#1
You and I 그대 그리고 나
66.9%
MBC aired this 58-episode weekend drama from October 11, 1997 to April 26, 1998. Its final episode drew a 66.9% household rating, the highest single-episode figure for any Korean drama in the compilation, and the series averaged 43.7% across its run.21
Choi Jin-sil (최진실) and Park Sang-won (박상원) led the cast.2
KBS2 aired the 66-episode weekend drama from September 7, 1996 to April 20, 1997. Its final broadcast reached 65.8%, and the series averaged 52.6% over its whole run.3
It starred Choi Soo-jong (최수종), Lee Seung-yeon (이승연) and Bae Yong-joon (배용준). After Bae's later drama Winter Sonata made him popular in Japan, NHK aired First Love there in 2005.3
#3
What Is Love 사랑이 뭐길래
64.9%
MBC's weekend family drama premiered on November 23, 1991 and ended on May 31, 1992.181 DramaWiki's ratings list dates its 64.9% peak to May 24, 1992, a week before the finale.7
MBC's own classic-drama channel bills it as the Korean drama with the highest average rating of all time. Choi Min-soo (최민수) starred.1819
SBS aired the 24-episode series from January 9 to February 16, 1995. Written by Song Ji-na (송지나) and directed by Kim Jong-hak (김종학), it follows three friends through the political oppression of 1970s and 1980s Korea, and its reenactment of the 1980 Gwangju Uprising mixes in archival footage.5
Lee Jung-jae (이정재), later the lead of Squid Game, played the heroine's silent bodyguard, in what was meant to be a small supporting role.20
MBC's 64-episode period drama about the Joseon-era doctor Heo Jun ran from November 22, 1999 to June 27, 2000, with Jun Kwang-ryul (전광렬) in the title role. Its director, Lee Byung-hoon (이병훈), went on to make Dae Jang Geum (#10).21
Reported peaks differ: the compilation lists 63.5%, a WikiTree ranking of period dramas gives 63.7%, and the drama's Wikipedia article rounds it to 64%.1621
#6
A Sunny Place of the Young 젊은이의 양지
62.7%
KBS2 aired the 56-episode drama from May 6 to November 12, 1995, and its finale on November 12 drew the 62.7% peak.227
Its climb was quick. A report on November 9, 1995 said it first passed 40% in the third week of September and reached 52.2% on November 4.23
#7
Sons and Daughters 아들과 딸
61.1%
MBC's 64-episode weekend drama ran from October 3, 1992 to May 9, 1993. It follows a son and daughter, fraternal twins, in a family that favours sons, and starred Choi Soo-jong and Kim Hee-ae (김희애).8
Its 49.1% average across the run is the second-highest average for a Korean drama, according to Xportsnews.24
#8
Taejo Wang Geon 태조 왕건
60.2%
KBS1's 200-episode period drama ran from April 1, 2000 to February 24, 2002, with Choi Soo-jong in the title role of King Taejo of Goryeo.25
Choi starred in five of the 16 dramas on this list: First Love, Sons and Daughters, Taejo Wang Geon, Jealousy and Blowing of the Wind.26
#9
Eyes of Dawn 여명의 눈동자
58.4%
MBC aired the series from October 7, 1991 to February 6, 1992, with Chae Shi-ra (채시라) and Park Sang-won in the leads. With a ₩7.2 billion budget, shoots in China and the Philippines, more than 270 actors and 21,000 extras, it was one of the first Korean dramas filmed in full before broadcast.27
Director Kim Jong-hak and writer Song Ji-na made Sandglass (#4) next.275 Park Sang-won was in four of the top nine: Eyes of Dawn, Sandglass, First Love and You and I.28
#10
Dae Jang Geum 대장금
57.8%
Also known as Jewel in the Palace, MBC's 54-episode period drama ran from September 15, 2003 to March 23, 2004. Lee Young-ae (이영애) played Jang-geum, an orphaned palace kitchen cook who becomes the king's first female physician.29
Reports of its peak differ. The compilation and MBC's own channel give 57.8%, its Wikipedia article gives 57.1%, and a March 2004 report citing Nielsen Media Research gave 56.8%, which would place it #11.1112930