Erard I, Count of Brienne (1060–1114) was Count of Brienne at the end of the 11th century. He was the son of Walter I of Brienne, count of Brienne, and his wife Eustachie of Tonnerre. When Erard inherited the county of Brienne, he was invested by Theobald III, Count of Blois.
Erard co-founded an abbey at Boulancourt, and later founded a monastery at Beaulieu. In 1114, Erard followed his liege lord, Hugh, Count of Champagne, to the Holy Land.
In 1110 he married Alix of Roucy-Ramerupt, daughter of André de Montdidier-Roucy, seigneur de Ramerupt and son of Hilduin IV, Count of Montdidier. They had: