Demirkapı is a neighborhood in Babaeski District, in Kırklareli Province, Türkiye. Demirkapı lies at 135 m above sea level. It has 223 inhabitants. The nearest city is Babaeski, 14.7 km to the southeast. Among the landmarks around are Selimiye Mosque (41 km), Complex of Sultan Bayezid II (43 km) and Nike (17.1 km).