| Official Name: | Thung Phaya Thai |
| Native Name: | ทุ่งพญาไท |
| Settlement Type: | Khwaeng |
| Subdivision Type: | Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Bangkok |
| Subdivision Type3: | Khet |
| Subdivision Name3: | Ratchathewi |
| Area Total Km2: | 2.559 |
| Area Footnotes: | [1] |
| Population As Of: | 2018 |
| Population Total: | 32,744 |
| Population Density Km2: | 12,795.62 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Postal Code Type: | Postal code |
| Blank Name: | TIS 1099 |
Thung Phaya Thai (th|ทุ่งพญาไท, pronounced as /th/) is a khwaeng (subdistrict) of Ratchathewi District, downtown Bangkok.
This area formerly known as "Thung Phaya Thai", a vast field in the area of inner capital, it covers the area from the outskirts of Dusit Palace next to the Thung Som Poi (now is the location of Chitralada Royal Villa[2]) to the Victory Monument and Phaya Thai Palace today. The next area was known as "Thung Bang Kapi" of Bang Kapi and Wang Thonglang with Huai Khwang Districts in present day.
Although it was an inner city area, but the atmosphere in the past, it was a rural countryside and fresh air. Khlong Phaya Thai, a khlong (canal) which was approximately two km (1.24 mi) long, flows through the area.
Therefore, King Rama V bought more than a thousand rai (more than 395 acres) of land here. He ordered the construction of Phaya Thai Palace in 1910 along the banks of Khlong Samsen, as well as having to build a road connecting Hua Lamphong Road (now Rama IV Road), pass Pathum Wan Road (now Rama I Road), parallel to Pra Chae Chin Road (now Phetchaburi Road), cuts across eastern railway line and Duang Tawan Road (now Si Ayutthaya Road), as far as ending at Pao Road (now Phahonyothin Road), called "Phaya Thai Road".
The king and his wife, Queen Saovabha Phongsri used the palace as a royal retreat, and the king used this place to test the cultivation as well.
In addition, in those days, this palace was also used as a place to hold up to the Royal Ploughing Ceremony, which was a ceremony that has existed since ancient times to give the morale to farmers in the beginning of the planting season. After King Rama V passed away in 1910, Queen Saovabha Phongsri used this place as a residence until she died in 1919.[3]
This area was also residence to Muslims as well.[4]
Currently, although the fields have disappeared, Khlong Phaya Thai was filled in to allow the road to be built, until it became just a small waterway in Phramongkutklao Hospital, but the name "Thung Phaya Thai" is still used for this area, and due to the numerous modifications of Bangkok administration making Thung Phaya Thai become part of Ratchathewi District to the present.[5]
The area is bordered by neighbouring subdistricts (from north clockwise): Phaya Thai and, Sam Sen Nai in Phaya Thai District (Khlong Sam Sen is a borderline), Makkasan, and Thanon Phetchaburi in its district (Phaya Thai Road and Si Ayutthaya Road are the borderlines), Suan Chitlada in Dusit District (Northern Railway Line is a borderline).[6]
thumb|250px|Café de Norasingha, café within Phaya Thai Palace.thumb|250px|Victory Monument.thumb|250px|Siam Commercial Bank, Thanon Phetchaburi Branch, one of three oldest and beautiful branches of Siam Commercial Bank.[7]