Isaac Pigeon Walker (November 2, 1815 – March 29, 1872) was an American politician who served as a U.S.

[1] Walker was born in Virginia and moved with his family to Illinois in 1825.

He moved to Wisconsin in 1841 and practiced law in the Milwaukee area.

In 1850, he tried to introduce a one-sentence amendment to Henry Clay's omnibus bill.

The amendment proposed to abolish peon slavery, a form of unfree labor among Native American workers in California and New Mexico.