James Knox Polk Hall was a Democratic member of the U.S. House of Representatives from Pennsylvania.
James K. P. Hall was born in Milesburg, Pennsylvania. He was educated in Pittsburgh, Pennsylvania. He studied law and was admitted to the bar in 1866. He was elected district attorney of Elk County, Pennsylvania in 1867, and reelected in 1870 and 1873. He retired from the practice of law in 1883 to engage in the coal, lumber, and railroad businesses as well as banking.
Hall was elected as a Democrat to the Fifty-sixth and Fifty-seventh Congresses and served until his resignation. He was a member of the Pennsylvania State Senate from 1902 to 1914. He died in Tampa, Florida, in 1915. Interment in Pine Grove Cemetery, Ridgway, Pennsylvania.