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Royalty Clerk

Texas county · RRC district 01

McMullen County

McMullen County reported 24 million barrels of oil and 200 million mcf of gas in the 12 months through Jul 2026. That ranks 21st of 224 Texas counties by oil.

County dossier · #21 of 224 for oil

24,442,337bbl oil, last 12 months−22% vs prior year
Producing leases
1,656of 2,051 on record
Operators
60
Fields
61
Top operator
BPX Operating Company

Own minerals in McMullen County?

Upload a royalty check stub or a phone photo. We compare each month with the Jul 2026 state numbers for the leases below.

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Where it sits

This county

McMullen CountyMcMullenLA SalleAtascosaKarnesFrioLive OakMcMullen County
McMullen County · RRC district 01
Gas, last 12 months
199,940,643 mcf
Share of Texas oil
1.2%
Leases on record
2,051
Data through
Jul 2026

Production

Five years of output in McMullen County

Monthly totals for every lease the Railroad Commission places in this county. Oil is in barrels (bbl), gas in thousand cubic feet (mcf).

Oil output in McMullen County fell 22% over the last 12 months

24M bbl in the 12 months through Jul 2026, against 31M bbl in the 12 months before. Peak month: Oct 2024, 3M bbl.

Oil output in McMullen County fell 22% over the last 12 months24M bbl in the 12 months through Jul 2026, against 31M bbl in the 12 months before. Peak month: Oct 2024, 3M bbl.Oil, bbl per month01M2M3M4MPeak 3M (Oct 24)1.6M20222023202420252026
Oil output in McMullen County fell 22% over the last 12 months24M bbl in the 12 months through Jul 2026, against 31M bbl in the 12 months before. Peak month: Oct 2024, 3M bbl.Oil, bbl per month01M2M3M4MPeak 3M (Oct 24)1.6M'22'23'24'25'26

Gas output in McMullen County held steady over the last 12 months

200M mcf in the 12 months through Jul 2026, against 203M mcf in the 12 months before. Peak month: Jul 2025, 20M mcf.

Gas output in McMullen County held steady over the last 12 months200M mcf in the 12 months through Jul 2026, against 203M mcf in the 12 months before. Peak month: Jul 2025, 20M mcf.Gas, mcf per month05M10M15M20MPeak 20M (Jul 25)16M20222023202420252026
Gas output in McMullen County held steady over the last 12 months200M mcf in the 12 months through Jul 2026, against 203M mcf in the 12 months before. Peak month: Jul 2025, 20M mcf.Gas, mcf per month05M10M15M20MPeak 20M (Jul 25)16M'22'23'24'25'26

SourceTexas Railroad Commission, Production Data Query, county totals of every lease. Reported through Jul 2026, file dated Sep 18, 2026. The newest month is often revised as operators file late.

Leases

The biggest leases in McMullen County

Ranked by what they produced in the last 12 months. Sort, filter by operator or field, and open any lease for its month-by-month ledger.

Showing 25 of 150 (the 150 largest of 1,656 producing leases).

Search all 2,051 leases →

SourceTexas Railroad Commission, Production Data Query. Ranked by an approximate value of last-12-month output, so oil and gas wells sort together.

In McMullen County

Who runs the leases, and what they produce

Your royalty check comes from the operator. These are the ones with the most output here.

Operators in McMullen County, by oil

EOG Resources leads

  1. EOG Resources, Inc.150 producing leases here5.8Mbbl
  2. BPX Operating Company279 producing leases here3.7Mbbl
  3. Ineos USA Oil & Gas LLC113 producing leases here3.6Mbbl
  4. Gulftex Energy, LLC45 producing leases here2.9Mbbl
  5. Murphy Expl. & Prod. Co. - USA36 producing leases here1.6Mbbl
  6. Verdun Oil & Gas LLC48 producing leases here1.2Mbbl
  7. Repsol Oil & Gas USA, LLC54 producing leases here991kbbl
  8. Crescent Energy Operating, LLC107 producing leases here862kbbl

Fields in McMullen County, by oil

Eagleville (Eagle Ford-1) leads

  1. Eagleville (Eagle Ford-1)730 producing leases here · District 01 · Field 2713570022Mbbl
  2. Hawkville (Eagleford Shale)284 producing leases here · District 01 · Field 397445002.2Mbbl
  3. A.w.p. (Olmos)531 producing leases here · District 01 · Field 00256500232kbbl
  4. San Miguel Creek (Wilcox Cons.)12 producing leases here · District 01 · Field 8030092537.9kbbl
  5. Dilworth (Carrizo)1 producing lease here · District 01 · Field 2480626727.5kbbl
  6. Baker (2500)2 producing leases here · District 01 · Field 0512275013.7kbbl
  7. Indio Tanks (Pearsall)2 producing leases here · District 01 · Field 445105005,961bbl
  8. Campana, South (Wilcox 9500)1 producing lease here · District 01 · Field 151466002,198bbl

More operators here

OperatorCrescent Energy Operating, LLC107OperatorRosewood Resources, Inc.25OperatorBurlington Resources O & G Co LP3OperatorJavelin Energy Partners Mgmt LLC26
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Recent drilling permits in McMullen County

For owners

Minerals in McMullen County, in plain terms

Rank by oil
21 of 224
Share of Texas oil
1.2%
Producing leases
1,656
Operators
60

If you inherited mineral rights in McMullen County, the money comes from an operator: the company that drills and runs the wells. Here, the largest is BPX Operating Company, among 60 operators with producing leases.

Each lease has a name, a Railroad Commission district and a lease number. Your check stub prints them, or a version of them. Search the name on your stub, open the lease, and compare the “oil sold” and “gas sold” volumes for the month with the barrels and mcf on your stub.

We hold 2,051 leases in McMullen County, of which 1,656 reported production recently. The state publishes county totals two to three months late, so Jul 2026 is the newest month.