| Country: | South Korea |
| Flag Year: | 1949 |
| Previous Election: | 1954 |
| Election Date: | 2 May 1958 |
| Next Election: | 1960 |
| Turnout: | 87.80% (3.34pp) |
| Seats For Election: | All 233 seats in the House of Representatives |
| Majority Seats: | 117 |
| Party1: | Liberal Party (South Korea) |
| Leader1: | Syngman Rhee |
| Percentage1: | 42.07 |
| Last Election1: | 114 |
| Seats1: | 126 |
| Party2: | Democratic Party (South Korea, 1955) |
| Leader2: | Chough Pyung-ok |
| Percentage2: | 33.99 |
| Last Election2: | 15 |
| Seats2: | 79 |
| Party3: | Unification Party (South Korea) |
| Percentage3: | 0.63 |
| Last Election3: | new |
| Seats3: | 1 |
| Party4: | Independents |
| Leader4: | – |
| Percentage4: | 21.67 |
| Last Election4: | 68 |
| Seats4: | 27 |
| Map: | Republic_of_Korea_legislative_election_1958_districts_result.png |
| Speaker | |
| Before Party: | Liberal Party (South Korea) |
| After Election: | Lee Ki-poong |
| After Party: | Liberal Party (South Korea) |
Legislative elections were held in South Korea on Friday 2 May 1958.[1] The result was a victory for the Liberal Party, which won 126 of the 233 seats. Voter turnout was 87.8%.
The elections were held under first-past-the-post voting.
| Region | Total seats | Seats won | ||||
|---|---|---|---|---|---|---|
| LP | DP | UP | Ind. | |||
| Seoul | 16 | 1 | 14 | 0 | 1 | |
| Gyeonggi | 25 | 14 | 8 | 0 | 3 | |
| Gangwon | 20 | 15 | 2 | 0 | 3 | |
| North Chungcheong | 13 | 8 | 4 | 0 | 1 | |
| South Chungcheong | 22 | 15 | 6 | 0 | 1 | |
| North Jeolla | 24 | 10 | 11 | 0 | 3 | |
| South Jeolla | 32 | 18 | 10 | 1 | 3 | |
| North Gyeongsang | 38 | 24 | 8 | 0 | 6 | |
| South Gyeongsang | 40 | 20 | 15 | 0 | 5 | |
| Jeju | 3 | 1 | 1 | 0 | 1 | |
| Total | 233 | 126 | 79 | 1 | 27 | |