Legislative elections were held in South Korea on 26 November 1963.^[1] They were the first held after the 1961 coup and subsequent approval of a new constitution the previous December, which inaugurated the Third Republic. All candidates had to run under the banner of a political party.

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1963 South Korean legislative election

← 1960 26 November 1963 1967 →
All 175 seats in the National Assembly 88 seats needed for a majority
Turnout	72.11% ( 12.24pp)
Party Leader % Seats +/– Democratic Republican Park Chung Hee 33.48 110 New Civil Rule Yun Posun 20.12 41 New Democratic Park Soon-cheon 13.60 13 −162 People's Kim Byeong-ro 8.84 2 New Liberal Democratic Kim Jun-yeon 8.09 9 New This lists parties that won seats. See the complete results below. Results by constituency

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The result was a victory for the Democratic Republican Party of coup leader Park Chung Hee, which won 110 of the 175 seats in the National Assembly. Voter turnout was 72.1%.

The unicameral National Assembly was elected by parallel voting, with 131 legislators elected in single-member constituencies and 44 allocated via a modified formula on the national level, excluding parties that did not win more than three seats or more than 5% of the valid vote. If the percentage of votes for the first-placed party was over 50%, the national seats would be allocated in proportion to vote share, with the first-placed party being limited to two-thirds of the available national seats (it would then be eliminated from further consideration for national seats). When the number of votes of the top party was less than 50%, half of the seats in the national constituency were automatically allocated to the first-placed party (which was then eliminated from further consideration for national seats), and the process repeated for the remaining parties (meaning the second place party would now be considered the "top party" for purposes of the next allocation) until all remaining seats were allocated.