How deep are wells in Ohio? Depth by county from 168,404 state well logs
The Ohio Department of Natural Resources keeps the logs drillers file for domestic water wells with a mapped location. Across the 167,352 that give a depth, the median Ohio well is 110 feet deep, and the middle 80% run from 55 to 228 feet. 85 of 88 counties have 30 or more logs and appear in the table.
110 ft median depth, statewide
55 to 228 ft 10th to 90th percentile
35 ft median static water level
168,404 logs in 88 counties
Deepest and shallowest counties by median depth
Among the 85 counties with 30 or more logs that give a depth. The logs column is the count behind each median.
| Deepest | Median depth | Logs | Shallowest | Median depth | Logs |
|---|---|---|---|---|---|
| Vinton | 340 ft | 565 | Warren | 55 ft | 1,200 |
| Hocking | 280 ft | 1,800 | Ashtabula | 60 ft | 1,864 |
| Tuscarawas | 200 ft | 3,140 | Butler | 61 ft | 679 |
| Jackson | 180 ft | 64 | Paulding | 62 ft | 982 |
| Carroll | 177 ft | 1,890 | Crawford | 63 ft | 961 |
Every Ohio county with 30 or more logs
Depth is the total depth the driller reported. "Middle 80%" is the 10th to 90th percentile: one log in ten is shallower than the first number and one in ten deeper than the second. Water level is the median static water level (how far below the ground the water stood when the well was finished), from the logs that record one. Years: the span of the middle 90% of dated logs. Download the table (CSV).
| County | Logs | Median depth | Middle 80% | Water level | Years | Our town pages |
|---|---|---|---|---|---|---|
| Adams | 83 | 101 ft | 65 to 150 ft | 30 ft | 1991 to 2008 | |
| Allen | 5,808 | 70 ft | 40 to 157 ft | 28 ft | 1954 to 2014 | Delphos |
| Ashland | 1,470 | 125 ft | 75 to 202 ft | 40 ft | 1999 to 2018 | |
| Ashtabula | 1,866 | 60 ft | 43 to 108 ft | 10 ft | 1998 to 2018 | Jefferson |
| Athens | 82 | 118 ft | 57 to 249 ft | 40 ft | 1998 to 2018 | |
| Auglaize | 1,492 | 120 ft | 60 to 202 ft | 30 ft | 1998 to 2018 | Wapakoneta |
| Belmont | 379 | 120 ft | 77 to 207 ft | 45 ft | 1997 to 2018 | |
| Butler | 679 | 61 ft | 42 to 110 ft | 23 ft | 1989 to 2016 | |
| Carroll | 1,893 | 177 ft | 82 to 300 ft | 70 ft | 1998 to 2017 | Carrollton |
| Champaign | 1,487 | 111 ft | 51 to 220 ft | 45 ft | 1998 to 2018 | |
| Clark | 3,602 | 100 ft | 45 to 182 ft | 33 ft | 1990 to 2018 | New Carlisle |
| Clermont | 69 | 90 ft | 48 to 160 ft | 30 ft | 1998 to 2017 | |
| Clinton | 348 | 102 ft | 60 to 160 ft | 21 ft | 1993 to 2018 | |
| Columbiana | 3,214 | 147 ft | 80 to 298 ft | 52 ft | 1997 to 2018 | |
| Coshocton | 1,317 | 140 ft | 60 to 320 ft | 60 ft | 1999 to 2019 | Frazeysburg |
| Crawford | 962 | 63 ft | 36 to 140 ft | 21 ft | 1998 to 2018 | |
| Cuyahoga | 136 | 103 ft | 62 to 200 ft | 36 ft | 1997 to 2019 | |
| Darke | 2,045 | 121 ft | 55 to 198 ft | 26 ft | 1997 to 2018 | Greenville |
| Defiance | 1,419 | 90 ft | 58 to 143 ft | 30 ft | 1991 to 2017 | |
| Delaware | 1,130 | 80 ft | 40 to 142 ft | 20 ft | 1990 to 2018 | |
| Erie | 79 | 95 ft | 34 to 149 ft | 27 ft | 1994 to 2015 | |
| Fairfield | 5,005 | 115 ft | 48 to 240 ft | 40 ft | 1993 to 2018 | |
| Fayette | 701 | 90 ft | 48 to 160 ft | 20 ft | 1992 to 2017 | |
| Franklin | 4,306 | 115 ft | 53 to 182 ft | 45 ft | 1990 to 2018 | Columbus |
| Fulton | 1,101 | 98 ft | 19 to 185 ft | 30 ft | 1997 to 2018 | |
| Gallia | 53 | 123 ft | 63 to 276 ft | 40 ft | 1998 to 2017 | |
| Geauga | 8,121 | 120 ft | 66 to 231 ft | 40 ft | 1990 to 2017 | Middlefield |
| Greene | 1,848 | 100 ft | 52 to 177 ft | 31 ft | 1991 to 2018 | |
| Guernsey | 1,005 | 120 ft | 80 to 200 ft | 42 ft | 1998 to 2017 | |
| Hamilton | 118 | 85 ft | 36 to 122 ft | 45 ft | 1998 to 2017 | Cincinnati |
| Hancock | 1,119 | 75 ft | 39 to 128 ft | 20 ft | 1999 to 2018 | Findlay |
| Hardin | 812 | 98 ft | 59 to 170 ft | 26 ft | 1998 to 2018 | |
| Harrison | 720 | 140 ft | 71 to 250 ft | 52 ft | 1998 to 2018 | |
| Henry | 606 | 82 ft | 29 to 129 ft | 32 ft | 1998 to 2018 | |
| Highland | 519 | 106 ft | 75 to 157 ft | 20 ft | 1998 to 2016 | |
| Hocking | 1,802 | 280 ft | 109 to 420 ft | 160 ft | 1997 to 2018 | |
| Holmes | 1,906 | 170 ft | 80 to 320 ft | 90 ft | 1996 to 2019 | Millersburg |
| Huron | 457 | 67 ft | 39 to 120 ft | 20 ft | 1997 to 2017 | |
| Jackson | 64 | 180 ft | 100 to 300 ft | 60 ft | 1998 to 2016 | |
| Jefferson | 467 | 175 ft | 80 to 286 ft | 61 ft | 1998 to 2018 | |
| Knox | 4,119 | 152 ft | 76 to 245 ft | 60 ft | 1991 to 2018 | |
| Lake | 530 | 80 ft | 37 to 120 ft | 13 ft | 1991 to 2018 | Painesville |
| Lawrence | 50 | 108 ft | 68 to 375 ft | 48 ft | 1998 to 2017 | |
| Licking | 11,023 | 145 ft | 66 to 280 ft | 56 ft | 1959 to 2017 | Newark |
| Logan | 2,482 | 125 ft | 52 to 230 ft | 20 ft | 1998 to 2019 | |
| Lucas | 4,623 | 81 ft | 21 to 134 ft | 35 ft | 1955 to 2010 | |
| Madison | 1,666 | 107 ft | 56 to 179 ft | 31 ft | 1991 to 2018 | Plain City |
| Mahoning | 9,209 | 117 ft | 65 to 225 ft | 30 ft | 1950 to 2012 | |
| Marion | 1,296 | 85 ft | 50 to 121 ft | 25 ft | 1998 to 2018 | Marion |
| Medina | 2,850 | 112 ft | 70 to 195 ft | 40 ft | 1996 to 2018 | Medina |
| Meigs | 89 | 140 ft | 73 to 320 ft | 50 ft | 1997 to 2016 | |
| Mercer | 2,064 | 161 ft | 102 to 228 ft | 29 ft | 1998 to 2019 | Fort Recovery |
| Miami | 2,003 | 101 ft | 54 to 155 ft | 23 ft | 1998 to 2018 | Piqua |
| Monroe | 209 | 120 ft | 62 to 225 ft | 40 ft | 1998 to 2018 | |
| Montgomery | 1,423 | 100 ft | 50 to 162 ft | 25 ft | 1991 to 2017 | Dayton |
| Morgan | 175 | 100 ft | 44 to 200 ft | 37 ft | 1998 to 2018 | |
| Morrow | 1,201 | 109 ft | 40 to 182 ft | 38 ft | 1992 to 2018 | |
| Muskingum | 1,732 | 148 ft | 75 to 360 ft | 52 ft | 1998 to 2018 | |
| Noble | 104 | 117 ft | 66 to 201 ft | 39 ft | 1998 to 2018 | |
| Ottawa | 2,054 | 75 ft | 40 to 123 ft | 20 ft | 1955 to 2016 | |
| Paulding | 982 | 62 ft | 43 to 110 ft | 22 ft | 1994 to 2018 | Paulding |
| Perry | 2,602 | 120 ft | 59 to 360 ft | 43 ft | 1953 to 2015 | |
| Pickaway | 2,434 | 105 ft | 46 to 180 ft | 45 ft | 1990 to 2017 | |
| Pike | 97 | 112 ft | 65 to 200 ft | 30 ft | 1990 to 2016 | |
| Portage | 4,178 | 106 ft | 61 to 200 ft | 32 ft | 1997 to 2018 | Aurora |
| Preble | 1,409 | 96 ft | 46 to 155 ft | 26 ft | 1991 to 2017 | Lewisburg |
| Putnam | 1,121 | 88 ft | 45 to 275 ft | 27 ft | 1998 to 2018 | Ottawa |
| Richland | 3,143 | 158 ft | 68 to 278 ft | 62 ft | 1990 to 2018 | |
| Ross | 611 | 100 ft | 48 to 200 ft | 30 ft | 1990 to 2015 | |
| Sandusky | 3,670 | 95 ft | 62 to 143 ft | 28 ft | 1954 to 2014 | |
| Seneca | 1,787 | 95 ft | 60 to 140 ft | 26 ft | 1998 to 2018 | Tiffin |
| Shelby | 2,036 | 122 ft | 65 to 201 ft | 35 ft | 1997 to 2018 | |
| Stark | 8,298 | 140 ft | 74 to 300 ft | 45 ft | 1991 to 2018 | Alliance, Canton, Paris |
| Summit | 6,553 | 100 ft | 51 to 178 ft | 35 ft | 1990 to 2018 | Akron |
| Trumbull | 2,516 | 100 ft | 62 to 180 ft | 28 ft | 1993 to 2018 | |
| Tuscarawas | 3,141 | 200 ft | 70 to 400 ft | 75 ft | 1998 to 2018 | |
| Union | 2,814 | 105 ft | 60 to 182 ft | 29 ft | 1998 to 2018 | |
| Van Wert | 1,176 | 102 ft | 52 to 182 ft | 21 ft | 1994 to 2018 | Van Wert |
| Vinton | 565 | 340 ft | 160 to 440 ft | 160 ft | 1998 to 2018 | |
| Warren | 1,200 | 55 ft | 42 to 118 ft | 20 ft | 1992 to 2019 | |
| Washington | 115 | 100 ft | 50 to 232 ft | 40 ft | 2000 to 2019 | |
| Wayne | 4,553 | 120 ft | 70 to 200 ft | 50 ft | 1989 to 2018 | Dalton, Wooster |
| Williams | 1,678 | 105 ft | 65 to 172 ft | 28 ft | 1989 to 2018 | Bryan |
| Wood | 1,550 | 82 ft | 50 to 145 ft | 15 ft | 1998 to 2018 | Bowling Green |
| Wyandot | 928 | 89 ft | 60 to 132 ft | 28 ft | 2001 to 2019 | Forest |
Fewer than 30 logs with a depth, so no figures: Brown (23), Lorain (15), Scioto (17).
Method
- Source: the Ohio Department of Natural Resources, Water Wells layer (well log database, located wells). We downloaded it on October 10, 2026 from the state's own server.
- Rows counted: domestic water wells with a mapped location. Field filter as run: WELL_USE = DOMESTIC; depth = TOTAL_DEPTH; level = STATIC_WATER_LEVEL_FT.
- Each log is placed in the county the state file gives, matched to Census county names. 168,404 logs matched a Ohio county.
- A depth outside 1 to 5,000 feet is treated as a typing error and left out. A water level counts only when it is above zero and shallower than the well's depth. Medians and percentiles use the standard linear method.
- A county shows figures only with 30 or more logs that give a depth (water level: 30 or more levels). Nothing is estimated or filled in.
Limits
- Well logs cover drilled wells that a driller reported to the state. They are not a count of every well: older wells, hand-dug wells and wells from before reporting began are often missing.
- Depths and water levels are as each driller wrote them on the day the well was finished. Water levels move with season, drought and nearby pumping, so an old reading is not today's level.
- Dates vary by county. The years column shows when most of the logs were drilled; a county with mostly older logs describes older wells.
- A county figure says nothing certain about one lot. Depth can change a lot across a county, from hilltop to valley. A local driller's logs for nearby wells are the better guide for a single property.
- Ohio's public layer holds the wells with a mapped location, which ODNR describes as a subset of all its well records.
Data: Ohio Department of Natural Resources, Water Wells layer (well log database, located wells), read October 10, 2026. CSV of this table. Built by WellsNear from the state file; the code is the same for every state.
How to cite this: WellsNear, "How deep are wells in Ohio? Depth by county from state well logs," updated October 10, 2026, https://wellsnear.com/research/well-depth-by-county-ohio/