Sidayu is an administrative district (id:kecamatan) in Gresik Regency, part of East Java Province of Indonesia. The district, which is situated to the northwest of the town of Gresik, covers a land area of 47.13 km2 and had a population of 44,542 in mid 2024.Badan Pusat Statistik, Jakarta, 28 February 2025, Kabupaten Gresik Dalam Angka 2025 (Katalog-BPS 1102001.3525) The district has a long history associated with merchants.
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