Odysseas Androutsos (Greek: Οδυσσέας Ανδρούτσος; 1788–1790 – 1825; born Odysseas Verousis Οδυσσέας Βερούσης) was a Greek armatolos in eastern continental Greece and a prominent figure of the Greek War of Independence.

Born in Ithaca, the son of an Arvanite klepht and privateer from Roumeli and a Greek mother from a family of notables from Preveza in the Ionian Islands. He joined the court of his father's old friend, the Ottoman Albanian ruler Ali Pasha of the increasingly independent Pashalik of Yanina, became one of his commanders and was appointed armatolos of Livadeia in 1816. In 1818 or 1820 he became a member of the Greek revolutionary organization Filiki Eteria.

When Ali Pasha rebelled against the Sultan, Androutsos initially supported Ali, but he abandoned besieged Yannina for the Ionian Islands in October 1820. He joined the Greek War of Independence in 1821, and he was distinguished as a commander in the Battle of Gravia Inn in May 1821. As a result of the battle, he was appointed military commander of eastern mainland Greece by the Greek revolutionary government. Androutsos was twice accused by the Greek revolutionary government of treachery owing to his negotiating initiative with his Albanian enemies as a means of effective distraction when he could not repel them. In 1824 Androutsos did not take sides in the Greek civil war. After falling out with the rebels in 1825, he asked for and received amnesty from the Imperial court, switching allegiances permanently and joining the army of the Ottoman Albanian ruler Omer Vrioni, pasha of Ioannina. In a battle near Livadeia, he was captured by the units of the revolutionary army and executed a few days later.

Scholars have variously described him as a hero or a traitor to the Greek cause in the Greek War of Independence. In Greece he is today considered one of the most prominent heroes of the Greek War of Independence.

Androutsos born in Ithaca between 1788 and 1790. His father was Andreas Verousis (Greek: Ανδρέας Βερούσης, Albanian: Andruc Verushi), an Albanian and klepht from Livanates, in Phthiotis prefecture, who sought to become armatolos of Livadeia and later cooperated with Ali pasha, became again a klepht and finally joined Lambros Katsonis (Greek: Λάμπρος Κατσώνης) as a privateer in the Greek insurrection of 1770. He was raised by his mother Akrivi Tsarlampa (Greek: Ακριβή Τσαρλαμπά), a native of Preveza. His godparents were Maria Sofianou, Katsonis's wife, and Ioannis Zavos, a notable of Ithaca, who gave him a name that relates to the reappropriation of antiquity by Orthodox Christians in the context of the modern Greek Enlightenment.

Odysseas did not get to know his father, who was captured in 1792 and committed to an Ottoman jail, where he died. He was raised by his mother's family of wealthy notables from Preveza, who also moved in Lefkada and Ithaki. In the Ionian islands, ruled by Western powers at the time, he grew up in a social environment that received modern ideas, including the reevaluation of Greek antiquity by Greek Enlightenment scholars. After his mother's family participated in the failed defense of Preveza against the attack of Ali Pasha in 1798, they sought refuge to Lefkada, where Odysseas was raised for two years along with future poet Ioannis Zambelios.

As his family probably faced economic difficulties, influenced by his father's fame and, as per his biographers, due to his father's old acquaintance with Ali Pasha, at a certain point between 1805 and 1810 Odysseas opted to follow a career as a man of arms and decided to join Ali's army in Ioannina, signifying a shift of his family's orientation towards the only stable power of the area. Odysseas is recorded to have taken part and displayed his military qualities in Ali's campaign against Berat, Gjirokastër and the Christians of Kardhiq. Androutsos was among Ali's closest military personnel, who also became members of his personal guard. In March 1814 he had become the leader of Ali's personal guard. In Ali's court Androutsos became one of his distinguished armatoles. Most of the armatoles had learned their military skills among the Christian Albanian Souliotes and other Albanian groups who had a renowned tradition in irregular warfare. Androutsos also managed to learn Albanian and Italian fluently. Androutsos was influenced by Ali Pasha's political attitudes and behavior: as such Androutsos became later particularly notorious for his brutality, suspiciousness and personal ambition. Androutsos was soon found in antagonism with Ali's men, as such Ali had ordered his execution but was saved after intervention by Alexis Noutsos. While at Yanina, Odysseas, influenced by the religiously liberal environment of the city and probably in an effort to enter a support network, joined the Bektashi order, as Ali pasha is also said to have. Religion was not a determinant factor for Odysseas and, even during the Greek Revolution, two of his most trusted lieutenants were Muslim.

In 1816 Ali Pasha positioned him as armatolos of Livadeia in eastern central Greece. In a short time Odysseas managed to restore security in his region, with minor klephts, like Yannis Gouras, joining his tayfa and stronger, like Dimitrios Panourgias, being forced to submit, and implemented Ali's policy and traditional armatole practice of raids in neighboring areas, namely Athens and Evia. With Ali's support and using despotic methods, he came into conflict with Christian and Muslim notables and succeeded in curbing their power. While an armatolos, he used his authority to increase his economic power, formed a close circle of trusted lieutenants, like Gouras and Angelis Govginas, amassed considerable mobile property, married Eleni Kareli, daughter of a notable of Kalarrytes, and emerged as the most powerful man of arms in eastern Central Greece. It seems that he was promoted to general derven-aga of eastern Central Greece, a superintendent of the region's armatoloi.