| Alexander Siebeck | |
| Birth Date: | 1993 11, df=yes |
| Birth Place: | Leipzig, Germany |
| Height: | 1.83 m |
| Position: | Attacking midfielder |
| Currentclub: | 1. FC Lokomotive Leipzig |
| Youthyears1: | –2009 |
| Youthclubs1: | 1. FC Lokomotive Leipzig |
| Youthyears2: | 2009–2013 |
| Youthclubs2: | RB Leipzig |
| Years1: | 2013 |
| Clubs1: | RB Leipzig |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2013–2017 |
| Clubs2: | RB Leipzig II |
| Caps2: | 115 |
| Goals2: | 27 |
| Years3: | 2017–2019 |
| Clubs3: | Karlsruher SC |
| Caps3: | 8 |
| Goals3: | 0 |
| Years4: | 2018 |
| Clubs4: | → Energie Cottbus (loan) |
| Caps4: | 13 |
| Goals4: | 1 |
| Years5: | 2019 |
| Clubs5: | → Wiener Neustadt (loan) |
| Caps5: | 12 |
| Goals5: | 1 |
| Years6: | 2019–2020 |
| Clubs6: | Berliner AK 07 |
| Caps6: | 17 |
| Goals6: | 0 |
| Years7: | 2020 |
| Clubs7: | SV Babelsberg 03 |
| Caps7: | 5 |
| Goals7: | 0 |
| Years8: | 2020–2024 |
| Clubs8: | BFC Dynamo |
| Caps8: | 100 |
| Goals8: | 18 |
| Years9: | 2024– |
| Clubs9: | 1. FC Lokomotive Leipzig |
| Caps9: | 0 |
| Goals9: | 0 |
| Club-Update: | 15:59, 4 July 2024 (UTC) |
Alexander Siebeck (born 3 November 1993) is a German professional footballer who plays as an attacking midfielder for 1. FC Lokomotive Leipzig.