First-order subdivisions

Tel Aviv (district)

Tel Aviv District (Hebrew: מחוז תל אביב) is one of six Israeli administrative districts, seat Tel Aviv; smallest in area, densest at 8,900/km², about 1.52 million residents, share fell from 43% (1948) to 20% (2015).

Teleorman

Teleorman (Județul Teleorman) is a county in southern Romania on the Danube border with Bulgaria, seat Alexandria, agrarian economy, area 5,790 km², population 313,033 (2025), reestablished 1968.

Temburong District (دائيره تمبوروڠ)

Temburong District (دائيره تمبوروڠ) is Brunei's eastern exclave district, separated by Sarawak's Limbang and Brunei Bay. Area 1,304 sq km, population 9,444 (2021), five mukims, capital Bangar, connected by the 30-km Sultan Haji Omar 'Ali Saifuddien Bridge since 2020.

Terengganu (ترڠݢانو)

Terengganu (ترڠݢانو), Terengganu Darul Iman, is a sultan-ruled Malaysian state on the east coast of Peninsular Malaysia: 1,149,440 people (2020), capital Kuala Terengganu, 1911 self-government law, RM40.6 billion GDP in 2025.

Ternopil Oblast

Ternopil Oblast (Тернопільська область) is a western Ukrainian oblast established in 1939, capital Ternopil; 13,823 km², about 1.05 million people, 3 raions, agricultural Podolian Upland region with the 214-km Optimist cave.

Theme of Cherson

The theme of Cherson was a Byzantine military-administrative province in the Crimea, established in 841 under Emperor Theophilos and transformed into a katepanate in the eleventh century.

Theme of Hellas

The theme of Hellas (θέμα Ἑλλάδος, Thema Hellados) was a Byzantine military-civilian province in eastern-central Greece, including Attica and Euboea, created between 687 and 695 to defend against Slavic incursions.

Theme of the Peloponnese

The theme of the Peloponnese (θέμα Πελοποννήσου) was a Byzantine military-administrative province covering the southern Greek peninsula, created between 783 and 812 with its capital at Corinth.

Thừa Thiên Huế province

Thừa Thiên Huế (tỉnh Thừa Thiên Huế) was a North Central Coast Vietnamese province; from 1 January 2025 its entire territory became the centrally governed city of Huế under Resolution 175/2024/QH15, with a two-tier ward structure from July 2025.

Thuringia

Thuringia (Thüringen, Freistaat Thüringen) is a German federal state with capital Erfurt, about 2.13 million people and 16,173 km2. First unified 1920, dissolved 1952, re-established 1990; AfD won the 2024 state election.

Ticino

Ticino (Repubblica e Cantone Ticino) is Switzerland's southernmost, entirely Italian-speaking canton, created in 1803 by Napoleon's Act of Mediation from former confederate bailiwicks south of the Gotthard, with Bellinzona as capital and red-blue flag.

Tierra del Fuego Province, Argentina

Tierra del Fuego, Antártida e Islas del Atlántico Sur is Argentina's southernmost province, provincialized by Law 23.775 in 1990, with capital Ushuaia, Antarctic-sector territory, gas, fishing, and cruise tourism.

Tiflis Governorate

Tiflis Governorate (Тифлисская губерния) was a province of the Russian Empire in the Caucasus from 1846 to 1917, with its capital at Tiflis, now Tbilisi.

Tigray Region (ትግራይ)

Tigray (ትግራይ) is the northernmost regional state of Ethiopia, a highland region whose capital is Mekelle and the historic heartland of the kingdom of Aksum.

Tillaberi Region

Tillaberi Region (région de Tillabéri), western Niger, capital Tillaberi city; 97,251 km2, about 3.37 million people (2018). Part of Liptako-Gourma tri-border zone with Mali and Burkina Faso; Niger's region most affected by jihadist violence and displacement.

Tỉnh Bình Thuận

Tỉnh Bình Thuận (Binh Thuan Province), a South Central Coast Vietnamese province with capital Phan Thiet, ~7,813 km², 192 km coastline, ~1.2 million people; merged into Lâm Đồng on 1 July 2025.

Tỉnh Cao Bằng

Cao Bằng Province (tỉnh Cao Bằng), a mountainous northeastern Vietnamese province bordering China's Guangxi over 311 km; area 6,700.4 km², kept unchanged in the 2025 mergers, 56 communes/wards since July 2025, home to Ban Gioc and Non Nuoc Geopark.

Tỉnh Ðiện Biên

Điện Biên (Dien Bien) province, Northwest Vietnam; only province bordering both Laos and China (over 455 km). Area 9,539.93 km², 673,091 people, 45 commune-level units, site of the 1954 Battle of Dien Bien Phu.

Tỉnh Lạng Sơn

Tỉnh Lạng Sơn (Lang Son Province), northeastern Vietnam border province on the 231-km Guangxi frontier; capital Lang Son; Huu Nghi and Dong Dang international gates, UNESCO Global Geopark 2024, unchanged in 2025 reorganization.

Tỉnh Nghệ An

Nghệ An is a coastal province in north central Vietnam and, until the 2025 provincial reorganization, the country's largest by area; its capital is Vinh and it is the birthplace of Hồ Chí Minh.

Tỉnh Quảng Ninh

Tỉnh Quảng Ninh (Quang Ninh Province), northeastern Vietnamese province formed 30 October 1963 from Hai Ninh and Hong Quang; named by Ho Chi Minh; became centrally governed Quang Ninh City on 1 September 2026 under Resolution 36/2026/QH16.

Tipaza Province

Tipaza Province (ولاية تيبازة) is Algeria's wilaya No. 42 on the Mediterranean, about 70 km west of Algiers; 861,796 people, 28 communes, UNESCO Roman ruins of Tipasa and the Royal Mausoleum of Mauretania.

Tizi Ouzou Province

Tizi Ouzou Province (Tizi Wezzu, wilaya 15) in Grande Kabylie, northern Algeria, capital Tizi Ouzou city; Djurdjura mountains, Mediterranean coast, 1,290,575 people (2008), tourism and handicrafts.

Tlaxcala

Tlaxcala (Tlaxcallan), a central Mexican state named for the pre-Hispanic Nahua confederation of Tepeticpac, Ocotelulco, Tizatlán, and Quiahuixtlán that resisted the Mexica, allied with Cortés in 1519, and later became a colonial province and modern state.