Idaho well depths by county

Every Idaho county, ranked by how many wells the state has on record. Each median is computed from that county's own records — retrieved 2026-09-29 — not from a statewide average. Depths under 18 feet are excluded as data-entry errors, following IDWR's own definition of a well.

County	Wells on record	Median depth	Median depth to water	Median yield
Canyon	20,201	140 ft	40 ft	50 gpm
Ada	19,863	119 ft	40 ft	41 gpm
Bonner	14,126	205 ft	45 ft	10 gpm
Kootenai	11,197	380 ft	105 ft	15 gpm
Twin Falls	9,442	180 ft	78 ft	25 gpm
Bingham	8,481	119 ft	50 ft	30 gpm
Jefferson	8,181	120 ft	43 ft	20 gpm
Valley	7,724	109 ft	28 ft	19.5 gpm
Bonneville	6,150	200 ft	120 ft	25 gpm
Cassia	5,801	234 ft	90 ft	25 gpm
Fremont	5,060	180 ft	72 ft	20 gpm
Idaho	4,825	275 ft	100 ft	15 gpm
Gem	4,689	85 ft	23 ft	30 gpm
Minidoka	4,681	168 ft	94 ft	25 gpm
Blaine	4,522	103 ft	29 ft	40 gpm
Bannock	4,477	165 ft	60 ft	25 gpm
Jerome	4,404	270 ft	198 ft	20 gpm
Elmore	4,247	351 ft	145 ft	25 gpm
Payette	4,046	83 ft	24 ft	30 gpm
Madison	4,016	98 ft	24 ft	25 gpm
Teton	3,868	185 ft	75 ft	20 gpm
Gooding	3,838	192 ft	128 ft	30 gpm
Latah	3,783	298 ft	70 ft	10 gpm
Lemhi	3,384	66 ft	20 ft	18 gpm
Boise	3,241	226 ft	54 ft	15 gpm
Owyhee	3,147	215 ft	31 ft	20 gpm
Washington	2,854	93.5 ft	17 ft	30 gpm
Custer	2,707	100 ft	30 ft	30 gpm
Benewah	2,591	301.5 ft	72 ft	15 gpm
Caribou	2,414	145 ft	50 ft	30 gpm
Nez Perce	2,034	300 ft	112 ft	20 gpm
Boundary	2,021	240.5 ft	45 ft	12 gpm
Adams	1,930	201 ft	60 ft	20 gpm
Clearwater	1,907	305 ft	120 ft	10 gpm
Oneida	1,693	213 ft	65 ft	30 gpm
Power	1,522	230 ft	80 ft	35 gpm
Franklin	1,501	201 ft	50 ft	25 gpm
Butte	1,500	140 ft	59 ft	40 gpm
Shoshone	1,482	77 ft	18 ft	12 gpm
Lincoln	1,428	345 ft	243.5 ft	20 gpm
Bear Lake	1,202	157 ft	27.5 ft	25 gpm
Camas	976	160 ft	28 ft	20 gpm
Lewis	608	305 ft	118.5 ft	15 gpm
Clark	479	256 ft	130 ft	30 gpm

See what drilling actually costs in each county →

County medians are orientation, not evidence

A single county can hold both 40 ft and 600 ft wells. The number that matters is what the wells nearest your parcel actually did.

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