History
The district goes back to Mueang Phen, which was a subordinate of Mueang Nong Khai. In 1907 it became a district, then named Mueang Phen within Udon Thani province. In 1917 it was renamed to Phen.
The district goes back to Mueang Phen, which was a subordinate of Mueang Nong Khai. In 1907 it became a district, then named Mueang Phen within Udon Thani province. In 1917 it was renamed to Phen.