| Country: | South Korea |
| Flag Year: | 1949 |
| Previous Election: | 1960 |
| Election Date: | 26 November 1963 |
| Next Election: | 1967 |
| Turnout: | 72.11% (12.24pp) |
| Seats For Election: | All 175 seats in the National Assembly |
| Majority Seats: | 88 |
| Party1: | Democratic Republican Party (South Korea) |
| Leader1: | Park Chung Hee |
| Percentage1: | 33.48 |
| Last Election1: | new |
| Seats1: | 110 |
| Party2: | Civil Rule Party |
| Leader2: | Yun Posun |
| Percentage2: | 20.12 |
| Last Election2: | new |
| Seats2: | 41 |
| Party3: | Democratic Party (South Korea, 1955) |
| Leader3: | Park Soon-cheon |
| Percentage3: | 13.60 |
| Last Election3: | 175 |
| Seats3: | 13 |
| Party4: | People's Party (South Korea, 1963) |
| Leader4: | Kim Byeong-ro |
| Percentage4: | 8.84 |
| Last Election4: | new |
| Seats4: | 2 |
| Color5: |
|
| Party5: | Liberal Democratic |
| Leader5: | Kim Jun-yeon |
| Percentage5: | 8.09 |
| Last Election5: | new |
| Seats5: | 9 |
| Map: | Republic_of_Korea_legislative_election_1963_districts_result.png |
| Speaker | |
| Before Election: | None |
| After Election: | None |
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.
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.
| Region | Total seats | Seats won | |||||
|---|---|---|---|---|---|---|---|
| DRP | CR | DP | LDP | PP | |||
| Seoul | 14 | 2 | 7 | 4 | 1 | 0 | |
| Busan | 7 | 6 | 1 | 0 | 0 | 0 | |
| Gyeonggi | 13 | 7 | 5 | 1 | 0 | 0 | |
| Gangwon | 9 | 7 | 0 | 1 | 1 | 0 | |
| North Chungcheong | 8 | 6 | 1 | 0 | 1 | 0 | |
| South Chungcheong | 13 | 8 | 3 | 0 | 0 | 2 | |
| North Jeolla | 11 | 7 | 4 | 0 | 0 | 0 | |
| South Jeolla | 19 | 12 | 3 | 1 | 3 | 0 | |
| North Gyeongsang | 20 | 19 | 1 | 0 | 0 | 0 | |
| South Gyeongsang | 15 | 12 | 2 | 1 | 0 | 0 | |
| Jeju | 2 | 2 | 0 | 0 | 0 | 0 | |
| Constituency total | 131 | 88 | 27 | 8 | 6 | 2 | |
| PR list | 44 | 22 | 14 | 5 | 3 | 0 | |
| Total | 175 | 110 | 41 | 13 | 9 | 2 | |