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First-order subdivisions

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Changwat Narathiwat

Changwat Narathiwat (จังหวัดนราธิวาส), Thailand's southernmost province on the Malaysian border, capital at Narathiwat town; Malay Muslim majority, insurgency-affected, 13 districts, population about 824,000, distinct from Pattani and Yala.

Changwat Nong Khai

Changwat Nong Khai (หนองคาย), Nong Khai Province, is a Thai border province in upper northeastern Isan on the Mekong opposite Vientiane, Lao PDR; established 1915, split to create Bueng Kan in 2011, Thailand's main Laotian trade gateway via the Thai-Lao Friendship Bridge.

Changwat Pathum Thani

Changwat Pathum Thani (จังหวัดปทุมธานี), formerly Sam Khok, is a central Thai province north of Bangkok in the Bangkok Metropolitan Region: 1,525.8 km², 1.2 million people, seven districts, Chao Phraya River lowlands prone to recurrent flooding.

Changwat Pattani

Changwat Pattani (จังหวัดปัตตานี), a southern Thai province on the Gulf of Thailand, 1,940.35 sq km, 12 districts, 740,904 people (2024); former core of the Patani Sultanate, incorporated into Siam by the 1909 Anglo-Siamese treaty.

Changwat Phatthalung

Changwat Phatthalung (พัทลุง), a southern Thailand province on Songkhla Lake near Ok Thalu Mountain; birthplace of Nang Talung shadow play and Nora dance, home to Thale Noi Waterfowl Park, with the highest poverty ratio in Thailand.

Changwat Phayao

Changwat Phayao (จังหวัดพะเยา), Thailand's 72nd province, created from Chiang Rai on 28 August 1977; northern province of hills, Kwan Phayao lake, and the Yom River headwaters.

Changwat Phetchaburi

Changwat Phetchaburi (เพชรบุรี), Thai province TH-76 on the Gulf of Thailand bordering Myanmar; 6,225 km², about 484,000 residents, Kaeng Krachan National Park, agriculture, and major tourism at Cha-am.

Changwat Phichit

Changwat Phichit (จังหวัดพิจิตร), a province of lower northern Thailand, area 4,531 km², 12 districts, on the Nan and Yom rivers; birthplace of King Sanphet VIII, home of Bueng Si Fai and the September long boat race.

Changwat Phitsanulok

Changwat Phitsanulok (จังหวัดพิษณุโลก) is a province of lower northern Thailand, named after its capital city of Phitsanulok on the Nan River. It covers about 10,816 square kilometers and had a population of about 895,000 in 2021.

Changwat Phrae

Changwat Phrae (จังหวัดแพร่) is a mountain-ringed province in northern Thailand on the upper Yom River, about 555 km north of Bangkok, with its capital at the town of Phrae.

Changwat Prachin Buri

Changwat Prachin Buri (จังหวัดปราจีนบุรี), an eastern Thai province 136 km from Bangkok, area 4,762 km², population about 498,550, 7 districts, home to Khao Yai, Thap Lan, and Pang Sida National Parks, and not part of the EEC.

Changwat Prachuap Khiri Khan

Changwat Prachuap Khiri Khan (ประจวบคีรีขันธ์) is a Thai province on the Gulf of Thailand, 13 km wide at its narrowest on the Isthmus of Kra, home to Hua Hin resort and Khao Sam Roi Yot National Park.

Changwat Ratchaburi

Changwat Ratchaburi (ราชบุรี), a western central Thailand province on the Mae Klong River bordering Myanmar; 861,879 residents, 5,196 km², Dvaravati-era heritage, Damnoen Saduak Floating Market, and 42.7 percent of western regional revenue.

Changwat Roi Et

Changwat Roi Et (จังหวัดร้อยเอ็ด) is a province in Thailand's Northeast (Isan), seat at Roi Et town on Bung Phlan Chai lake; known for jasmine rice, khaen handicrafts, Wat Buraphaphiram's 68-meter walking Buddha, and a 1921-established provincial treasury office.

Changwat Samut Prakan

Changwat Samut Prakan (จังหวัดสมุทรปราการ), or Pak Nam, is a Thai province at the Chao Phraya mouth bordering Bangkok. 1,004 km², six districts, about 1.36 million people, industrial and logistics hub with Ancient City and Phra Samut Chedi.

Changwat Saraburi

Changwat Saraburi (จังหวัดสระบุรี), Saraburi Province, is an upper central Thai province northeast of Bangkok: 3,576 km², Aw climate, Pa Sak River, Thailand's cement heartland (about 89% of national capacity), and the Phra Phutthabat pilgrimage shrine.

Changwat Si Sa Ket

Changwat Si Sa Ket (จังหวัดศรีสะเกษ), Sisaket Province, a Thai province in lower northeastern Isan, formerly Khukhan until 1938; borders Cambodia, area 8,840 km², 22 districts, population about 1.44 million.

Changwat Songkhla

Changwat Songkhla (จังหวัดสงขลา), a southern Thai province on the Gulf of Thailand bordering Malaysia's Kedah and Perlis; 16 districts, 7,393.9 sq km, Hat Yai commercial hub, UNESCO Creative City of Gastronomy 2025, major November 2025 floods.

Changwat Sukhothai

Changwat Sukhothai (จังหวัดสุโขทัย), a province of lower northern Thailand, site of the first Thai kingdom and UNESCO World Heritage historical parks; 9 districts, about 6,596 km², Yom River, population about 578,000.

Changwat Suphan Buri

Changwat Suphan Buri (จังหวัดสุพรรณบุรี) is a central Thai province on the Tha Chin River, about 100 km from Bangkok, an ancient Dvaravati-era town and Ayutthaya frontier site of Naresuan's 1592 elephant duel.

Changwat Surat Thani

Changwat Surat Thani (จังหวัดสุราษฎร์ธานี), usually shortened to Surat, is a province on Thailand's Gulf coast and the largest in the south, known for Ko Samui and Ko Pha-ngan.

Changwat Surin

Changwat Surin (จังหวัดสุรินทร์), Surin Province, is a lower Isan province of Thailand, home of the Kuy elephant handlers of Ban Ta Klang, the annual Surin Elephant Festival at Si Narong Stadium, Khmer prasat, and silk weaving; population about 1.36 million (2024).

Changwat Trang

Changwat Trang (จังหวัดตรัง), Trang Province, is a southern Thai province on the Andaman Sea, 828 km from Bangkok, area 4,917.519 sq km, population 634,959 (2024), a historic seaport and Thailand's rubber-planting pioneer, a province since 1932.

Changwat Ubon Ratchathani

Changwat Ubon Ratchathani (อุบลราชธานี), a province of Thailand's Northeastern region bordering Laos and Cambodia; about 1.87 million registered residents (2023), capital Ubon Ratchathani city, Mun River, Emerald Triangle, Candle Festival.

Changwat Udon Thani

Changwat Udon Thani (จังหวัดอุดรธานี) is a province in upper Isan, northeastern Thailand, capital Udon Thani city. Founded 1907 at Ban Mak Khaeng after the 1893 Franco-Siamese treaty; area 11,730 km²; home to the Ban Chiang World Heritage site.

Changwat Yala

Changwat Yala (ยะลา), Thailand's southernmost province on the Malaysian border, one of the three deep-south provinces; area 4,521 km², population about 553,000, rubber- and fruit-based economy under a long-running emergency decree.

Changwat Yasothon

Changwat Yasothon (จังหวัดยโสธร), Yasothon Province, a lower Isan province of Thailand created in 1972 from Ubon Ratchathani districts; 9 districts, about 4,162 square kilometers, famed for its Rocket Festival and Hom Mali rice.

Charente-Maritime

Charente-Maritime (17), a Nouvelle-Aquitaine department on France's Atlantic coast, prefecture La Rochelle; 672,279 inhabitants (2023), 6,864 km², 470 km of coast, islands Ré and Oléron, leading French oyster-farming department.

Chari-Baguirmi Region

Chari-Baguirmi, a region of Chad in the southwest, capital Massenya; 621,785 people at the 2009 census, named for the Chari River and the historic Baguirmi kingdom.

Chatham County, Georgia, United States

Chatham County, Georgia, a coastal county established 1777 as one of Georgia's original eight counties, seat at Savannah; population 311,855 (2025 estimate), fifth of 159 counties, economy anchored by the Port of Savannah, the nation's No. 4 container seaport.