Niemodlin [ɲeˈmɔdlʲin] (German:Falkenberg) is a town in Opole County, Opole Voivodeship, Poland, with 6,911 inhabitants (2004).

It was first mentioned as Nemodlin in a 1224 deed and received town privileges in 1283. Originally a part of the Duchy of Opole, after the death of Duke Bolko I Niemodlin became the capital of a duchy in his own right from 1313 to 1382. When the Opole line of the Piast dynasty became extinct in 1532, various noble families like the House of Zierotin and the Prazma (German Praschmas) held the estate (also known as Falkenberg) until the 1940s, leaving a Renaissance castle, built about 1600.