Cottekill is a small hamlet in the northwest part of the Town of Rosendale, Ulster county, New York in the United States. Located in the Rondout Valley, it is approximately 2.25 miles east of the hamlet of Stone Ridge, 2.5 miles northwest of Rosendale Village, 8.75 miles south of the city of Kingston and 10.9 miles north of the village of New Paltz. As of 2014, the population was listed at 451. It features a Post Office (12419) and its own fire department. The Brookside School, a private school for children with developmental disabilities is located here as well as the Sustainable Living Resource Center, a project of Sustainable Hudson Valley. SUNY Ulster, a Community College, is nearby in Stone Ridge. There is also the Marbletown-Rosendale Rail Trail, curving along the old New York, Ontario and Western Railway tracks, paralleling Lucas Avenue. It starts at Leggett Road, crosses the Cottekill Creek on a wooden footbridge and travels north to Cottekill Road, past the Cottekill Fire House. It continues north from the firehouse, along the O & W path, crosses Marcott Road and comes out on Route 209.