| Kaloyan Kostadinov | |
| Fullname: | Kaloyan Kalinov Kostadinov |
| Birth Date: | 18 July 2002 |
| Birth Place: | Gorna Oryahovitsa, Bulgaria |
| Height: | 184 cm |
| Position: | Midfielder |
| Currentclub: | Stabæk |
| Clubnumber: | 24 |
| Youthyears1: | –2019 |
| Youthclubs1: | Sandnes Ulf |
| Years1: | 2019–2020 |
| Clubs1: | Sandnes Ulf |
| Caps1: | 5 |
| Goals1: | 0 |
| Years2: | 2020– |
| Clubs2: | Stabæk |
| Caps2: | 71 |
| Goals2: | 2 |
| Nationalyears1: | 2019 |
| Nationalteam1: | Norway U17 |
| Nationalcaps1: | 6 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2020 |
| Nationalteam2: | Norway U18 |
| Nationalcaps2: | 3 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 2021– |
| Nationalteam3: | Norway U20 |
| Nationalcaps3: | 2 |
| Nationalgoals3: | 0 |
| Pcupdate: | 14 November 2024 |
| Ntupdate: | 18:08, 18 January 2022 (UTC) |
Kaloyan "Kay" Kalinov Kostadinov (bg|Калоян Калинов Костадинов; born 18 July 2002) is a Bulgarian football midfielder who plays for Stabæk.
Coming through the youth system of Sandnes Ulf, he made his senior debut in the 2019 Norwegian Football Cup against Vard. He made his league debut in July 2019 against Notodden. This year he also made his debut for a Norwegian youth national team. At the end of the 2019–20 winter transfer window he agreed to a transfer to first-tier Stabæk. Albeit the transfer would happen in August 2020,[1] he did not play any Sandnes Ulf games in 2020 and instead made his Stabæk debut in September 2020 against Odd.
Kostadinov was born in Bulgaria to Bulgarian parents but moved to Norway in 2011, which makes him eligible for both Norway and Bulgaria national teams. He represented U17 and U18 teams of Norway.