The 1877 airship sighting refers to a series of reports from the United States regarding a mysterious airship observed across several states. Witnesses described a large, cigar-shaped craft with lights, allegedly moving at high speeds and executing maneuvers beyond the era's known technology. Reported over several months, the airship's origin and purpose remained unknown, sparking public intrigue. This event stands as one of history's earliest airship sightings, preceding the prominent 1890s wave.