Peter I of Cyprus or Pierre I de Lusignan (October 9, 1328 in Nicosia – January 17, 1369 in Palace of La Cava, Nicosia) is King of Cyprus and titular King of Jerusalem from his father's abdication on November 24, 1358 until his own death in 1369.

He is also Latin King of Armenia from either 1361 or 1368.

He os the second son of Hugh IV of Cyprus, the first by his second wife Alice of Ibelin.

He is also invested as titular Count of Tripoli when young, in 1346.

He is the greatest King of Cyprus on a military basis, where he has great success.

He is unable to complete many plans, due to internal dispute that culminates in his assassination at the hands of three of his own knights.