Širinci is located in the municipality Okučani, in Slavonski Brod-Posavina County at an elevation of 205 meters above sea level and it covers the area of 16.85 km² (6.51 sq. miles). According to the 2011 census report, there were only two inhabitants left. but also. Nearby places: Čaprginci, Žuberkovac, Šagovina Mašićka, Bobare, Trnakovac, Benkovac, Donji Rogolji, Ratkovac, Smrtić and Cage.