|Full name||Stanislav Yordanov Kostov|
|Date of birth||2 October 1991|
|Place of birth||Blagoevgrad, Bulgaria|
|Height||1.81 m (5 ft 11 1⁄2 in)|
|2014–2016||Beroe Stara Zagora||42||(4)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 15 December 2016.
Born in Blagoevgrad, Kostov began his career at Pirin 2001 as an important part of their youth team. In January 2010 he was scouted by Pirin Blagoevgrad. Kostov made his first-team debut in the 2010–11 season as a substitute against Sliven 2000 in a 2–1 A PFG win on 7 August 2010. Kostov netted his first goal, as he scored the winning strike in a 2–1 home victory over Lokomotiv Sofia on 11 September. In the game, he also assisted Boris Kondev for the first goal and won the Man of the Match award. On 25 September 2010, in a home match versus Minyor Pernik, Stanislav scored the only goal for Pirin in a 1–1 draw. On 16 October he assisted Boris Kondev for the opening goal in a match against Levski Sofia, but Pirin went on to lose the game 4–1.
After a good first half of the season with Pirin, Kostov caught the eye of the major Bulgarian clubs CSKA Sofia and Levski Sofia. After a tough transfer battle for the youngster, Kostov finally decided to sign with CSKA. He made 21 appearances for CSKA, scoring 3 goals.
On 22 June 2012, Botev Plovdiv signed Kostov on a season-long loan deal, with the option of making the move permanent. On 10 August, Botev exercised the option to buy 100% of Kostov's contract. He signed a two-year contract. The following day, Kostov made his debut in a 3–0 win over Slavia Sofia, coming on as a substitute for Vander. His first goals came on 24 November, in a 6–1 home win over FC Eurocollege in the Bulgarian Cup, scoring a hat-trick.
- As of 8 January 2014
- "Ботев Пд взе Станислав Костов от ЦСКА" (in Bulgarian). gong.bg. Retrieved 2012-06-22.
- "Ботев откупи правата на Станислав Костов от ЦСКА" (in Bulgarian). novsport.com. Retrieved 2012-08-10.
- "Станислав Костов: избрах Берое заради треньора и града" (in Bulgarian). sportal.bg. 8 February 2014. Retrieved 4 May 2016.
- Profile at Footballdatabase.eu