Sidoarjo — Kota Delta — the Delta City, also Kota Udang (Shrimp City)

Quick facts

• About 2.04 million residents in the 2025 regency count, while BPS projects 2.19 million
• 719.34 km² split into 18 kecamatan, 318 desa and 28 kelurahan
• Official birthday: 31 January 1859, when a colonial decree created the regency as Sidokare; it was renamed Sidoarjo that May
• Manufacturing makes up almost half the economy: 49.45% of GRDP in 2025
• Home to Juanda International Airport, in Sedati district
• A flat delta 0–25 m above sea level, with brackish fishponds along the eastern coast

Best time to visit

May–November (drier months)

Rain is light for most of this stretch, so it is the easiest time for the coast, temple ruins and outdoor markets. Daytime highs still reach 31–33°C.

Late January (Hari Jadi Sidoarjo, 31 January)

The regency's anniversary (Harjasda) is marked with an official ceremony at the alun-alun, which reopened after a revamp on 27 January 2026, in time for the 167th anniversary.

December–April (wet season)

This is when most of the year's rain falls. Plan indoor stops for the afternoons and keep a rain jacket handy.

Tips

• Trans Jatim corridor 1 runs the main road from Terminal Porong through Sidoarjo town to Terminal Purabaya for Rp5,000 (students Rp2,500), paid by QRIS or cash.
• Commuter Line trains stop at Waru, Gedangan, Sidoarjo, Tanggulangin, Porong and Krian. They are timetabled, so check departures in the Access by KAI app first.
• Juanda Airport is in Sedati: domestic flights use Terminal 1 and international flights Terminal 2.
• Middays are hot all year, with average highs of about 31–33°C. Go out early or late and carry water.
• Lontong kupang (shellfish with rice cake in a petis broth) is the signature local dish, often eaten with sate kerang.
• Keep small notes for parking, angkot-style minibuses and street stalls.