Karageorgis (Greek: Καραγιώργη) was an international shipping line founded by Michail A. Karageorgis, in Greece in between 1930 and 1934. It operated under the names Michail A. Karageorgis S.A., Karageorgis Lines, and Karageorgis Cruises.

The company was founded by Michail Karageorgis (Μιχαήλ Αριστομένη Καραγεώργη)[1899-1995] in 1934 with the acquisition of his first ship Roula. In 1962, his son Aristomenis Karageorgis (1933 - 2014) would take over the company.

In 1969, Harima Heavy Industries of Japan ordered three tankers from Karageorgis, scheduled to be delivered in March, April, and July 1972.

In March 1971, it was reported Karageorgis planned to set up a shipyard and steel plant in the port of Pylos Navarino.

In an interview with Nautical Chronicles on March 15, Michail revealed the companies plans to pursue passenger business. In September 1971, Karageorgis purchased four used cargo-passenger liners from the Ellerman Lines for £1,250,000. Later that year, it was discussed whether Karageorgis, or Chandris Line would buy Cunard Line's out dated ships. The first of the Ellerman ships to relaunch under Karageorgis was announced to be Mediterranean Sea, the former City of Exeter.

In September 1973, an order was placed to the Canadian shipbuilding company Marine Industries, for six new cargo vessels.

In December 1973, Karageorgis placed an order for five tankers to the Finnish company Wartsila.

The plans for development in Pylos was approved by the Greek government, and was supported by the local villagers. However environmentalists protested the project, and the Archaeological counsel rejected the plans on June 17, 1975.