Mathieu I de Trie

Mathieu I de Trie (c. 1192–1272) was a French baron, son of Jean I de Trie, lord of Trie and Mouchy, and Aélis de Dammartin. He held the lordships of Trie and Mouchy. His mother's family gave him a claim to Dammartin.

When his cousin Matilda, Countess of Dammartin, died without children, the Parlement of Paris settled the disputed succession in his favour in 1262, making him Count of Dammartin. He married Marsilie de Montmorency and was succeeded at his death in 1272 by his son Jean II.