Khlong Luang (Thai: คลองหลวง, pronounced [kʰlɔ̄ːŋ lǔa̯ŋ]) is a district (amphoe) in Pathum Thani province, central Thailand.

When the community became bigger, people expanded agriculture until it was close to Thung Luang (now Thanyaburi district).

King Rama V ordered a canal, Khlong Rangsit, to be built for agricultural purposes for the people in the Thung Luang and Bang Wai area.

When the canal was finished, the government changed the name of the district to Khlong Luang to commemorate King Rama V's foresight.

[1] Neighboring districts are (from the north clockwise): Bang Pa-in and Wang Noi of Phra Nakhon Si Ayutthaya province; Nong Suea, Thanyaburi, Mueang Pathum Thani, and Sam Khok of Pathum Thani Province.