# List of members of the National Assembly (South Korea), 2008–2012

The members of the eighteenth National Assembly of South Korea were elected on 9 April 2008. The Assembly sat from 30 May 2008 until 29 May 2012.

## Members elected in the 2008 election

| Province/city | Constituency | Member | Party |
| Seoul | Jongno | Park Jin | Grand National Party |
| Seoul | Jung | Na Kyung-won | Grand National Party |
| Seoul | Yongsan | Chin Young | Grand National Party |
| Seoul | Seongdong A | Chin Soo-hee | Grand National Party |
| Seoul | Seongdong B | Kim Dong-sung | Grand National Party |
| Seoul | Gwangjin A | Kwon Teag-ky | Grand National Party |
| Seoul | Gwangjin B | Choo Mi-ae | United Democratic Party |
| Seoul | Dongdaemun A | Jang Kwang-keun | Grand National Party |
| Seoul | Dongdaemun B | Hong Joon-pyo | Grand National Party |
| Seoul | Jungnang A | You Jung-hyun | Grand National Party |
| Seoul | Jungnang B | Jin Seong-ho | Grand National Party |
| Seoul | Seongbuk A | Jeong Tae-keun | Grand National Party |
| Seoul | Seongbuk B | Kim Hyo-jae | Grand National Party |
| Seoul | Gangbuk A | Cheong Yang-seog | Grand National Party |
| Seoul | Gangbuk B | Choe Kyoo-sik | United Democratic Party |
| Seoul | Dobong A | Shin Ji-ho | Grand National Party |
| Seoul | Dobong B | Kim Seon-dong | Grand National Party |
| Seoul | Nowon A | Hyun Gyoung-byoung | Grand National Party |
| Seoul | Nowon B | Kwon Young-jin | Grand National Party |
| Seoul | Nowon C | Hong Jung-wook | Grand National Party |
| Seoul | Eunpyeong A | Lee Mi-kyung | United Democratic Party |
| Seoul | Eunpyeong B | Moon Kook-hyun | Creative Korea Party |
| Seoul | Seodaemun A | Lee Sung-hun | Grand National Party |
| Seoul | Seodaemun B | Chung Doo-un | Grand National Party |
| Seoul | Mapo A | Kang Seung-kyoo | Grand National Party |
| Seoul | Mapo B | Kang Yong-seok | Grand National Party |
| Seoul | Yangcheon A | Won Hee-ryong | Grand National Party |
| Seoul | Yangcheon B | Kim Yong-tae | Grand National Party |
| Seoul | Gangseo A | Gu Sang-chan | Grand National Party |
| Seoul | Gangseo B | Kim Sung-tae | Grand National Party |
| Seoul | Guro A | Lee Bun-rae | Grand National Party |
| Seoul | Guro B | Park Young-sun | United Democratic Party |
| Seoul | Geumcheon | Ahn Hyoung-hwan | Grand National Party |
| Seoul | Yeongdeungpo A | Chun Yu-ok | Grand National Party |
| Seoul | Yeongdeungpo B | Kwon Young-se | Grand National Party |
| Seoul | Dongjak A | Jun Byung-hun | United Democratic Party |
| Seoul | Dongjak B | Chung Mong-joon | Grand National Party |
| Seoul | Gwanak A | Kim Song-sik | Grand National Party |
| Seoul | Gwanak B | Kim Hee-chull | United Democratic Party |
| Seoul | Seocho A | Lee Hye-hoon | Grand National Party |
| Seoul | Seocho B | Koh Seung-duk | Grand National Party |
| Seoul | Gangnam A | Lee Jong-koo | Grand National Party |
| Seoul | Gangnam B | Gong Sung-jin | Grand National Party |
| Seoul | Songpa A | Park Young-ah | Grand National Party |
| Seoul | Songpa B | Yoo Il-ho | Grand National Party |
| Seoul | Songpa C | Kim Sung-soon | United Democratic Party |
| Seoul | Gangdong A | Kim Choong-whan | Grand National Party |
| Seoul | Gangdong B | Yoon Seok-yong | Grand National Party |
| Busan | Jung–Dong | Chung Ui-hwa | Grand National Party |
| Busan | Seo | Yoo Ki-june | Independent |
| Busan | Yeongdo | Kim Hyong-o | Grand National Party |
| Busan | Busanjin A | Hur Won-je | Grand National Party |
| Busan | Busanjin B | Lee Jong-heuk | Grand National Party |
| Busan | Dongnae | Lee Jin-bok | Independent |
| Busan | Nam A | Kim Jung-hoon | Grand National Party |
| Busan | Nam B | Kim Moo-sung | Independent |
| Busan | Buk–Gangseo A | Park Min-shik | Grand National Party |
| Busan | Buk–Gangseo B | Huh Tae-yeol | Grand National Party |
| Busan | Haeundae–Gijang A | Suh Byung-soo | Grand National Party |
| Busan | Haeundae–Gijang B | An Kyung-ryul | Grand National Party |
| Busan | Saha A | Hyun Ki-hwan | Grand National Party |
| Busan | Saha B | Cho Kyoung-tae | United Democratic Party |
| Busan | Geumjeong | Kim Se-yeon | Independent |
| Busan | Yeonje | Park Dae-hae | Pro-Park Alliance |
| Busan | Suyeong | Yoo Jae-jung | Independent |
| Busan | Sasang | Chang Je-won | Grand National Party |
| Daegu | Jung–Nam | Bae Young-shik | Grand National Party |
| Daegu | Dong A | Joo Sung-young | Grand National Party |
| Daegu | Dong B | Yoo Seong-min | Grand National Party |
| Daegu | Seo | Hong Sa-duk | Pro-Park Alliance |
| Daegu | Buk A | Lee Myung-gyu | Grand National Party |
| Daegu | Buk B | Suh Sang-kee | Grand National Party |
| Daegu | Suseong A | Lee Hahn-koo | Grand National Party |
| Daegu | Suseong B | Joo Ho-young | Grand National Party |
| Daegu | Dalseo A | Park Jong-keun | Pro-Park Alliance |
| Daegu | Dalseo B | Lee Hae-bong | Independent |
| Daegu | Dalseo C | Cho Won-jin | Pro-Park Alliance |
| Daegu | Dalseong | Park Geun-hye | Grand National Party |
| Incheon | Jung–Dong–Ongjin | Park Sang-eun | Grand National Party |
| Incheon | Nam A | Hong Il-pyo | Grand National Party |
| Incheon | Nam B | Yoon Sang-hyun | Grand National Party |
| Incheon | Yeonsu | Hwang Woo-yea | Grand National Party |
| Incheon | Namdong A | Lee Yoon-sung | Grand National Party |
| Incheon | Namdong B | Cho Jeon-hyeok | Grand National Party |
| Incheon | Bupyeong A | Cho Jin-hyeong | Grand National Party |
| Incheon | Bupyeong B | Koo Bon-chul | Grand National Party |
| Incheon | Gyeyang A | Shin Hak-young | United Democratic Party |
| Incheon | Gyeyang B | Song Young-gil | United Democratic Party |
| Incheon | Seo–Ganghwa A | Lee Hag-jae | Grand National Party |
| Incheon | Seo–Ganghwa B | Lee Kyeong-jae | Independent |
| Gwangju | Dong | Park Joo-sun | United Democratic Party |
| Gwangju | Seo A | Cho Young-teck | United Democratic Party |
| Gwangju | Seo B | Kim Young-jin | United Democratic Party |
| Gwangju | Nam | Kang Woon-tae | Independent |
| Gwangju | Buk A | Kang Gi-jung | United Democratic Party |
| Gwangju | Buk B | Kim Jae-kyun | United Democratic Party |
| Gwangju | Gwangsan A | Kim Dong-cheol | United Democratic Party |
| Gwangju | Gwangsan B | Lee Yong-sup | United Democratic Party |
| Daejeon | Dong | Rim Young-ho | Liberty Forward Party |
| Daejeon | Jung | Kwon Sun-taik | Liberty Forward Party |
| Daejeon | Seo A | Park Byeong-seug | United Democratic Party |
| Daejeon | Seo B | Lee Jae-sun | Liberty Forward Party |
| Daejeon | Yuseong | Lee Sang-min | Liberty Forward Party |
| Daejeon | Daedeok | Kim Chang-su | Liberty Forward Party |
| Ulsan | Jung | Jeong Kab-yoon | Grand National Party |
| Ulsan | Nam A | Choi Byung-gook | Grand National Party |
| Ulsan | Nam B | Kim Gi-hyeon | Grand National Party |
| Ulsan | Dong | Ahn Hyo-dae | Grand National Party |
| Ulsan | Buk | Yoon Doo-hwan | Grand National Party |
| Ulsan | Ulju | Kang Ghil-boo | Independent |
| Gyeonggi Province | Jangan, Suwon | Park Jong-hee | Grand National Party |
| Gyeonggi Province | Gwonseon, Suwon | Chung Mi-kyung | Grand National Party |
| Gyeonggi Province | Paldal, Suwon | Nam Kyung-pil | Grand National Party |
| Gyeonggi Province | Yeongtong, Suwon | Kim Jin-pyo | United Democratic Party |
| Gyeonggi Province | Sujeong, Seongnam | Shin Young-soo | Grand National Party |
| Gyeonggi Province | Jungwon, Seongnam | Shin Sang-jin | Grand National Party |
| Gyeonggi Province | Bundang A, Seongnam | Ko Heung-kil | Grand National Party |
| Gyeonggi Province | Bundang B, Seongnam | Yim Tae-hee | Grand National Party |
| Gyeonggi Province | Uijeongbu A | Moon Hee-sang | United Democratic Party |
| Gyeonggi Province | Uijeongbu B | Kang Sung-jong | United Democratic Party |
| Gyeonggi Province | Manan, Anyang | Lee Jong-kul | United Democratic Party |
| Gyeonggi Province | Dongan A, Anyang | Lee Seok-hyun | United Democratic Party |
| Gyeonggi Province | Dongan B, Anyang | Shim Jae-chul | Grand National Party |
| Gyeonggi Province | Wonmi A, Bucheon | Lim Hae-kyu | Grand National Party |
| Gyeonggi Province | Wonmi B, Bucheon | Lee Sa-churl | Grand National Party |
| Gyeonggi Province | Sosa, Bucheon | Cha Myong-jin | Grand National Party |
| Gyeonggi Province | Ojeong, Bucheon | Won Hye-young | United Democratic Party |
| Gyeonggi Province | Gwangmyeong A | Baek Jae-hyun | United Democratic Party |
| Gyeonggi Province | Gwangmyeong B | Jeon Jae-hee | Grand National Party |
| Gyeonggi Province | Pyeongtaek A | Won Yoo-chul | Grand National Party |
| Gyeonggi Province | Pyeongtaek B | Jung Jang-seon | United Democratic Party |
| Gyeonggi Province | Yangju–Dongducheon | Kim Sung-soo | Grand National Party |
| Gyeonggi Province | Sangnok A, Ansan | Lee Hwa-soo | Grand National Party |
| Gyeonggi Province | Sangnok B, Ansan | Hong Jang-pyo | Pro-Park Alliance |
| Gyeonggi Province | Danwon A, Ansan | Chun Jung-bae | United Democratic Party |
| Gyeonggi Province | Danwon B, Ansan | Park Soon-ja | Grand National Party |
| Gyeonggi Province | Deokyang A, Goyang | Son Beom-gyu | Grand National Party |
| Gyeonggi Province | Deokyang B, Goyang | Kim Tae-won | Grand National Party |
| Gyeonggi Province | Ilsandong, Goyang | Paik Sung-woon | Grand National Party |
| Gyeonggi Province | Ilsanseo, Goyang | Kim Young-sun | Grand National Party |
| Gyeonggi Province | Uiwang–Gwacheon | Ahn Sang-soo | Grand National Party |
| Gyeonggi Province | Guri | Joo Kwang-deok | Grand National Party |
| Gyeonggi Province | Namyangju A | Choi Jae-sung | United Democratic Party |
| Gyeonggi Province | Namyangju B | Park Ki-choon | United Democratic Party |
| Gyeonggi Province | Osan | An Min-suk | United Democratic Party |
| Gyeonggi Province | Hwaseong A | Kim Sung-hoi | Grand National Party |
| Gyeonggi Province | Hwaseong B | Park Bo-hwan | Grand National Party |
| Gyeonggi Province | Siheung A | Baek Won-woo | United Democratic Party |
| Gyeonggi Province | Siheung B | Cho Jeong-sik | United Democratic Party |
| Gyeonggi Province | Gunpo | Kim Boo-kyum | United Democratic Party |
| Gyeonggi Province | Hanam | Moon Hak-jin | United Democratic Party |
| Gyeonggi Province | Paju | Hwang Jin-ha | Grand National Party |
| Gyeonggi Province | Cheoin, Yongin | Ooh Che-chang | United Democratic Party |
| Gyeonggi Province | Giheung, Yongin | Park Jun-seon | Grand National Party |
| Gyeonggi Province | Suji, Yongin | Han Sun-kyo | Independent |
| Gyeonggi Province | Anseong | Kim Hack-yong | Grand National Party |
| Gyeonggi Province | Gimpo | Yoo Jeong-bok | Grand National Party |
| Gyeonggi Province | Gwangju | Chung Chin-sup | Grand National Party |
| Gyeonggi Province | Pocheon–Yeoncheon | Kim Young-woo | Grand National Party |
| Gyeonggi Province | Icheon–Yeoju | Rhee Beum-kwan | Grand National Party |
| Gyeonggi Province | Yangpyeong–Gapyeong | Choung Byoung-gug | Grand National Party |
| Gangwon Province | Chuncheon | Huh Cheon | Grand National Party |
| Gangwon Province | Wonju | Lee Ke-jin | Grand National Party |
| Gangwon Province | Gangneung | Choi Wook-cheul | Independent |
| Gangwon Province | Donghae–Samcheok | Choi Yeon-hee | Independent |
| Gangwon Province | Sokcho–Goseong–Yangyang | Song Hun-suk | Independent |
| Gangwon Province | Hongcheon–Hoengseong | Hwang Young-cheul | Grand National Party |
| Gangwon Province | Taebaek–Yeongwol–Pyeongchang–Jeongseon | Lee Kwang-jae | United Democratic Party |
| Gangwon Province | Cheolwon–Hwacheon–Yanggu–Inje | Lee Yong-sam | United Democratic Party |
| North Chungcheong Province | Sangdang, Cheongju | Hong Jae-hyong | United Democratic Party |
| North Chungcheong Province | Heungdeok A, Cheongju | Oh Jae-sae | United Democratic Party |
| North Chungcheong Province | Heungdeok B, Cheongju | Noh Young-min | United Democratic Party |
| North Chungcheong Province | Chungju | Lee Si-jong | United Democratic Party |
| North Chungcheong Province | Jecheon–Danyang | Song Kwang-ho | Grand National Party |
| North Chungcheong Province | Cheongwon | Byun Jae-il | United Democratic Party |
| North Chungcheong Province | Boeun–Okcheon–Yeongdong | Lee Yong-hee | Liberty Forward Party |
| North Chungcheong Province | Jeungpyeong–Jincheon–Gwisan–Eumseong | Kim Jong-yull | United Democratic Party |
| South Chungcheong Province | Cheonan A | Yang Seoung-jo | United Democratic Party |
| South Chungcheong Province | Cheonan B | Park Sang-don | Liberty Forward Party |
| South Chungcheong Province | Gongju–Yeongi | Sim Dae-pyung | Liberty Forward Party |
| South Chungcheong Province | Boryeong–Seocheon | Ryu Keun-chan | Liberty Forward Party |
| South Chungcheong Province | Asan | Lee Myoung-su | Liberty Forward Party |
| South Chungcheong Province | Seosan–Taean | Byun Ung-jun | Liberty Forward Party |
| South Chungcheong Province | Nonsan–Gyeryong–Geumsan | Rhee In-je | Independent |
| South Chungcheong Province | Buyeo–Cheongyang | Lee Jin-sam | Liberty Forward Party |
| South Chungcheong Province | Hongseong–Yesan | Lee Hoi-chang | Liberty Forward Party |
| South Chungcheong Province | Dangjin | Kim Nak-sung | Liberty Forward Party |
| North Jeolla Province | Wansan A, Jeonju | Lee Moo-young | Independent |
| North Jeolla Province | Wansan B, Jeonju | Jang Se-hwan | United Democratic Party |
| North Jeolla Province | Deokjin, Jeonju | Kim Se-ung | United Democratic Party |
| North Jeolla Province | Gunsan | Kang Bong-kyun | United Democratic Party |
| North Jeolla Province | Iksan A | Lee Choon-suak | United Democratic Party |
| North Jeolla Province | Iksan B | Cho Bae-sook | United Democratic Party |
| North Jeolla Province | Jeongeup | You Sung-yop | Independent |
| North Jeolla Province | Namwon–Sunchang | Lee Kang-rae | United Democratic Party |
| North Jeolla Province | Gimje–Wanju | Choi Kyu-sung | United Democratic Party |
| North Jeolla Province | Jinan–Muju–Jangsu–Imsil | Chung Sye-kyun | United Democratic Party |
| North Jeolla Province | Gochang–Buan | Kim Choon-jin | United Democratic Party |
| South Jeolla Province | Mokpo | Park Jie-won | Independent |
| South Jeolla Province | Yeosu A | Kim Sung-gon | United Democratic Party |
| South Jeolla Province | Yeosu B | Joo Seung-yong | United Democratic Party |
| South Jeolla Province | Suncheon | Suh Gab-won | United Democratic Party |
| South Jeolla Province | Naju–Hwasun | Choi In-kee | United Democratic Party |
| South Jeolla Province | Gwangyang | Woo Yoon-keun | United Democratic Party |
| South Jeolla Province | Damyang–Gokseong–Gurye | Kim Hyo-seuk | United Democratic Party |
| South Jeolla Province | Goheung–Boseong | Park Sang-cheon | United Democratic Party |
| South Jeolla Province | Jangheung–Gangjin–Yeongam | Lew Seon-ho | United Democratic Party |
| South Jeolla Province | Haenam–Wando–Jindo | Kim Yung-rok | Independent |
| South Jeolla Province | Muan–Sinan | Lee Yoon-seok | Independent |
| South Jeolla Province | Hampyeong–Yeonggwang–Jangseong | Lee Nak-yon | United Democratic Party |
| North Gyeongsang Province | Buk, Pohang | Lee Byung-suk | Grand National Party |
| North Gyeongsang Province | Nam, Pohang–Ulleung | Lee Sang-deuk | Grand National Party |
| North Gyeongsang Province | Gyeongju | Kim Il-yun | Pro-Park Alliance |
| North Gyeongsang Province | Gimcheon | Lee Cheol-woo | Grand National Party |
| North Gyeongsang Province | Andong | Kim Gwang-lim | Independent |
| North Gyeongsang Province | Gumi A | Kim Seong-jo | Grand National Party |
| North Gyeongsang Province | Gumi B | Kim Tae-whan | Independent |
| North Gyeongsang Province | Yeongju | Chang Yoon-seok | Grand National Party |
| North Gyeongsang Province | Yeongcheon | Chung Hee-soo | Grand National Party |
| North Gyeongsang Province | Sangju | Seong Youn-hwan | Independent |
| North Gyeongsang Province | Mungyeong–Yecheon | Lee Han-sung | Grand National Party |
| North Gyeongsang Province | Gyeongsan–Cheongdo | Choi Kyung-hwan | Grand National Party |
| North Gyeongsang Province | Goryeong–Seongju–Chilgok | Lee In-ki | Independent |
| North Gyeongsang Province | Gunwi–Uiseong–Cheongsong | Choung Hae-gul | Independent |
| North Gyeongsang Province | Yeongyang–Yeongdeok–Bonghwa–Uljin | Kang Seok-ho | Grand National Party |
| South Gyeongsang Province | Changwon A | Kwon Kyung-seok | Grand National Party |
| South Gyeongsang Province | Changwon B | Kwon Young-ghil | Democratic Labor Party |
| South Gyeongsang Province | Masan A | Lee Ju-young | Grand National Party |
| South Gyeongsang Province | Masan B | Ahn Hong-joon | Grand National Party |
| South Gyeongsang Province | Jinju A | Choi Gu-sik | Independent |
| South Gyeongsang Province | Jinju B | Kim Jae-kyung | Grand National Party |
| South Gyeongsang Province | Jinhae | Kim Hak-song | Grand National Party |
| South Gyeongsang Province | Tongyeong–Goseong | Lee Koon-hyon | Grand National Party |
| South Gyeongsang Province | Sacheon | Kang Ki-kab | Democratic Labor Party |
| South Gyeongsang Province | Gimhae A | Kim Chung-kwon | Grand National Party |
| South Gyeongsang Province | Gimhae B | Choi Chul-kook | United Democratic Party |
| South Gyeongsang Province | Milyang–Changnyeong | Cho Hae-jin | Grand National Party |
| South Gyeongsang Province | Geoje | Yoon Young | Grand National Party |
| South Gyeongsang Province | Yangsan | Heo Beom-do | Grand National Party |
| South Gyeongsang Province | Uiryeong–Haman–Hapcheon | Cho Jin-lae | Grand National Party |
| South Gyeongsang Province | Namhae–Hadong | Yeo Sang-kyoo | Grand National Party |
| South Gyeongsang Province | Sancheong–Hamyang–Geochang | Shin Sung-bum | Grand National Party |
| Jeju Province | Jeju A | Kang Chang-il | United Democratic Party |
| Jeju Province | Jeju B | Kim Woo-nam | United Democratic Party |
| Jeju Province | Seogwipo | Kim Jae-yun | United Democratic Party |
| National | Proportional representation | Kang Myung-soon | Grand National Party |
| National | Proportional representation | Lim Doo-sung | Grand National Party |
| National | Proportional representation | Bae Eun-hee | Grand National Party |
| National | Proportional representation | Kang Sung-chun | Grand National Party |
| National | Proportional representation | Lee Jeong-sun | Grand National Party |
| National | Proportional representation | Kim Jang-soo | Grand National Party |
| National | Proportional representation | Kim So-nam | Grand National Party |
| National | Proportional representation | Chung Jin-suk | Grand National Party |
| National | Proportional representation | Lee Eun-jae | Grand National Party |
| National | Proportional representation | Lee Dal-gon | Grand National Party |
| National | Proportional representation | Kim Kum-lae | Grand National Party |
| National | Proportional representation | Na Seong-lin | Grand National Party |
| National | Proportional representation | Cho Yoon-sun | Grand National Party |
| National | Proportional representation | Cho Moon-hwan | Grand National Party |
| National | Proportional representation | Son Sook-mee | Grand National Party |
| National | Proportional representation | Won Hee-mok | Grand National Party |
| National | Proportional representation | Lee Ae-joo | Grand National Party |
| National | Proportional representation | Lee Choon-sik | Grand National Party |
| National | Proportional representation | Chung Ok-nim | Grand National Party |
| National | Proportional representation | Lim Dong-kyu | Grand National Party |
| National | Proportional representation | Kim Ok-lee | Grand National Party |
| National | Proportional representation | Lee Jung-hyun | Grand National Party |
| National | Proportional representation | Lee Sung-nam | United Democratic Party |
| National | Proportional representation | Park Eun-soo | United Democratic Party |
| National | Proportional representation | Choi Young-hee | United Democratic Party |
| National | Proportional representation | Song Min-soon | United Democratic Party |
| National | Proportional representation | Jeon Hae-sook | United Democratic Party |
| National | Proportional representation | Jeong Kuk-kyo | United Democratic Party |
| National | Proportional representation | Jeon hyun-heui | United Democratic Party |
| National | Proportional representation | Seo Jong-pyo | United Democratic Party |
| National | Proportional representation | Shin Nak-yun | United Democratic Party |
| National | Proportional representation | Choi Moon-soon | United Democratic Party |
| National | Proportional representation | Kim Sang-hee | United Democratic Party |
| National | Proportional representation | Kim Choong-joh | United Democratic Party |
| National | Proportional representation | Park Sun-sook | United Democratic Party |
| National | Proportional representation | Ahn Gyu-baek | United Democratic Party |
| National | Proportional representation | Kim Yoo-jung | United Democratic Party |
| National | Proportional representation | Yang Jeong-lyea | Pro-Park Alliance |
| National | Proportional representation | Suh Chung-won | Pro-Park Alliance |
| National | Proportional representation | Kim Noh-sik | Pro-Park Alliance |
| National | Proportional representation | Song Young-sun | Pro-Park Alliance |
| National | Proportional representation | Kim Eul-dong | Pro-Park Alliance |
| National | Proportional representation | Jeong Ha-gyun | Pro-Park Alliance |
| National | Proportional representation | Jung Young-hee | Pro-Park Alliance |
| National | Proportional representation | Roh Chul-rae | Pro-Park Alliance |
| National | Proportional representation | Lee Young A. | Liberty Forward Party |
| National | Proportional representation | Chough Soon-hyung | Liberty Forward Party |
| National | Proportional representation | Park Sun-young | Liberty Forward Party |
| National | Proportional representation | Kim Yong-gu | Liberty Forward Party |
| National | Proportional representation | Kwak Jung-sook | Democratic Labor Party |
| National | Proportional representation | Hong Hee-deok | Democratic Labor Party |
| National | Proportional representation | Lee Jung-hee | Democratic Labor Party |
| National | Proportional representation | Lee Yong-kyung | Creative Korea Party |
| National | Proportional representation | Lee Han-jung | Creative Korea Party |

## Changes in membership

| Date | Constituency | Incumbent | Party | New member | Party | Party | Notes |
| 11 December 2008 | Proportional representation | Lee Han-jung | Creative Korea | Yu Won-il | | Creative Korea | Incumbent's election invalidated on 11 December 2008; replaced by the next member in the Creative Korea list. |
| 3 March 2009 | Proportional representation | Lee Dal-gon | Grand National | Lee Doo-ah | | Grand National | Incumbent resigned on 3 March 2009 upon appointment as Minister of Public Administration and Security; replaced by the next member in the Grand National list. |
| 29 April 2009 | Bupyeong B, Incheon | Koo Bon-chul | Grand National | Hong Young-pyo | | Democratic | Incumbent's election invalidated on 15 January 2009. New member by-elected. |
| 29 April 2009 | Buk, Ulsan | Yoon Doo-hwan | Grand National | Cho Seung-soo | | New Progressive | Incumbent lost seat on 12 March 2009. New member by-elected. |
| 29 April 2009 | Wansan A, Jeonju, North Jeolla Province | Lee Moo-young | Independent | Shin Kuhn | | Independent | Incumbent's election invalidated on 11 December 2008. New member by-elected. |
| 29 April 2009 | Deokjin, Jeonju, North Jeolla Province | Kim Se-ung | Democratic | Chung Dong-young | | Independent | Incumbent's election invalidated on 24 December 2008. New member by-elected. |
| 29 April 2009 | Gyeongju, North Gyeongsang Province | Kim Il-yun | Independent (elected as Pro-Park) | Jung Soo-sung | | Independent | Incumbent's election invalidated on 24 December 2008. New member by-elected. |
| 28 October 2009 | Jangan, Suwon, Gyeonggi Province | Park Jong-hee | Grand National | Lee Chan-yeol | | Democratic | Incumbent lost seat on 10 September 2009. New member by-elected. |
| 28 October 2009 | Sangnok B, Ansan, Gyeonggi Province | Hong Jang-pyo | Grand National (elected as Pro-Park) | Kim Young-hwan | | Democratic | Incumbent's election invalidated on 23 July 2009. New member by-elected. |
| 28 October 2009 | Gangneung, Gangwon Province | Choi Wook-cheul | Independent | Kweon Seong-dong | | Grand National | Incumbent's election invalidated on 23 July 2009. New member by-elected. |
| 28 October 2009 | Jeungpyeong–Jincheon–Gwisan–Eumseong, North Chungcheong Province | Kim Jong-yull | Democratic | Jong Bum-goo | | Democratic | Incumbent lost seat on 24 September 2009. New member by-elected. |
| 28 October 2009 | Yangsan, South Gyeongsang Province | Heo Beom-do | Grand National | Park Hee-tae | | Grand National | Incumbent's election invalidated on 23 June 2009. New member by-elected. |
| 3 November 2009 | Proportional representation | Jeong Kuk-kyo | Democratic | Kim Jinai | | Democratic | Incumbent's election invalidated on 9 July 2009; replaced by the next member in the Democratic list. |
| 3 November 2009 | Proportional representation | Yang Jeong-lyea | Pro-Park | Kim Hye-seong | | Pro-Park | Incumbent's election invalidated on 14 May 2009; replaced by the next member in the Pro-Park list. |
| 3 November 2009 | Proportional representation | Suh Chung-won | Pro-Park | Yoon Sang-il | | Pro-Park | Incumbent's election invalidated on 14 May 2009; replaced by the next member in the Pro-Park list. |
| 3 November 2009 | Proportional representation | Kim Noh-sik | Pro-Park | Kim Chung | | Pro-Park | Incumbent's election invalidated on 14 May 2009; replaced by the next member in the Pro-Park list. |
| 16 July 2010 | Proportional representation | Chung Jin-suk | Grand National | Kim Sung-dong | | Grand National | Incumbent resigned on 16 July 2010 upon appointment as Senior Presidential Secretary for Political Affairs; replaced by the next member in the Grand National list. |
| 28 July 2010 | Eunpyeong B, Seoul | Moon Kook-hyun | Creative Korea | Lee Jae-oh | | Grand National | Incumbent's election invalidated on 22 October 2009. New member by-elected. |
| 28 July 2010 | Gyeyang B, Incheon | Song Young-gil | Democratic | Lee Sang-kwon | | Grand National | Incumbent resigned on 26 April 2010 to run in the 2010 Incheon mayoral election. New member by-elected. |
| 28 July 2010 | Nam, Gwangju | Kang Woon-tae | Independent | Chang Byoung-wan | | Democratic | Incumbent resigned on 7 May 2010 to run in the 2010 Gwangju mayoral election. New member by-elected. |
| 28 July 2010 | Wonju, Gangwon Province | Lee Ke-jin | Grand National | Park Woo-soon | | Democratic | Incumbent resigned on 30 April 2010 to run in the 2010 Gangwon Province gubernatorial election. New member by-elected. |
| 28 July 2010 | Taebaek–Yeongwol–Pyeongchang–Jeongseon, Gangwon Province | Lee Kwang-jae | Democratic | Choi Jong-won | | Grand National | Incumbent resigned on 28 April 2010 to run in the 2010 Gangwon Province gubernatorial election. New member by-elected. |
| 28 July 2010 | Cheolwon–Hwacheon–Yanggu–Inje, Gangwon Province | Lee Yong-sam | Democratic | Han Ki-ho | | Grand National | Incumbent died on 20 January 2010. New member by-elected. |
| 28 July 2010 | Cheonan B, South Chungcheong Province | Park Sang-don | Liberty Forward | Kim Ho-yeon | | Grand National | Incumbent resigned on 4 May 2010 to run in the 2010 South Chungcheong Province gubernatorial election. New member by-elected. |
| 28 July 2010 | Chungju, North Chungcheong Province | Lee Si-jong | Democratic | Yoon Jin-sik | | Grand National | Incumbent resigned on 12 April 2010 to run in the 2010 North Chungcheong Province gubernatorial election. New member by-elected. |
| 9 September 2010 | Proportional representation | Lim Doo-sung | Grand National | Choi Kyung-hee | | Grand National | Incumbent's election invalidated on 9 September 2010; replaced by the next member in the Grand National list. |
| 5 April 2011 | Proportional representation | Choi Moon-soon | Democratic | Kim Hak-jae | | Democratic | Incumbent resigned on 5 April 2011 to run in the 2011 Gangwon Province gubernatorial by-election; replaced by the next member in the Democratic list. |
| 27 April 2011 | Bundang B, Seongnam, Gyeonggi Province | Yim Tae-hee | Grand National | Sohn Hak-kyu | | Democratic | Incumbent resigned on 1 October 2010 upon appointment as Chief of Staff to the President. New member by-elected. |
| 27 April 2011 | Suncheon, South Jeolla Province | Suh Gab-won | Democratic | Kim Sun-dong | | Democratic Labor | Incumbent lost seat on 27 January 2011. No by-election held. |
| 27 April 2011 | Gimhae B, South Gyeongsang Province | Choi Chul-kook | Democratic | Kim Tae-ho | | Grand National | Incumbent lost seat on 10 December 2010. No by-election held. |
| 9 June 2011 | Gangnam B, Seoul | Gong Sung-jin | Grand National | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent's election invalidated on 9 June 2011. No by-election held. |
| 11 June 2011 | Nowon A, Seoul | Hyun Gyoung-byoung | Grand National | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent's election invalidated on 11 June 2011. No by-election held. |
| 4 August 2011 | Seongbuk B, Seoul | Kim Hyo-jae | Grand National | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent resigned on 4 August 2011 upon appointment as Senior Presidential Secretary for Political Affairs. No by-election held. |
| 28 September 2011 | Jung, Seoul | Na Kyung-won | Grand National | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent resigned on 28 September 2011 to run in the 2011 Seoul mayoral by-election. No by-election held. |
| 4 October 2011 | Proportional representation | Kim Kum-lae | Grand National | Lee Young-yea | | Grand National | Incumbent resigned on 4 October 2011 upon appointment as Minister of Gender Equality and Family; replaced by the next member in the Grand National list. |
| 25 January 2012 | Proportional representation | Yu Won-il | Creative Korea | Sun Kyung-sik | | Creative Korea | Incumbent resigned on 25 January 2012; replaced by the next member in the Creative Korea list. |
| 13 March 2012 | Proportional representation | Kim Choong-joh | Democratic United | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent lost seat on 13 March 2012. |
| 15 March 2012 | Dongdaemun A, Seoul | Jang Kwang-keun | Saenuri | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent's election invalidated on 15 March 2012. No by-election held. |
| 11 May 2012 | Uijeongbu B, Gyeonggi Province | Kang Sung-jong | Democratic United | Seat remained vacant | Seat remained vacant | Seat remained vacant | Incumbent lost seat on 11 May 2012. No by-election held. |