You can run a free mineral rights search in Texas using three public databases: the General Land Office Land Grant Database for original state patents, the Railroad Commission’s Public GIS Viewer and Production Data Query for wells and production, and your county clerk’s online grantor/grantee index for every deed and mineral reservation recorded since the patent. Used together, these tools can tell you who owns the minerals under a specific tract, whether those minerals are currently leased, and whether any well is producing on the property.
Texas treats the surface and the minerals as two separate estates. A deed can sell the land and keep the oil, gas, and other minerals, or the reverse, and once that split happens it is permanent unless the mineral estate is later conveyed back.1Railroad Commission of Texas. Oil and Gas Exploration and Surface Ownership Owning the surface does not mean you own what’s underneath. A search is how you find out.
What to Gather Before You Search
Every mineral search begins with the legal description of the tract. You need the Abstract number, the unique identifier the General Land Office assigned to each surveyed parcel when it was patented. You also need the Survey name and, where applicable, the Block and Section numbers. These details appear on your county property tax statement or on the most recent warranty deed for the surface.
Names matter as much as numbers. Write down the current owner, any prior owners you know of, and common spelling variants, because a name recorded as “Wm.” in 1947 will not match a search for “William.” Note the county where the land sits, because that determines which clerk’s office holds the records. If you have a prior deed or title policy, pull out the volume and page references to earlier recordings. Those references are the trail markers you follow through the chain of title.
One more preliminary step: check the county appraisal district. When minerals have been severed from the surface, the appraisal district typically creates a separate mineral account with its own account number that will not appear on the surface property record. Searching the appraisal district’s online property search by owner name can reveal these accounts and show who the district currently taxes for the minerals.
The Free State Tools
General Land Office Land Grant Database
The Texas General Land Office maintains scanned images of every original patent going back to the Republic of Texas. You can search by county, Abstract number, original grantee, patentee name, patent date, or survey and block number.2Texas General Land Office. Land Grant Database The GLO manages the state’s public lands under Texas Natural Resources Code § 31.051.3State of Texas. Texas Natural Resources Code Section 31.051 – General Powers and Duties of Commissioner
The land grant is the starting point of ownership. It tells you who received the patent from the state, which is the origin of every subsequent deed in the chain. If minerals were never severed, the ownership from patent to present should be unbroken. If they were severed at some point, the patent still tells you where to start tracing forward.
Railroad Commission Public GIS Viewer
The Railroad Commission’s Public GIS Viewer maps oil and gas wells, pipelines, and original Texas land survey boundaries statewide.4Railroad Commission of Texas. Public GIS Viewer Search by county, then filter by Abstract number, survey name, block, or section to zoom to a specific parcel.5Railroad Commission of Texas. RRC Public GIS Viewer The Commission has jurisdiction over all oil and gas wells in Texas under Natural Resources Code § 81.051, which is why it publishes this data.6State of Texas. Texas Natural Resources Code Section 81.051 – Jurisdiction of Commission
The viewer is especially useful for spotting wells you didn’t know were there. A modern horizontal well can originate on a neighboring tract and run laterally under your property. The map shows the horizontal path, and clicking a well symbol pulls up the API number, operator name, and lease information.
Railroad Commission Production Data Query
The Commission’s Production Data Query gives you monthly oil and gas volumes for each lease. You can run a general query by geography and time period, or search a specific lease number. The database currently holds production records from January 1993 through early 2026.7Railroad Commission of Texas. Production Data Query Consistent monthly output tells you the lease is almost certainly still in effect. Zero production over an extended period suggests the lease may have expired.
County Clerk Grantor/Grantee Index
The county clerk is the official recorder of deeds, mineral reservations, and leases. Texas Local Government Code § 191.001 requires the clerk to record each filed instrument without delay and keep it properly indexed.8State of Texas. Texas Local Government Code Section 191.001 – County Recorder; Seal; General Duties
Most Texas counties offer free online access to their Official Public Records through a grantor/grantee index. Type in a name and a date range, and the system returns every recorded document involving that person. Each deed references the volume and page of the prior recording, giving you a link to click through to the next document in the chain. Viewing scanned document images online is free in most counties; certified copies typically carry per-page fees. Coverage varies widely. Larger counties are fully digitized for decades back. Rural counties may only have recent documents online, forcing a courthouse visit for older records.
Running the Chain of Title Backward
Running a chain of title means tracing ownership from the current deed all the way back to the original state patent, watching for any document that severed the minerals from the surface. Start with the most recent deed and read its legal description carefully. A mineral reservation clause will state that the seller is keeping some fraction of the mineral rights. The language is usually blunt: “Grantor reserves all of the oil, gas, sulphur, and other minerals in and under said land.” That one sentence creates a permanent split.
Each deed contains a reference to the previous recording, usually a volume and page number. Follow those references backward through the clerk’s index, reading each document for reservation language, exceptions, or references to prior mineral conveyances. The goal is to reach the original GLO patent with no gaps in the ownership history. Any gap is a title defect that could cloud the claim.
Two kinds of documents deserve special attention. Quitclaim deeds transfer whatever interest the grantor holds without guaranteeing they hold any. Heirship affidavits appear when a mineral owner dies without a will and heirs file an affidavit establishing their inheritance; fractional interests can splinter quickly across multiple family members over several generations. Each of these must be properly acknowledged or signed before witnesses to qualify for recording under Texas Property Code § 12.001.9State of Texas. Texas Property Code PROP Section 12.001
Checking Whether the Minerals Are Leased or Producing
Once you know who owns the minerals, the next question is whether they’re already tied up. A producing well keeps a lease alive indefinitely through what’s called “held by production.” As long as the well produces, the mineral owner cannot sign a new lease with anyone else.
Use the GIS Viewer and the Production Data Query together. On the viewer, click a well symbol to see its API number, operator name, and lease name. Cross-reference the lease in the Production Data Query to pull monthly volumes.7Railroad Commission of Texas. Production Data Query Steady monthly numbers mean the lease is alive. A long run of zeros suggests it may have terminated, which opens the door for a new lease.
Searching for Unclaimed Royalties in Your Name
When an operator cannot locate a mineral owner to deliver royalty payments, the funds eventually get turned over to the Texas Comptroller’s unclaimed property program. The Comptroller’s ClaimItTexas site lets you search by name for any unclaimed funds, including mineral royalties held in suspense.10Texas Comptroller of Public Accounts. Texas Unclaimed Property Search every name variation your family has used, including maiden names and initials. Royalties from decades-old interests turn up here often, especially when an original owner died and heirs never updated the operator’s records.
Be cautious about anyone who contacts you offering to recover unclaimed royalties for a fee. Texas caps finder’s fees for these services, and some operators disguise what is actually a term royalty deed as a lease or a service agreement. If a document would transfer any part of your mineral interest rather than authorize someone to collect a one-time payment, stop and consult an attorney.
Where a Free Search Stops Working
A self-directed search handles straightforward situations well: a single tract with a short ownership history, clear deed language, and no active disputes. It struggles once you hit fractionated heirship interests, missing recordings, conflicting deed descriptions, or long stretches of unrecorded transfers. If a property has been in one family for a century, minerals may have fractionated through probate several times, leaving dozens of owners each holding tiny decimal interests. The free tools can identify the problem. Resolving it usually requires a title opinion from a licensed attorney.
Independent field landmen do this work for a living. They research courthouse records to determine ownership, negotiate leases, and obtain curative documents that fix title defects. In-house company landmen handle contract drafting, regulatory compliance, and drilling preparation. Hiring a landman or a mineral rights attorney is worth serious consideration before you sign a lease or sell an interest, because the cost of a professional search is small compared to the value of the minerals at stake. A free search using the tools above is still the right first step. It tells you what you’re dealing with and lets you judge the quality of any professional work you commission afterward.