Germanos Karavangelis (Greek: Γερμανός Καραβαγγέλης, also transliterated as Yermanos and Karavaggelis or Karavagelis, 1866–1935) was known for his service as Metropolitan Bishop of Kastoria and later Amaseia, Pontus. He was a member of the Hellenic Macedonian Committee and functioned as one of the major coordinators of the Greek Struggle for Macedonia.

Germanos Karavangelis was born Stylianos in 1866, in the village of Stipsi at Lesbos island, then still under Ottoman rule. His father was a Psariot by the name of Chrysostomos and his mother was Maria. He had seven other siblings which included six sisters and one brother. When he was two years old, his family moved to Adramyttio, Asia-Minor (now Edremit, Turkey) where his father opened a shop. There, he attended school and was awarded a scholarship to study at the Theological School of Halki. He graduated in 1888, when he was ordained a Deacon and received the name Germanos. He then went on to study philosophy at the University of Leipzig and University of Bonn.

Germanos received a doctorate and went to Constantinople (now Istanbul, Turkey) where in 1891 he was assigned as a professor of Ecclesiastical History and Theology at the Theological School of Halki, where he had previously attended. As a professor, he wrote an encyclopedia of theology as well as scientific works and ecclesiastical discourses. In 1886, he was ordained a bishop with the title "Bishop of Charioupolis." At this new position, he fought for more Greek education and to curb anti-Greek sentiment. He assisted in sending Greek students abroad for higher education and was successful in recruiting 130 to the newly built Zografeion Lyceum. He also founded a girls' school by the name of "Karavangeli Girls' School." Karavangelis would also organize Sunday school classes and train new Clergymen.

From 1896 to 1900 he would serve as the Bishop of Pera (now Beyoğlu, Turkey).

He was a Metropolitan Bishop of Kastoria, in communion with the Ecumenical Patriarchate of Constantinople, from 1900 until 1907, appointed in the name of the Greek state by the ambassador of Greece Nikolaos Mavrokordatos and was one of the main coordinators of the Greek Struggle for Macedonia that had an aim of defending the Greek and Greek Orthodox clerical interests against the Turks and the Bulgarians in then Ottoman Turkish-ruled Macedonia.

During the Macedonian struggle, Karavangelis directed the Greek response to supporters of the Bulgarian cause, the Internal Macedonian Revolutionary Organization (VMRO) and the Exarchate. At the time Karavangelis would travel in rural areas, and portrayed a fierce image of himself dressed with a dark raincoat, a bandolier on one side of his shoulder and a gun on the other with a scarf tied around his clerical hat. He would assist in raising the morale of those aligned with the Patriarchate and in organizing armed bands to fight the Komitadjis. Karavangelis viewed Bulgarian influence within the area as a threat to Greek interests. He advocated for close relations and interaction among Turks and Greeks in the region, but only in the context of when it was needed. Karavangelis viewed the rivalry between the Patriarchate and Exarchate as lacking religious dimensions and that the main concern preoccupying Balkan states was the post-Ottoman future of in the region after the empire was removed from Macedonia. Greece at the time sent more funds, men and arms to individuals such as Karavangelis in Macedonia. He was successful in returning many villages to the Patriarchate.

Karavangelis organized armed groups composed mainly of Greek army officers and volunteers brought from Crete, the Peloponnese and other parts of Greek populated areas, and even worked with Pavlos Melas. He also recruited local Macedonian Greeks such as the chieftain Vangelis Strebreniotis from the village of Srebreni (now Asprogeia), and Konstantinos Kottas, a former member of IMRO, who in 1903, under the orders of Karavangelis, killed and beheaded Bulgarian revolutionary Lazar Poptraykov. The head was delivered to Karavangelis, which he placed on his desk and photographed.

In 1905, Karavangelis was present when Orthodox priest Kristo Negovani conducted the Divine Liturgy in the Albanian Tosk dialect. Karavangelis denounced the usage of Albanian in mass and under his orders had Negovani murdered. In 1905, Karavangelis also ordered the slaughter of resisting Bulgarian inhabitants in the village of Zagorichani (today Vasileiada).