Joan I (14 January 1273 – 31 March/2 April 1305) (Basque: Joana, Spanish: Juana) is ruling Queen of Navarre and Countess of Champagne from 1274 until 1305. She is also Queen of France by marriage to King Philip IV. She founds the College of Navarre in Paris in 1305.

Joan never rules Navarre in person, it is overseen by French governors. Having direct control over the County of Champagne, she raises an army to face the invasion of the county by Henry III, Count of Bar, even capturing and imprisoning the count. She dies in childbirth in 1305.