FC Seoul (Korean: FC 서울) is a South Korean professional football club based in Seoul, South Korea, that plays in the K-League. It is currently owned by GS Sports, a subsidiary of GS Group.

Founded as Lucky-Goldstar FC in 1983, FC Seoul have won 4 League titles, 2 League Cups and 1 FA Cup. FC Seoul is one of the most successful and the most popular club in the K-League, with financial backing from the GS Group.

FC Seoul are the reigning K-League and K-League Cup winners, and thus, in 2010, completed their first Double in club history.

The club is currently managed by FC Seoul legend Choi Yong-Soo.

FC Seoul was founded on 22 December 1983, and started out in 1984 as Lucky-Goldstar Football Club, owned and financially supported by the Lucky-Goldstar Group (now LG Group), with the Chungcheong region as its franchise and Hwangso (meaning bull) as its mascot.

In order to launch the professional football club, Lucky-Goldstar Group had a preparation period from 1982 and demanded that original franchise should be Seoul. In the 1984 season, the club finished seventh out of the eight clubs. The club fared better in the 1985 season when they won the Championship with the help of Thailand national football team player Piyapong Pue-On, who was the top scorer, as well as the top assistor.

Seoul (Korean pronunciation: [sʌ.ul] ( listen), English /soʊl/), officially the Seoul Special City, is the capital and largest metropolis of South Korea. A megacity with a population of over 10 million, it is the largest city proper in the OECD developed world. The Seoul National Capital Area is the world's second largest metropolitan area with over 25 million inhabitants, which includes the surrounding Incheon metropolis and Gyeonggi province. Almost a quarter of South Koreans live in Seoul, half of South Koreans live in the metropolitan area, along with over 275,000 international residents.

Located in the Han River, Seoul has been a major settlement for over 2,000 years, with its foundation dating back to 18 B.C. when Baekje, one of the Three Kingdoms of Korea, established its capital in what is now south-east Seoul. It continued as the capital of Korea during the Joseon Dynasty and the Korean Empire. The Seoul National Capital Area is home to four UNESCO World Heritage Sites: Changdeokgung, Hwaseong Fortress, Jongmyo Shrine and the Royal Tombs of the Joseon Dynasty.

Osmar Barba Ibáñez (born 5 June 1988 in Santoña, Cantabria), simply Osmar, is a Spanish footballer who plays for Racing de Santander as a central defender.

After one year on loan with CD Salmantino, Osmar returned to Racing de Santander, making his senior debuts with the reserves, in Segunda División B, being relegated in his second year.

On 8 November 2009, he made his debut with the Cantabrians' first-team, starting in a 0–2 La Liga home loss against Athletic Bilbao; he was definitely promoted to the main squad for the 2010–11 season.