Zacharias Paulusz (c. 1570-1590 – 1648) was a Dutch Golden Age portrait painter from Alkmaar.

According to Houbraken he painted the "Old" or "St. George" schutterij in Alkmaar in 1620, 1627, and 1628, the last of which he saw as an over-the-mantel piece in the "Hopman's" room of the old militia meeting hall in Alkmaar.

He signed his works with the monogram ZP fecit.

[2] The Stedelijk Museum Alkmaar has four militia pieces by him on display.

After the Reformation the civic guard was reorganized and secularized (they no longer kept altars to St. George and St. Sebastian in the church).