Mill Hill is a historic neighborhood located within the city of Trenton in Mercer County, in the U.S. state of New Jersey.

In a symbolic act that ended up carrying significant weight for the neighborhood, the then Mayor of Trenton, Arthur J. Holland, moved his family to 138 Mercer Street in 1964.

"Mayor Arthur Holland and his young wife were idealistic newlyweds with a baby daughter in 1964 when they decided to restore a house in Trenton's crumbling, if historic, Mill Hill neighborhood.

Initially focused on the 100 blocks of Mercer and Jackson Streets, some residents began renovating their homes.

[8] Atlantis was formed by the members of the Mill Hill community themselves (in the early 1990s) to preserve and restore the historic homes - starting with the properties at 261 and 263 Jackson Street.

It was added to the National Register of Historic Places on December 12, 1977, for its significance in architecture, commerce, and military history.

[11] A marble statue of George Washington, once owned by Mahlon Dickerson Eyre and displayed at the Centennial Exposition in 1876, is located near the Douglass House.

Washington is shown standing on a boat, symbolically representing his crossing of the Delaware River before his victory at the Battle of Trenton.