Šemovec Breški is located in the City of Ivanić-Grad, in Zagreb County at an elevation of 99 meters above sea level and it covers the area of 2.25 km² (0.87 sq. miles). According to the 2011 census report, there were 83 inhabitants. It is predominantly populated by Croats (97%), but also Bosniaks (3%). Nearby places: Greda Breška, Zaklepica, Zelina Breška, Posavski Bregi, Opatinec, Jalševec Breški, Lepšić, Ivanić-Grad, Trebovec and Tarno.