Jacob K. Shafer (December 26, 1823 – November 22, 1876) was a Delegate from Idaho Territory.

And from the law school of L.P. Thompson in Staunton, Virginia, in 1846.

He served as mayor of Stockton in 1852 and as a judge of the San Joaquin County Court from 1853 to 1862.

He resumed the practice of law, then later he moved to Eureka, Nevada, where he died November 22, 1876.

This article incorporates public domain material from the Biographical Directory of the United States Congress