North Lambton Secondary School is a Canadian public school in Forest, Ontario. It is operated by the Lambton Kent District School Board. It was originally named Forest High School and subsequently Forest District High School. Around 480 students are currently attending NLSS. Its feeder elementary schools are Plympton-Wyoming, Watford, Grand Bend and Forest as well as Hillside School on the Kettle and Stony Point First Nation and Bosanquet Central outside Thedford.