Sidoarjo Regency

Sidoarjo Kabupaten Sidoarjo
Regency
Sidoarjo Regency
Clockwise from top left: Waru interchange road, Alun-alun Sidoarjo, and Gelora Delta Stadium
Seal
Motto:  Sidoarjo Bersih Hatinya
Location within East Java
Interactive map outlining Sidoarjo Regency
Sidoarjo Location in Java and Indonesia Show map of Java Sidoarjo Sidoarjo (Indonesia) Show map of Indonesia
Coordinates: 7°27′S 112°42′E / 7.450°S 112.700°E / -7.450; 112.700
Country	Indonesia
Province	East Java
Capital	Sidoarjo
Government
• Regent	Subandi [id]
• Vice Regent	Vacant
Area
• Total	714.24 km2 (275.77 sq mi)
Population  (mid 2023 estimate)[1]
• Total	1,996,825
• Density	2,800/km2 (7,200/sq mi)
Time zone	UTC+7 (IWST)
Area code	(+62) 31
Website	sidoarjokab.go.id

Sidoarjo Regency (Javanese: ꦑꦧꦸꦥꦠꦺꦤ꧀ꦱꦶꦢꦲꦂꦗ, romanized: Kabupatèn Sidaharja) is a regency in East Java, Indonesia. It is bordered by Surabaya City and Gresik Regency to the north, by Pasuruan Regency to the south, by Mojokerto Regency to the west, and by the Madura Strait to the east. It has a land area of 719.34 km², making it the smallest regency in East Java,^[2] although it contains many of the southern suburbs of Surabaya and has a high population density.

As at the 2010 census, Sidoarjo Regency had a population of 2,191,489^[3] while the 2020 census showed a small decline to 2,033,760,^[4] notably in the northern part of the regency immediately bordering Surabaya; the official estimate as at mid-2023 showed a further decline to 1,996,825 (comprising 1,000,067 males and 996,758 females).^[1] The regency is part of the urban region surrounding Surabaya, known as the 'Gerbangkertosusila' area.^[5]