Peter I of Aragon (circa 1068-1104) was king of Aragon and Navarre from 1094 to 1104. He was the son of Sancho I of Aragon (a.k.a Sancho V of Navarre, a.k.a Sancho Ramirez) and Felicia of Urgell , and he succeeded his father Sancho in 1094.

He conquered Huesca in 1096.