In 1917, the district's name was changed from Khlong Phon (คลองพล) to Khlong Thom.[1]
Administration
The district is divided into seven sub-districts (tambons), which are further subdivided into 67 villages (mubans). There are two sub-district municipalities (thesaban tambons): Khlong Thom Tai and Khlong Phon, each covering parts of the same-named tambons. Each tambon has a tambon administrative organization (TAO), responsible for the area not belonging to any of the municipalities.
The residents of tambon Klong Phon's Ban Tha Maphrao community were the recipients of the 2018 Mechai Viravaidya Award. The award, funded by the Stock Exchange of Thailand Foundation, honours communities for outstanding social development initiatives. The award was granted for the community's reforestation of several thousand rai of mangrove forest destroyed years earlier by shrimp farmers. Today, about 70 percent of community residents, over 2,000 people, are able to earn around 500 baht per day by selling mangrove crabs, black crabs, and other marine life they catch in the forest or local waters.[3]