Organization and Description of Business	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business STAG Industrial, Inc. (the “Company”) is an industrial real estate operating company focused on the acquisition, development, and operation of industrial properties throughout the United States. The Company was formed as a Maryland corporation and has elected to be treated and intends to continue to qualify as a real estate investment trust (“REIT”) under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (“the Code”). The Company is structured as an umbrella partnership REIT, commonly called an UPREIT, and owns all of its properties and conducts substantially all of its business through its operating partnership, STAG Industrial Operating Partnership, L.P., a Delaware limited partnership (the “Operating Partnership”). As of December 31, 2025 and 2024, the Company owned 98.1% and 98.0%, respectively, of the common units of the limited partnership interests in the Operating Partnership. The Company, through its wholly owned subsidiary, is the sole general partner of the Operating Partnership. As used herein, the “Company” refers to STAG Industrial, Inc. and its consolidated subsidiaries, including the Operating Partnership, except where context otherwise requires. As of December 31, 2025, the Company owned 601 industrial buildings in 41 states with approximately 120.0 million rentable square feet (square feet unaudited herein and throughout the Notes).

Organization and Description of Business

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

STAG Industrial, Inc. (the “Company”) is an industrial real estate operating company focused on the acquisition, development, and operation of industrial properties throughout the United States. The Company was formed as a Maryland corporation and has elected to be treated and intends to continue to qualify as a real estate investment trust (“REIT”) under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (“the Code”). The Company is structured as an umbrella partnership REIT, commonly called an UPREIT, and owns all of its properties and conducts substantially all of its business through its operating partnership, STAG Industrial Operating Partnership, L.P., a Delaware limited partnership (the “Operating Partnership”). As of December 31, 2025 and 2024, the Company owned 98.1% and 98.0%, respectively, of the common units of the limited partnership interests in the Operating Partnership. The Company, through its wholly owned subsidiary, is the sole general partner of the Operating Partnership. As used herein, the “Company” refers to STAG Industrial, Inc. and its consolidated subsidiaries, including the Operating Partnership, except where context otherwise requires.

As of December 31, 2025, the Company owned 601 industrial buildings in 41 states with approximately 120.0 million rentable square feet (square feet unaudited herein and throughout the Notes).