Ioakeim Martianos (Greek: Ιωακείμ Μαρτινιανός; 1875–1955) was a Greek Orthodox bishop and author.

Martianos was an ethnic Aromanian.^[1][2] He was born in Moscopole, modern southern Albania, where he acquired ground level studies. He attended the Phanar Greek Orthodox College, followed by the Halki seminary in Constantinople (modern Istanbul).^[3] Martianos was positioned at the following bishoprics:^[4]

• Berat: 1911–1924
• Paramythia: 1924–1925
• Nea Pelagonia (Ptolemaida): 1925–1942
• Kilkis: 1942–1945.
• Xanthi: 1945–1953.

Martianos also composed a voluminous treatise about his native town Moscopole.^[5] This work has been described by various scholars as one of the best analysis of the town's mid-18th century destruction,^[6] although it concentrates on the Greek features of the town.^[7]