Old First Church is an historic Presbyterian church building at 125 Main Street in Huntington, Suffolk County, New York. It was built in 1784 and is a two and one-half-story building with a steeply pitched gable roof. About 1900, a two-story, five-gable-roofed addition was completed on the rear of the building. It features a tall, square, five-story bell tower that dominates the center of the main facade.