| Sejm Constituency no. 4 Bydgoszcz | |
| Nativename: | Polish: Okręg wyborczy nr 4<br/>Bydgoszcz |
| Parl Name: | Sejm |
| District Label: | Counties |
| District: | Bydgoszcz (city county), Bydgoszcz (land county), Inowrocław, Mogilno, Nakło, Sępólno, Świecie, Tuchola, Żnin |
| Region Label: | Voivodeship |
| Region: | Kuyavian-Pomeranian |
| Population: | 984,022 (June 2023)[1] |
| Electorate: | 745,557 (2023)[2] |
| Area: | 8916.15km (5,540.24miles) |
| Year: | 2001 |
| Members Label: | Deputies |
| Members: | 12 |
| Local Council Label: | Regional assembly |
| Local Council: | Kuyavian-Pomeranian Voivodeship Sejmik |
| Blank1 Name: | Senate constituencies |
| Blank1 Info: | 9, 10 |
| Blank2 Name: | EP constituency |
| Blank2 Info: | Kuyavian-Pomeranian |
Sejm Constituency no. 4 (pl|Okręg wyborczy nr 4) is a constituency of the Sejm in Kuyavian-Pomeranian Voivodeship electing twelve deputies. It consists of city county of Bydgoszcz (constituency's seat) and land counties of Bydgoszcz, Inowrocław, Mogilno, Nakło, Sępólno, Świecie, Tuchola and Żnin.[3]
| Parliamentary group | |||
| Paweł Olszewski | |||
| Magdalena Łośko | |||
| Piotr Król | |||
| Łukasz Schreiber | |||
| Agnieszka Kłopotek | |||
| Krzysztof Gawkowski |