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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Feb. 23, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Amendment Flag false    
Entity Central Index Key 0001995807    
Entity Registrant Name LandBridge Company LLC    
Entity File Number 001-42150    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 93-3636146    
Entity Address, Address Line One 5555 San Felipe Street    
Entity Address, Address Line Two Suite 1200    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77056    
City Area Code 713    
Local Phone Number 230-8864    
Title of 12(b) Security Class A shares, representing limited liability company interests    
Trading Symbol LB    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction Flag true    
Document Financial Statement Restatement Recovery Analysis Flag true    
Entity Shell Company false    
Entity Public Float     $ 1.7
Documents Incorporated by Reference

Portions of the Registrant’s definitive proxy statement for the 2026 Annual Meeting of Shareholders (the “2026 Proxy Statement”), which will be filed with the U.S. Securities and Exchange Commission (the “SEC”) within 120 days after December 31, 2025, are incorporated by reference into Part III of this Annual Report on Form 10-K.

    
Auditor Name Deloitte & Touche LLP    
Auditor Firm ID 34    
Auditor Location Houston, Texas    
Auditor Opinion

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of LandBridge Company LLC and subsidiaries (the "Company") as of December 31, 2025 and 2024, the related consolidated statements of operations, shareholders’ and member’s equity, and cash flows, for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2026, expressed an unqualified opinion on the Company's internal control over financial reporting.

    
Class A Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   27,838,199  
Class B Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   49,250,916