Vad — a selo (a larger village), the administrative center of Vadsky District of Nizhny Novgorod Region. It is situated on the Vadok River Vadok (a tributary of the The Piana River).
The name derives from the Erzya word ved' — "water".
Founded in 1552. By the 17th century it had grown into a large settlement.
The selo is home to a Natural Monument) — Lake Vad.
District coat of arms
The coat of arms of the selo of Vad features swans. Swans have long nested on the karst Lake Vad.