Sena เสนา
District
Khlong in Chao Chet
District location in Phra Nakhon Si Ayutthaya province
Coordinates: 14°19′38″N 100°24′16″E / 14.32722°N 100.40444°E / 14.32722; 100.40444
Country	Thailand
Province	Phra Nakhon Si Ayutthaya
Seat	Sena
Tambon	17
Muban	132
Area
• Total	205.6 km2 (79.4 sq mi)
Population  (2012)
• Total	66,670
• Density	313.4/km2 (812/sq mi)
Time zone	UTC+7 (ICT)
Postal code	13110
Geocode	1412

Sena (Thai: เสนา, pronounced [sěːnāː]) is a district (amphoe) in Phra Nakhon Si Ayutthaya province, central Thailand. Local people typically know the populated centre of Sena as Ban Phaen (บ้านแพน).^[1]

Neighboring districts are (from the north clockwise) Phak Hai, Bang Ban, Bang Sai (บางไทร), Lat Bua Luang and Bang Sai (บางซ้าย) of Ayutthaya Province.

The district is divided into 17 sub-districts (tambon), which are further subdivided into 132 administrative villages (muban). Sena is a town covering the whole Sena sub-district. There are four sub-district municipalities (thesaban tambon) − Sam Ko and Bang Nom Kho cover the whole same-named sub-district, Hua Wiang the whole sub-district Hua Wiang and Ban Krathum, and Chao Chet the whole sub-district Chao Sadet and parts of the sub-district Chao Chet and Ban Thaeo. There are a further nine tambon administrative organizations as the local government for the sub-districts not part of a municipality.