Johan, or Jan Lagoor (1620 - 1660), was a Dutch Golden Age painter.
He was born in Gorinchem but moved to Haarlem by 1645 where he married and became a member of the Haarlem Guild of St. Luke.[1] In 1649 he was a vinder of the guild and during the years 1645-1651 he was a member of the Haarlem schutterij.[1] In 1653 he moved to Amsterdam where his daughter was baptized in 1658. He was declared bankrupt in 1659 and left the city, and nothing is known of him after that.