Hornchurch Abbey was a medieval monastery located in Hornchurch, Essex, England. Founded in the 12th century, it was established by the Cistercian order and played a significant role in the religious and economic life of the area. The abbey was known for its agricultural contributions and was a center for spiritual life until its dissolution in the 16th century. After the dissolution, much of the abbey's stone was repurposed for local building projects, leading to its gradual decline. Today, remnants of Hornchurch Abbey can be found in the surrounding area, serving as a historical reminder of its once-prominent presence in medieval England.