Sielec may refer to the following places:
Belarus Sialiec, Biaroza Raion (western Belarus)
Poland
Sielec, Inowrocław County, Kuyavian-Pomeranian Voivodeship (north-central Poland) Sielec, Żnin County, Kuyavian-Pomeranian Voivodeship (north-central Poland) Sielec, Gmina Opoczno, Łódź Voivodeship (central Poland) Sielec, Gmina Żarnów, Łódź Voivodeship (central Poland) Sielec, Lublin Voivodeship (east Poland) Sielec, Grójec County, Masovian Voivodeship (east-central Poland) Sielec, Płońsk County, Masovian Voivodeship (east-central Poland) Sielec, Tarnobrzeg, Podkarpackie Voivodeship Sielec, Podkarpackie Voivodeship Sielec, Subcarpathian Voivodeship (south-east Poland) Sielec, Busko County, Świętokrzyskie Voivodeship (south-central Poland) Sielec, Jędrzejów County, Świętokrzyskie Voivodeship (south-central Poland) Sielec, Staszów County, Świętokrzyskie Voivodeship (south-central Poland) Sielec-Kolonia, Świętokrzyskie Voivodeship
Ukraine Sielec, Drohobych Raion in Lviv Oblast (western Ukraine)
See also Sielecki, a Polish surname