Warren County was formed on March 12, 1800 out of Allegheny County, with the original township of Brokenstraw being formed in that October from everything in the county west of the Allegheny River and Conewango Creek; Conewango Township was formed in March 1808 and consisted of the unincorporated eastern half of Warren County.

[2] The township grew slowly at first, receiving a brief boom during the 1890s and 1900s as the lumber industry in the area surged.

Kinzua Township hovered at around 500 residents from 1910 through the rest of its existence.

[5] Kinzua's Keystone Marker remains intact and has been relocated into the hands of a private collector.

Kinzua Township was located on the eastern border of Warren County, and was bounded by the Allegheny River on the northwest, Kinzua Creek (and on the other side of that, the Warren County portion of Corydon Township) to the northeast, McKean County on the east, Sheffield Township to the south, and Mead Township on the west.