The Second Reformed Church of Hackensack is a church in Hackensack, New Jersey located at the intersections of Anderson, Union and Ward Streets. The church is a member of the Reformed Church in America. Some of Louis Comfort Tiffany's favorite stained glass windows are at the church. Tiffany would bring clients to the church to help them select from the church's broad designs. There are 10 Tiffany windows ranging in design from realistic styles to impressionistic styles.