- April - October: Friday and Sunday from 10am - 3pm
- Closed Monday, Tuesday, Wednesday, Thursday, Saturday, and all major holidays
- A variety of special events, workshops, and tours offered throughout the year
- Formal school programs following NJ Core Curriculum standards are also offered
- Visitor’s Center exhibits focus on the social, cultural, and natural history of the area
- ADA accessible visitor's center and first floor of the mill
- $5 per person
Cooper Gristmill
66 Route 24, Chester, NJ 07930
908-879-5463
Travel back in time to Milltown, a thriving community situated along the Black River. Built in 1826, Cooper Gristmill was once the heart of a thriving industrial community and played a vital role in the area's development during the Industrial Revolution. The Gristmill is the only restored water-powered mill in New Jersey and is listed on the State and National Registers of Historic Places. Witness the amazing power of the Black River, harnessed to run a steel water wheel and grind grains into flour using massive 2,000-pound millstones. These grinding stones can produce up to 800 pounds of flour per hour. Visitors are invited to take home stone-ground flour and cornmeal produced at the Gristmill.
WHAT TO SEE AND DO
- Learn about the social, agricultural, and technological aspects of life in the nineteenth and early twentieth centuries
- Embark on a guided tour of the Gristmill led by period-clothed staff
Journey through Jersey strives to have the most up-to-date information, but always check with the site itself before planning a visit.

