Wilcox Formation

Operator-reported tops from 31,351 wells across 68 counties, median tops running 100–11,975 ft by county.

Top depth: 1,800 ft 6,727 ft

10,364 wells shown (sampled from 31,351)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Webb	5,420	4,635 ft	1,800–8,858	↓
Karnes	4,346	5,158 ft	3,900–7,006	↓
La Salle	2,602	3,261 ft	2,274–4,808	↓
De Witt	2,354	5,807 ft	4,900–8,099	↓
Mcmullen	2,277	4,940 ft	3,077–7,210	↓
Zapata	2,117	6,750 ft	4,340–10,850	↓
Gonzales	1,398	3,653 ft	2,332–4,680	↓
Atascosa	1,269	3,685 ft	600–5,376	↓
Live Oak	1,154	5,499 ft	4,574–8,732	↓
Lavaca	890	7,360 ft	4,102–11,626	↓
Burleson	553	4,000 ft	2,420–5,250	↓
Colorado	431	8,386 ft	6,700–9,840	↓
Duval	384	8,238 ft	6,950–12,239	↓
Fayette	364	4,304 ft	2,299–6,210	↓
Bexar	355	500 ft	200–550	↓
Wilson	337	1,964 ft	578–3,986	↓
Brazos	311	3,610 ft	1,896–4,708	↓
Goliad	306	9,156 ft	7,539–11,897	↓
Washington	285	3,675 ft	1,850–5,636	↓
Polk	282	6,999 ft	5,990–8,280	↓
Milam	264	700 ft	1–2,150	↓
Tyler	253	7,858 ft	5,828–9,265	↓
Lee	221	3,672 ft	1,300–4,808	↓
Bee	206	6,980 ft	5,505–8,996	↓
Montgomery	189	10,370 ft	8,500–12,112	↓
Newton	182	9,479 ft	4,282–11,000	↓
Wharton	182	11,150 ft	9,786–13,400	↓
Madison	168	3,725 ft	1,685–5,140	↓
Jasper	164	8,515 ft	4,394–10,980	↓
Houston	146	1,606 ft	1,518–2,717	↓
San Jacinto	143	7,610 ft	7,230–10,210	↓
Frio	130	3,010 ft	1,252–3,874	↓
Dimmit	128	2,332 ft	1,250–2,832	↓
Austin	126	8,355 ft	6,379–10,400	↓
Anderson	123	755 ft	691–2,119	↓
Victoria	104	8,547 ft	8,100–10,453	↓
Hardin	103	9,696 ft	8,862–10,871	↓
Fort Bend	100	11,975 ft	10,133–13,529	↓
Caldwell	82	100 ft	1–640	↓
Harris	80	9,943 ft	9,520–12,128	↓
Waller	74	10,048 ft	6,950–10,393	↓
Starr	74	6,722 ft	5,535–11,119	↓
Van Zandt	71	300 ft	1–400	↓
Grimes	64	2,907 ft	1,897–7,600	↓
Bastrop	59	2,114 ft	1–4,060	↓
Jim Hogg	56	10,100 ft	9,115–14,635	↓
Guadalupe	53	325 ft	1–1,015	↓
Zavala	48	270 ft	1–2,044	↓
Walker	41	3,482 ft	2,362–6,048	↓
Leon	35	2,520 ft	2,248–4,454	↓
Liberty	33	9,050 ft	8,824–11,600	↓
Trinity	32	2,929 ft	1,914–3,146	↓
Jackson	29	10,040 ft	9,059–10,608	↓
Medina	21	200 ft	25–225	↓
Rusk	19	1,160 ft	932–1,330	↓
Sabine	17	2,940 ft	1,450–3,390	↓
Wood	14	1,037 ft	706–1,441	↓
Maverick	12	300 ft	153–956	↓
Cherokee	10	1,888 ft	1,441–2,045	↓
Angelina	9	3,748 ft	2,830–4,219	↓
Nacogdoches	8	2,362 ft	319–3,358	↓
Shelby	8	500 ft	1–980	↓
Harrison	8	130 ft	1–1,034	↓
Gregg	6	962 ft	450–1,118	↓
San Augustine	6	3,100 ft	2,500–4,750	↓
Chambers	5	3,862 ft	3,787–3,880	↓
Cottle	5	350 ft	350–350	↓
Robertson	5	820 ft	333–1,934	↓

Counties with fewer than 5 wells omitted. Depths are measured depth as filed; typical range is the 10th–90th percentile of reported tops — raw filings contain occasional typo depths, so extremes are not shown.