Mill Hill Park Windmill, Historical windmill in Mill Hill Park, County Dublin, Ireland

Mill Hill Park Windmill is a cylindrical rubble-stone tower, roofless and without sails, standing on high ground in Mill Hill Park near Skerries. The tapering walls rise to a broken rim where the timber cap once turned; a doorway and small window openings pierce the masonry. It is a recorded National Monument and the highest point in the park, with views over the surrounding countryside.

Mill Hill Park Windmill is a 16th-century tower mill, built around 1578, and is recorded as one of the oldest industrial structures in County Dublin. It was erected to grind grain for the local area and remained in use for centuries, with repairs and alterations made as milling technology and demand changed. It now stands as a ruin within the public park.

The windmill's name is tied to Mill Hill, the rise in Mill Hill Park where it stands above the village of Skerries. It is a local landmark rather than a working mill, and the park around it is used for walks and recreation. The stump of the tower is what remains after the sails and machinery were removed.

The tower stands within Mill Hill Park in the Mill Hill area of Saggart, near the County Dublin and County Kildare boundary. Access is on foot along the park's paths; the ground around the base is uneven grass, so sturdy shoes help. Parking is in the village, and the tower is best seen in daylight.

Mill Hill Park Windmill is a sham ruin: it was built around 1800 as a decorative folly for the nearby mill complex, not as a working mill. Its tapering stone tower and battered walls were designed to look ancient, and it later served as a viewing point over the city.