Ho-Ho-Kus Brook is a tributary of the Saddle River (which is itself a tributary of the Passaic River) in Bergen County, New Jersey, in the United States.^[1]

The brook originates in Mahwah.

Ho-Ho-Kus Brook joins the Saddle River at the Dunkerhook area of Saddle River County Park. Their confluence marks the border of four Bergen County communities: Ridgewood, Paramus, Glen Rock and Fair Lawn.^[1]

While it flows it marks the border between Mahwah and Wyckoff.

These are the communities that the Ho-Ho-Kus Brook passes along:^{[citation needed]}

• Mahwah
• Franklin Lakes
• Wyckoff
• Allendale
• Waldwick
• Ho-Ho-Kus
• Ridgewood^[1]
• Glen Rock^[1]

• List of rivers of New Jersey

• U.S. Geological Survey: NJ stream gaging stations

40°58′11″N 74°06′32″W / 40.969688°N 74.108966°W / 40.969688; -74.108966