| Competition: | Segunda División |
| Season: | 2021–22 |
| Dates: | 13 August 2021 – 19 June 2022 |
| Winners: | Almería 1st title |
| Promoted: | Almería Valladolid Girona |
| Relegated: | Amorebieta Real Sociedad B Fuenlabrada Alcorcón |
| Matches: | 462 |
| Total Goals: | 1122 |
| League Topscorer: | Borja Bastón Cristhian Stuani (22 goals each) |
| Biggest Home Win: | |
| Biggest Away Win: | |
| Highest Scoring: | |
| Longest Wins: | Almería |
| Longest Unbeaten: | Zaragoza |
| Longest Winless: | Alcorcón |
| Longest Losses: | Fuenlabrada |
| Highest Attendance: | 30063 |
| Lowest Attendance: | 592 |
| Prevseason: | 2020–21 |
| Nextseason: | 2022–23 |
The 2021–22 Segunda División (known as LaLiga SmartBank for sponsorship reasons) football season,[1] was the 91st since its establishment in Spain.
A total of 22 teams will contest the league, including 15 sides from the 2020–21 season, three relegated from the 2020–21 La Liga, and four promoted from the 2020–21 Segunda División B. This will include the winners of the play-offs.
On 8 May 2021, Espanyol became the first side to mathematically be promoted, assured of a return to the top flight following a 0–0 draw against Zaragoza.[2] The second team to earn promotion was Mallorca, following Almería's 2–3 loss to Cartagena on 18 May 2021. Both teams made an immediate return to the first division after a season away. The final team promoted to La Liga was Rayo Vallecano by beating CD Leganés 5-1 and Girona FC 3–2 on aggration in promotion play-off.
The first team to be relegated from La Liga were Eibar, after a 1–4 loss to Valencia on 16 May 2021, ending their seven-year stay in the top tier. The second team to be relegated were Valladolid, following a 1–2 home defeat against Atlético Madrid on 22 May 2021, in their final game of the season, ending their three-year stay in the top tier. The third and final team to be relegated were Huesca, after drawing 0–0 against Valencia on 22 May 2021 in their final game of the season, suffering an immediate return to the second division.
The first team to be relegated from Segunda División were Albacete, following a 1–1 against Lugo on 18 May 2021, effectively ending their four-years stay in the second tier. Albacete was followed by Castellón, Logroñés and Sabadell. The three of those clubs were relegated on 30 May 2021, making an immediate return to the third tier after a single season in Segunda División.
Following the play-offs, the first team to achieve promotion were Real Sociedad B after defeated Algeciras on 22 May 2021. They are promoted to second division for the first time in 59 years. The second team to earn promotion were Amorebieta on 22 May 2021 after beating Badajoz. The third team to earn promotion were Ibiza on 23 May 2021 after defeated UCAM Murcia. For both victorious teams this was their first time ever promotion to the second division. The fourth and last team to get the promotion was Burgos after defeating Athletic Bilbao B on 23 May 2021. This was their 2nd promotion to the Segunda División, the last one being in 2001–02, where they ended being relegated.
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| [3] | ||||
| [4] | ||||
| Lezama (field 2) | ||||
| [5] | ||||
| [6] | ||||
| Eibar | Eibar | Ipurua | [7] | |
| align=center | [8] | |||
| [9] | ||||
| [10] | ||||
| [11] | ||||
| [12] | ||||
| Leganés | Leganés | Butarque | [13] | |
| [14] | ||||
| [15] | ||||
| [16] | ||||
| [17] | ||||
| [18] | ||||
| [19] | ||||
| [20] | ||||
| [21] | ||||
| Valladolid | Valladolid | José Zorrilla | [22] | |
| [23] | ||||