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How Deep Are Wells in Ohio? Real Depth Data by County

"How deep will my well need to be?" is one of the hardest well-drilling questions to answer in the abstract, because it depends entirely on local geology. Ohio publishes its driller's completion reports as open data, so instead of a national average, here is what 44,406 actual residential wells drilled since 2011 report for depth, broken down by county.

Source and method: Ohio Department of Natural Resources Division of Geological Survey water-well database (Water Wells of Ohio), extracted 2026-07-14. Figures include only wells recorded as residential (domestic) use, completed 2011 or later, with a reported depth between 15 and 2,000 ft (to exclude likely data-entry errors). A county is shown only if it has at least 5 qualifying reports. The depth shown is the reported total depth of the well; ODNR notes these well records are not verified by state staff and may contain errors. These are figures self-reported by licensed drillers to the state; neither the Ohio Department of Natural Resources nor this site independently verifies them. Treat this as a planning reference, not a guarantee for any specific property, your own site could sit well outside your county's typical range.

Median well depth by county

"Typical range" is the 10th-to-90th-percentile band, i.e. where 80% of reported wells in that county fell. Counties with fewer than 5 qualifying reports since 2011 are omitted rather than shown with a misleading precise figure.

County Median depth Typical range (10th-90th pct) Reports used
Adams 120 ft 80-141 ft 5
Allen 72 ft 40-149 ft 612
Ashland 120 ft 70-200 ft 576
Ashtabula 59 ft 40-113 ft 531
Athens 115 ft 55-220 ft 32
Auglaize 123 ft 60-215 ft 563
Belmont 130 ft 85-250 ft 188
Butler 59 ft 37-80 ft 107
Carroll 172 ft 71-300 ft 525
Champaign 110 ft 50-217 ft 505
Clark 100 ft 44-198 ft 853
Clermont 78 ft 48-196 ft 18
Clinton 100 ft 62-160 ft 99
Columbiana 142 ft 80-300 ft 909
Coshocton 140 ft 65-360 ft 619
Crawford 68 ft 38-140 ft 276
Cuyahoga 110 ft 60-200 ft 54
Darke 121 ft 54-201 ft 707
Defiance 92 ft 59-145 ft 398
Delaware 80 ft 41-146 ft 247
Erie 100 ft 60-184 ft 18
Fairfield 120 ft 51-240 ft 1,609
Fayette 95 ft 46-180 ft 189
Franklin 108 ft 58-179 ft 1,104
Fulton 106 ft 18-185 ft 372
Gallia 120 ft 70-300 ft 20
Geauga 120 ft 65-205 ft 1,686
Greene 103 ft 59-180 ft 558
Guernsey 138 ft 90-200 ft 299
Hamilton 72 ft 30-120 ft 30
Hancock 78 ft 39-128 ft 463
Hardin 90 ft 55-155 ft 339
Harrison 157 ft 80-240 ft 283
Henry 84 ft 56-140 ft 246
Highland 114 ft 80-150 ft 131
Hocking 305 ft 130-440 ft 689
Holmes 180 ft 78-320 ft 1,125
Huron 74 ft 40-120 ft 98
Jackson 220 ft 120-380 ft 19
Jefferson 175 ft 100-260 ft 183
Knox 160 ft 80-260 ft 1,109
Lake 80 ft 40-120 ft 176
Lawrence 120 ft 70-250 ft 23
Licking 160 ft 80-300 ft 2,238
Logan 125 ft 52-233 ft 1,081
Lucas 82 ft 20-154 ft 280
Madison 102 ft 58-166 ft 499
Mahoning 150 ft 93-259 ft 653
Marion 92 ft 60-130 ft 451
Medina 120 ft 80-200 ft 981
Meigs 175 ft 76-340 ft 22
Mercer 163 ft 103-241 ft 827
Miami 101 ft 53-154 ft 673
Monroe 125 ft 61-258 ft 96
Montgomery 100 ft 45-163 ft 324
Morgan 100 ft 44-203 ft 74
Morrow 120 ft 48-180 ft 367
Muskingum 160 ft 80-400 ft 442
Noble 130 ft 95-260 ft 43
Ottawa 99 ft 62-122 ft 236
Paulding 61 ft 42-107 ft 296
Perry 166 ft 67-400 ft 274
Pickaway 107 ft 52-180 ft 497
Pike 110 ft 65-142 ft 17
Portage 120 ft 67-220 ft 1,441
Preble 93 ft 46-155 ft 316
Putnam 96 ft 49-293 ft 532
Richland 160 ft 69-280 ft 938
Ross 104 ft 42-230 ft 90
Sandusky 100 ft 61-152 ft 298
Seneca 95 ft 61-145 ft 651
Shelby 123 ft 67-215 ft 604
Stark 140 ft 71-299 ft 2,273
Summit 100 ft 50-186 ft 1,754
Trumbull 110 ft 60-190 ft 731
Tuscarawas 200 ft 65-400 ft 1,141
Union 102 ft 61-180 ft 985
Van Wert 120 ft 60-182 ft 386
Vinton 360 ft 200-440 ft 216
Warren 47 ft 34-95 ft 247
Washington 100 ft 45-220 ft 90
Wayne 122 ft 75-215 ft 1,380
Williams 109 ft 70-176 ft 453
Wood 82 ft 53-140 ft 429
Wyandot 87 ft 59-134 ft 487

How to use this table

Find your county, then use the median and typical-range figures as a starting point when budgeting with the well drilling cost estimator or reading the cost guide. A driller working in your county day-to-day will still know more about your specific property than a county-wide figure can, ask them how your site compares to the county's typical range, and why, before you commit to a per-foot quote with no depth ceiling.

We build these tables state by state from each state's public completion-report data. See also our Texas well depth by county page.

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