Saint Berthild, also known as Bertille or Bertilla (died 692), was abbess of Chelles Abbey in France.

Berthild was born into one of the most illustrious families in the territory of Soissons, France, during the reign of Dagobert I.

[1] She entered the nunnery of Jouarre in Brie, not far from Meaux, founded in 630 by Ado, the elder brother of Saint Ouen, who had taken the monastic habit there.

Berthild was educated by Saint Thelchildis, the first abbess of Jouarre, who governed that abbey until 660.

After the death of her husband in 655, she was left regent of the kingdom during the minority of her son Clotaire III, but as soon as he was of age to govern in 665, she retired to Chelles Abbey.