A constitutional referendum was held in the Philippines on 14 November 1967. On 16 March 1967 Congress decided that a Constitutional Convention would be elected in 1971. In preparation for the election, two amendments to the constitution were proposed beforehand.^[1] Voters were asked whether they approved of two amendments to the Constitution of the Philippines; one to increase the number of members of the House of Representatives from 120 to 180, and one to allow members of Congress to be elected to Constitutional Conventions without giving up their Congress seats.^[1] A petition seeking to stop the referendum was filed before the Supreme Court, but was dismissed five days before the referendum.^[2][3] Both proposals were rejected by voters.

Quick Facts Outcome, Results ...

1967 Philippine constitutional plebiscite

November 14, 1967
Are you in favor of increasing the number of congressmen from 120 to 180?
Outcome	Proposal rejected
Results
Choice Votes  % Yes 737,997 18.28% No 3,299,485 81.72% Total votes 4,037,482 100.00% Registered voters/turnout 9,744,604 41.43%
Results by province and city
Yes:   50–60%   60–70%   70–80%   80–90%   90-100% No:   50–60%   60–70%   70–80%   80–90%   90-100%

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Quick Facts Outcome, Results ...

Are you in favor of allowing members of Congress to serve in the coming Constitutional Convention without forfeiting their seats?
Outcome	Proposal rejected
Results
Choice Votes  % Yes 652,127 16.56% No 3,286,879 83.44% Total votes 3,939,006 100.00% Registered voters/turnout 9,744,604 40.42%
Results by province and city
Yes:   50–60%   60–70%   70–80%   80–90%   90-100% No:   50–60%   60–70%   70–80%   80–90%   90-100%

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A Constitutional Convention was subsequently elected on 10 November 1970, and began work on a new constitution on 6 January 1971. A draft was published on 29 November 1972 and put to a referendum on 15 January 1973.^[4]

The 1967 Agusan division plebiscite was also held on this day. Unlike the national plebiscite, the division of Agusan province to two provinces, Agusan del Norte and Agusan del Sur, was approved by the voters.

The 1967 Philippine Senate election was also held on this day. While the government lost the plebiscite, the ruling Nacionalista Party won six of the eight seats contested in the election.

The 1967 Philippine House of Representatives special elections were also held on this day. The Nacionalistas also won all five of the seats contested.