Edwin Shannon Jennison (1832-1895), better known as E. S. Jennison, was an American architect from Chicago, Illinois. Jennison was born in 1832 in Walpole, New Hampshire. He later relocated to Michigan, where he attended the University of Michigan, class of 1868. He immediately opened an architect's office in Chicago. He remained active in his profession until his death in 1895. He is most notable for his design of New Mexico's first Capitol Building.