Buchanan Ingersoll & Rooney PC is an American law firm and lobbying group based in Pittsburgh, Pennsylvania.

[3] The firm was founded in 1850 by Congressman Moses Hampton and his son, John.

in 1983, and acquired two other firms during the 2000s: Burns, Doane, Swecker & Mathis in 2005, and Klett Rooney Lieber & Schorling PC in 2006, leaving the firm with its current name, Buchanan Ingersoll & Rooney.

[4] In December 2016, the firm announced a strategic affiliation with former Florida governor and presidential candidate Jeb Bush in order to boost the firm's practice in Florida, where it has six offices.

[5] Buchanan Ingersoll & Rooney has 17 law practices in areas including corporate, energy, Marcellus Shale, financial services, health care, intellectual property, labor and employment, immigration, bankruptcy and creditors' rights, tax, real estate, and litigation.