Adam Mikołaj Sieniawski (1666–1726) was a Polish noble (szlachcic), military leader. Son of Hetman Mikołaj Hieronim Sieniawski and the daughter of Court and Grand Marshal Prince Aleksander Ludwik Radziwiłł, Princess Cecylia Maria Radziwiłł, He married Elżbieta Lubomirska, daughter of Court and Grand Marshal Prince Stanisław Herakliusz Lubomirski, in 1687. He was voivode of Bełz Voivodeship from 1692 to 1710, Field Crown Hetman since 1702, Great Crown Hetman since 1706, Castellan of Kraków since 1710. Starost of Lviv, Rohatyn, Lubaczów, Stryj and Piaseczno.