The Tree of Liberty, published weekly from 1800 to about 1810, was the second newspaper in Pittsburgh, Pennsylvania, United States.

[2] John D. Israel established the paper and issued it from a building owned by Hugh Henry Brackenridge.

[3] Israel's columns promoted the Democratic-Republican politics of Thomas Jefferson while denouncing Federalists and their local organ, the Pittsburgh Gazette.

[4] With the issue of 24 December 1805, Walter Forward assumed control of the paper with the participation of his friends Henry Baldwin and Tarleton Bates.

[8] The Tree changed hands from Forward to William Foster in April 1807,[9] after which it remained in publication for approximately three years.