List of the oldest buildings in New Hampshire

This article attempts to list the oldest buildings in the state of New Hampshire in the United States of America, including the oldest houses in New Hampshire and any other surviving structures from the First Period. Some dates are approximate and based on architectural studies and historical records, other dates are based on dendrochronology. All entries should include citation with reference to: architectural features; a report by an architectural historian; or dendrochronology; or else be denoted as estimates in the separate lower list.