1,726 articles
Riyadh Region
Riyadh Region (Ar Riyadh), one of Saudi Arabia's 13 administrative regions, contains the capital Riyadh and Diriyah. Largest by population (8,591,748 in 2022), second by area, established by the 1992 Law of the Provinces.
Rizal
Province of Rizal (Lalawigan ng Rizal), a Philippine province east of Metro Manila created June 11, 1901 from Manila Province and Morong district; dismembered 1975; now Antipolo city plus 13 municipalities, 3.4 million people.
Rize Province
Rize Province (Rize ili), eastern Black Sea province of Turkey with capital Rize city; 346,947 people (2025), 12 districts. Turkey's rainiest province (2,300 mm/year) and its tea heartland, producing roughly 65–78% of national tea.
Rogaland Fylke
Rogaland (Rogaland fylke), Norwegian county number 11 in southwest Norway, 23 municipalities, Stavanger seat, over 500,000 inhabitants, fourth largest by population, oil and gas economy, unchanged by the 2020 region reform.
Roman Dacia
Roman Dacia: the Danubian province Trajan created in 106 CE from the Dacian kingdom, the only Roman province entirely north of the Danube, divided by Hadrian in 129 and abandoned by Aurelian around 271 CE.
Roman Egypt
Roman Egypt: the province Rome annexed in 30 BCE after Cleopatra VII's death, ruled by an equestrian prefect as the emperor's personal domain, the empire's grain source until the Arab conquest of 642 CE.
Roman Gaul
Roman Gaul (Gallia): Roman provinces over most of modern France, Belgium and neighboring lands, from Narbonensis (121 BCE) through Caesar's conquest (58–51 BCE), Augustus's four-province division, Gallo-Roman civilization, and the end of Roman rule in the fifth century.
Roman province
Roman province (Latin provincia): territory outside Italy governed by a Roman magistrate. Originally a magistrate's task, not a place; provinces funded the state from 167 BC until Diocletian's provincial doubling and the diocese-prefecture system.
Rondônia
Rondônia, a Brazilian Amazon state with capital Porto Velho, created as Território do Guaporé in 1943 and a state in 1981; 1.58 million people (2022), heavy agribusiness, and among the most deforested Amazon states.
Roraima
Roraima, Brazil's northernmost state, capital Boa Vista; a federal territory until the 1988 Constitution made it a state. Least populous state, borders Venezuela and Guyana, main Venezuelan migration corridor.
Rostov Oblast (Ростовская область)
Rostov Oblast (Ростовская область), a federal subject of Russia in the Southern Federal District with capital Rostov-on-Don; formed 13 September 1937; area 100.8 thousand km²; population 4,137.3 thousand (2025); major agrarian and industrial region on the lower Don.
Royal Prussia
Royal Prussia (Prusy Królewskie) is a historical region comprising Gdańsk Pomerania, Warmia, and the Chełmno land, an autonomous province of Poland from 1466 until its 1772 annexation by Prussia.
Rukwa (district)
Rukwa is a region in southwestern Tanzania, capital Sumbawanga, divided into Sumbawanga, Nkasi, and Kalambo districts; 1,540,519 residents in the 2022 census, area 27,765 km², created in 1974.
Russian Soviet Federative Socialist Republic (Российская Советская Федеративная Социалистическая Республика)
The Russian Soviet Federative Socialist Republic (RSFSR, Российская СФСР) was the largest republic of the USSR, proclaimed 1917, a founding Soviet republic in 1922, renamed the Russian Federation in 1991 as its legal successor.
Ryanggang
Ryanggang Province (량강도, also romanized Yanggang) is a province in far northern North Korea on the border with China, created in 1954 from South Hamgyong Province, with its capital at Hyesan.
Ryazan Oblast
Ryazan Oblast (Рязанская область), a federal subject of Russia in the Central Federal District, formed 26 September 1937; capital Ryazan, area 39.6 thousand km², population about 1.07 million, GRP 816.7 billion rubles in 2024.
Sabah
Sabah (Malaysia's second largest state, 72,500 sq km on northern Borneo, "Land Below the Wind"): population 3.42 million (2020), GDP RM88.8 billion (2025), joined Malaysia 16 September 1963, capital Kota Kinabalu, GRS-led government after the 2025 election.
Sabaragamuwa Province
Sabaragamuwa Province, a province of Sri Lanka (Ratnapura and Kegalle districts), capital Ratnapura; 4,968 km2, 2,015,899 people (2024), known for gem mining, tea, and Sinharaja Forest Reserve.
Saga-ken
Saga-ken (佐賀県), or Saga Prefecture, is a Japanese prefecture in northwestern Kyushu with capital Saga City, 781,214 residents (2025 census), 2,440.67 km2, 10 cities and 10 towns, and famous Arita and Imari porcelain.
Sagaing Region
Sagaing Region, northwestern Myanmar's largest region (94,621 km², capital Sagaing city), agricultural and mining area with the Naga Self-Administered Zone; since 2021 the epicenter of civil war resistance and the country's highest displacement.
Saginaw County
Saginaw County, Michigan: county in Mid-Michigan, seat Saginaw, organized 1835 after Lewis Cass's 1822 proclamation. Population 190,124 (2020); manufacturing-led economy and presidential bellwether county.
Saint Andrew, Jamaica
Saint Andrew, Jamaica: most populous of Jamaica's 14 parishes (573,369 in 2011), capital Half-Way Tree, area 434.5 km2, formerly Liguanea, established 1867, administered with Kingston by the KSAC since 1923.
Saint Catherine
Saint Catherine (St. Catherine) is Jamaica's most populous parish, 542,763 in 2022, on the south coast in Middlesex county, capital Spanish Town, founded 1534, Jamaica's capital until 1872; includes Portmore municipality and the Rio Cobre.
Saint Clair County, Illinois, United States
St. Clair County, Illinois, established April 27, 1790 and named for Arthur St. Clair, is Illinois' first county; county seat Belleville, part of the St. Louis Metro-East, population about 250,708 (2025 estimate).
Saint Michael, Barbados
Saint Michael is Barbados's most populous and most urban parish, containing the capital Bridgetown, the Historic Bridgetown and its Garrison UNESCO site, St. Michael's Cathedral, and the Nidhe Israel Synagogue; area 39 km².
Saitama Prefecture (埼玉県)
Saitama Prefecture (埼玉県), an inland prefecture of Japan on the Kanto Plain with capital Saitama City, also called Sainokuni; 63 municipalities, 7.29 million people (2025 census, first decline since 1920), Chichibu Mountains in the west.
Sakarya
Sakarya (Turkish province, center Adapazarı), named after the Sakarya River; became a province in 1954 from Kocaeli. Automotive-led economy, 1.11 million people (2025), near the North Anatolian Fault Zone.
Sakha (Саха Өрөспүүбүлүкэтэ)
Sakha (Yakutia; Саха Өрөспүүбүлүкэтэ), Russia's largest federal subject at 3,083.5 thousand km² in northeastern Siberia, a diamond-mining republic with sovereignty declared 27 September 1990 and extensive ice-rich permafrost.
Sakhalin Oblast (Сахалинская область)
Sakhalin Oblast (Сахалинская область), Russia's only island oblast, comprises Sakhalin Island and the Kuril Islands in the Far Eastern Federal District. Capital Yuzhno-Sakhalinsk; 87.1 thousand km²; oil, gas, and fishing economy; formed 2 January 1947.
Sălaj
Sălaj (Județul Sălaj, Szilágy) is a county in northwestern Romania, seat Zalău, in the Nord-Vest region; formed 1876 from Crasna and Middle Solnoc, reestablished 1968, population about 210,000.