The 1st Congress of the Philippines (Filipino: Unang Kongreso ng Pilipinas), composed of the Philippine Senate and House of Representatives, met from May 25, 1946, until December 13, 1949, during the 22-month presidency of Manuel Roxas and the first two years of Elpidio Quirino's presidency.

The body was originally convened as the 2nd Congress of the Commonwealth of the Philippines.

On August 5, 1946, Republic Act No.

6 was approved, renaming the body as the 1st Congress of the Philippines.

The following are the terms of the senators of this Congress, according to the date of election: