John I, Count of Holland

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John I (1284-1299) was count of Holland and son of Count Floris V. John inherited the county in 1296 after the murder of his father.

He was raised in England at the court of Edward I of England and married princess Elizabeth of England, a daughter of and his first Queen consort Eleanor of Castile in 1297. He returned to Holland in 1296 after the murder of his father. His regent, Wolfert van Borselen, had a policy of neutrality towards Flanders and England. The cities didn't like Van Borselen. He was murdered in 1299. Count John I of the house of Avesnes took over the reign as regent, for a few months. Count John I of Holland died childless in 1299, only fifteen years-old.

With his death without descendants, the heirs to the county of Holland were his cousins of Hainaut, sons of John's great-aunt Adelaide of Holland. Between this date to the extinction of Hainaut as an independent county, Holland formed a personal union with Hainaut.