05 25 W |
| Staudenmaier Reservoir | Reservoir | 1177 | Sioux | 42 50 30 N | 103 40 50 W |
| Steffan Reservoir | Reservoir | 413 | Knox | 42 46 42 N | 097 30 43 W |
| Steffensen Reservoir | Reservoir | 1265 | Dawes | 42 35 12 N | 102 56 56 W |
| Stevens Reservoir | Reservoir | 526 | Polk | 41 08 12 N | 097 49 43 W |
| Stewart Reservoir | Reservoir | 1046 | Dawes | 42 49 06 N | 103 17 26 W |
| Stiver North Reservoir | Reservoir | 1229 | Scotts Bluff | 41 51 60 N | 103 47 56 W |
| Stiver South Reservoir | Reservoir | 1263 | Scotts Bluff | 41 51 12 N | 103 48 50 W |
| Stoltenberg Reservoir | Reservoir | 581 | Boyd | 42 57 06 N | 099 02 13 W |
| Stoltz Reservoir | Reservoir | 613 | Antelope | 41 55 12 N | 098 10 55 W |
| Stone Reservoir | Reservoir | 572 | Howard | 41 22 54 N | 098 23 01 W |
| Stratbucker Reservoir | Reservoir | 321 | Washington | 41 26 48 N | 096 00 37 W |
| Stuckey Reservoir | Reservoir | 504 | Fillmore | 40 39 18 N | 097 42 07 W |
| Stuhr Reservoir | Reservoir | 522 | York | 40 56 48 N | 097 48 13 W |
| Sturtevant Reservoir | Reservoir | 662 | Furnas | 40 11 00 N | 099 43 55 W |
| Sughrone Reservoir Number 2 | Reservoir | 773 | Red Willow | 40 08 48 N | 100 25 20 W |
| Sughroue Reservoir | Reservoir | 803 | Frontier | 40 25 06 N | 100 26 14 W |
| Sukup Reservoir | Reservoir | 475 | Knox | 42 33 12 N | 098 09 25 W |
| Sukup Reservoir | Reservoir | 483 | Knox | 42 33 48 N | 098 07 37 W |
| Summit Lake | Reservoir | 344 | Burt | 41 45 54 N | 096 17 07 W |
| Sutherland Reservoir | Reservoir | 940 | Lincoln | 41 07 36 N | 101 08 14 W |
| Sutherland Reservoir | Reservoir | 933 | Lincoln | 41 06 18 N | 101 06 20 W |
| Swan Creek Reservoir 5-C | Reservoir | 445 | Saline | 40 30 36 N | 097 15 07 W |
| Swan Creek Reservoir 6-C | Reservoir | 449 | Saline | 40 30 36 N | 097 14 25 W |