| Name of Town | Date of Foundation | Basis / Source |
| Basay, Negros Oriental | 15 June 1968 | R.A. 5421 s. of 1968 |
Basay was formerly a barrio under the Municipality of Bayawan, in the Province of Negros Oriental. It was created as a municipality by virtue of Republic Act No. 5421, enacted on 15 June 1968.
Reference:
Republic Act No. 5421: An Act Creating the Municipality of Basay in the Province of Negros Oriental. Official Gazette of the Republic of the Philippines 65, no. 28 (1969): 7098.
