Kujūkuri(九十九里町,Kujūkuri-machi) is a town located in Sanbu District, Chiba Prefecture, Japan. As of April 2012, the town had an estimated population of 17,466 and a population density of 736 persons per km. The total area was 23.72 km.

Kujūkuri owes its name to its beach, Kujūkuri Beach, which is Japan's second longest. The word "Kujūkuri" roughly translates to mean "ninety-nine ri", with "kujūku" meaning "ninety-nine" and "ri" being an old unit of measurement equating to approximately 600 meters.