Phasi Charoen (Thai: ภาษีเจริญ, pronounced [pʰāː.sǐː t͡ɕā.rɤ̄ːn]) is one of the 50 districts (Khet) of Bangkok, Thailand.

Originally Phasi Charoen proposed to fund the project in exchange for the right to collect tolls for passage.

It was approved by King Mongkut, however, with the fund given via tax deduction from the amount Phra Phasi Sombat Boriboon had to collect, thus making the canal toll-free.

Construction began in 1866 and was completed in 1872 and the canal was named after the man who had overseen the project.

The missing number 3, 4 and 5 belong to the sub-districts which were split off to form Bang Khae district.