# Chai Wan, Udon Thani Province – Subdistricts, Population & Map > Source: https://wherepedia.org/thailand/udon-thani/chai-wan/ District · Udon Thani Province # Chai Wan Chai Wan is a district (amphoe) of Thailand in Udon Thani Province. It had an estimated **22,140 people** in 2023 on 343 km² (about 65 per km²). Its main town is Chaiwan. It is divided into 4 subdistricts. 40 named villages and localities are recorded here, and 54 mapped services such as hospitals, banks and schools. - 22,140people (2023) - 343km² - 4subdistricts - 54mapped services ## How many people live in Chai Wan? Chai Wan had an estimated **22,140 people** in 2023 — 2.4% of Udon Thani Province, 711th of 928 districts. There are 1,053 women for every 1,000 men (close to the Udon Thani Province figure of 1,051). Spread over 343 km², that is about **65 people per km²**, 647th of 928 districts. 24.1% of people are children under 15 and 12.6% are 65 or older; the median age is about 41 years (it is 42 across Udon Thani Province). For every 100 people of working age (15–64) there are 58 children and older people. 0–4 ****1,632** 5–9 ****1,853** 10–14 ****1,842** 15–19 ****1,128** 20–24 ****715** 25–29 ****983** 30–34 ****1,153** 35–39 ****1,450** 40–44 ****1,708** 45–49 ****1,644** 50–54 ****1,778** 55–59 ****1,823** 60–64 ****1,641** 65–69 ****1,324** 70–74 ****679** 75–79 ****398** 80+ ****389** Source: [National Statistics Office of Thailand via OCHA HDX, population 2023 (COD-PS, CC BY-IGO)](https://data.humdata.org/dataset/cod-ps-tha). ## Where is Chai Wan? Chai Wan lies in [Udon Thani Province](https://wherepedia.org/thailand/udon-thani/), [Thailand](https://wherepedia.org/thailand/). It borders 6 other districts: [Ku Kaeo](https://wherepedia.org/thailand/udon-thani/ku-kaeo/), [Nong Han](https://wherepedia.org/thailand/udon-thani/nong-han/), [Sawang Daen Din](https://wherepedia.org/thailand/sakon-nakhon/sawang-daen-din/), [Si That](https://wherepedia.org/thailand/udon-thani/si-that/), [Song Dao](https://wherepedia.org/thailand/sakon-nakhon/song-dao/) and [Wang Sam Mo](https://wherepedia.org/thailand/udon-thani/wang-sam-mo/). By area it is the 545th largest of 928 districts in Thailand. It covers 3.1% of [Udon Thani Province](https://wherepedia.org/thailand/udon-thani/). The centre of Chai Wan is about 488 km in a straight line from Bangkok, the capital. It is about 57 km from Udon Thani, the main town of Udon Thani Province. The centre point is at 17.2282° N, 103.2820° E. Local names: ไชยวาน . Source: [Royal Thai Survey Department via OCHA HDX, administrative boundaries (COD-AB, CC BY-IGO)](https://data.humdata.org/dataset/cod-ab-tha). ## Subdistricts of Chai Wan Subdistrict Area km² Localities Services [Chai Wan](https://wherepedia.org/thailand/udon-thani/chai-wan/chai-wan/) 73 9 34 [Kham Lo](https://wherepedia.org/thailand/udon-thani/chai-wan/kham-lo/) 119 13 8 [Nong Lak](https://wherepedia.org/thailand/udon-thani/chai-wan/nong-lak/) 62 9 8 [Phon Sung](https://wherepedia.org/thailand/udon-thani/chai-wan/phon-sung/) 89 9 4 Source: [Royal Thai Survey Department via OCHA HDX, administrative boundaries (COD-AB, CC BY-IGO)](https://data.humdata.org/dataset/cod-ab-tha); [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/); [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). ## Villages and localities in Chai Wan Open gazetteers list **40 villages, towns and localities** in Chai Wan. The largest with a recorded population: Ban Nong Wua So (21,722). Settlements here lie between about 180 m and 312 m above sea level (median 207 m). - Ban Bong Nua - Ban Chai Wan - Ban Dong Phatthana - Ban Hua Nong Yang - Ban Huai Yang - Ban Kham - Ban Kham Bon - Ban Kham Lo - Ban Kham Muang - Ban Kham Takla - Ban Kham Yang - Ban Na Klang - Ban Na Pu - Ban Noi Kham Mi Non Sawan - Ban Non Muang Wan - Ban Non Sawan - Ban Non Sombun - Ban Nong I U - Ban Nong Khaen - Ban Nong Lak - Ban Nong Mai Tai - Ban Nong Ruea - Ban Nong Saeng - Ban Nong Thom - Ban Nong Tum - Ban Nong Waeng - Ban Nong Waeng Tat - Ban Nong Wua So - Ban Pa Kao - Ban Pa Mai Ngam - Ban Pa Mak Faen - Ban Phia Pu - Ban Phon Sung - Ban Prong Khom - Ban Sa-Ngai - Ban Sa-Nguai - Ban Wang Chomphu - Ban Wang Ngam Phatthana - Chaiwan - Kham Lo Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/); [© OpenStreetMap contributors (ODbL), Geofabrik extract — named settlements](https://www.openstreetmap.org/copyright). ## Landscape and landmarks of Chai Wan Named natural and historic features inside Chai Wan, from the GeoNames gazetteer. ### Water 6 reservoirs and tanks; 6 rivers and streams. - Ang Kep Nam Ban Chaiwan - Ang Kep Nam Huai Ae He - Ang Kep Nam Huai Yot Mai - Ang Kep Nam Kham Lo - Ang Kep Nam Nong Waeng Tat - Ang Kep Nam Plakang - Huai I He - Huai Khi Nak - Huai Kut Khaen Nang - Huai Phai Chan Noi - Huai Tueng - Mae Nam Songkhram ### Hills and mountains 3 hills. - Phu Wang Ngam · 293 m - Phu Mai Rang · 253 m - Phu Thaloe · 232 m Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/). Places of worship are not listed. Elevations are from the GeoNames terrain model and are approximate. ## Weather in Chai Wan and the best time to visit In Chai Wan, the warmest month is Apr (average 31 °C) and the coolest is Dec (21 °C). About 1,434 mm of rain falls in a year; the wettest month is Aug (287 mm) and the driest Dec (5 mm). The most comfortable months for a visit are **October to February**. - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec Month Average °C Rain mm Jan 22 7 Feb 26 18 Mar 29 44 Apr 31 80 May 29 191 Jun 27 197 Jul 27 245 Aug 26 287 Sep 26 244 Oct 25 100 Nov 23 17 Dec 21 5 Source: [NASA POWER climatology, retrieved 2026-10-29](https://power.larc.nasa.gov/). ## Hospitals, banks and other services in Chai Wan Places mapped inside Chai Wan in open map data, by type — each number opens the full list with locations. - Hospitals12 - Banks1 - Petrol pumps3 - Hotels5 - Schools8 - Colleges and universities1 - Pharmacies1 - Restaurants22 - Police stations1 Source: [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). Coverage depends on what has been mapped; contact details are not shown. ## Quick answers - Where is Chai Wan?In Udon Thani Province, Thailand - What is the population of Chai Wan?22,140 (2023 estimate) - What is the median age in Chai Wan?About 41 years (2023 estimate) - What is the population density of Chai Wan?About 65 people per km² - What borders Chai Wan?Ku Kaeo, Nong Han, Sawang Daen Din, Si That, Song Dao and Wang Sam Mo - How many villages are in Chai Wan?40 named settlements (GeoNames, OpenStreetMap) - What is the elevation of Chai Wan?Settlements lie between 180 m and 312 m - How many reservoirs and tanks are in Chai Wan?6 named in GeoNames - What is the highest point in Chai Wan?Phu Wang Ngam (293 m, GeoNames elevation model) - What is the best time to visit Chai Wan?October to February - How many hospitals are in Chai Wan?12 mapped - How many banks are in Chai Wan?1 mapped - How many petrol pumps are in Chai Wan?3 mapped - What is the P-code of Chai Wan?TH4108 (OCHA common operational dataset)