Apollon XI was an Epirotiki Lines cruise ship, which was named after both the Greek sun god Apollo and the Apollo 11 mission that landed the first humans on the Moon.

Initially it was built as a passenger ship under the name Irish Coast for Coast Lines Ltd, Glasgow.

In 1968 she was acquired by Epirotiki and changed several names (Orpheus in 1968, then Semiramis II and Achilleus in 1969) until she took the final name Apollon XI (or Apollon 11) and was rebuilt as a cruise ship.

On 11 October 1989, she ran aground due to the typhoon Dan and was subsequently towed to Manila (Philippines) for demolition.

The Apollon XI and another Epirotiki ship, the MTS Oceanos, were featured in the 1986 film Hardbodies 2.