The Tilden Ladies' Seminary, also known as the Tilden Female Seminary, was dedicated on September 19, 1855, in West Lebanon, New Hampshire, United States. The school was named after William Tilden, who was born in West Lebanon and became rich in New York City through his business, the manufacture and export of varnish. Instruction took place in a school on a hill above the Connecticut River. The four-story brick school for girls was notable in that, unlike the typical private school started by an individual and held in the founder's home, it was chartered by the legislature of New Hampshire and occupied a purpose-built building.