2017–18 Segunda División
| Season | 2017–18 |
|---|---|
| Dates | 18 August 2017 – 2 June 2018 (regular season) |
| Champions | Rayo Vallecano |
| Promoted | Rayo Vallecano Huesca Valladolid |
| Relegated | Cultural Leonesa Barcelona B Lorca FC Sevilla Atlético |
| Matches played | 468 |
| Goals scored | 1,083 (2.31 per match) |
| Top goalscorer | Jaime Mata (33 goals) |
| Biggest home win | Córdoba 5–0 Reus (20 December 2017) |
| Biggest away win | Gimnàstic 0–4 Sporting Gijón (2 September 2017) Córdoba 1–5 Gimnàstic (15 October 2017) Lorca FC 1–5 Valladolid (19 May 2018) |
| Highest scoring | Cultural Leonesa 4–4 Valladolid (10 September 2017) Gimnàstic 5–3 Cultural Leonesa (19 May 2018) |
| Longest winning run | Sporting Gijón (8 matches) |
| Longest unbeaten run | Osasuna Sporting Gijón (12 matches) |
| Longest winless run | Lorca FC (16 matches) |
| Longest losing run | Lorca FC (10 matches) |
| Highest attendance | 29,741 Zaragoza 1–2 Numancia (9 June 2018) |
| Lowest attendance | 409 Sevilla Atlético 1–2 Albacete (16 March 2018) |
| Attendance | 4,104,401 (8,770 per match) |
← 2016–17 2018–19 → | |
The 2017–18 Segunda División season, also known as LaLiga 1|2|3 for sponsorship reasons, was the 87th season of the Spanish football second division since its establishment.