Isham Reavis (January 28, 1836 – May 8, 1914) was an American jurist who served as an associate justice of the Supreme Court of Arizona Territory.

[5] The new judge left Nebraska in August 1869, taking the newly completed Transcontinental Railroad to California before boarding a ship south to the mouth of the Colorado River.

[5][6] Reavis lived in La Paz till early 1871 when seat for the second judicial district was moved to Yuma.

Marshal, and his dissenting opinion in United States v. Certain Property and William Bichard and Company, which dealt with the Federal government's ability to regulate commerce outside Indian reservations.

[9] Reavis submitted his resignation on December 1, 1871, and remained on the bench till his replacement, DeForest Porter, was sworn in on April 12, 1872.