Segona Catalana

The league comprises 146 teams (Group 1-A, 1-B and 8-A with 12 teams each, Groups 2, 3 and 4 with 15 teams each, Group 5 and 6 with 16 teams each, and Group 7-A, 7-B and 8-B with 11 teams each). Over the course of a season, which runs annually from September to the following June, each team plays twice against the others in the league, once at 'home' and once 'away'. Three points are awarded for a win, one for a draw and zero for a loss. The teams are ranked in the league table by points gained. In the event that two or more teams finish the season equal in all these respects, teams are separated by head-to-head points, then head-to-head goal difference, then head-to-head goals scored, then goal difference and then goals scored.

At the end of the season, the first three teams of the Groups 1-A and 1-B, 7-A and 7-B and 8-A and 8-B are qualified to a play-off phase in each province, while the top two teams of the Groups 2, 3, 4, 5 and 6 are automatically promoted to Primera Catalana. In the groups 2, 3, 4, 5 and 6, the 13th and below are relegated to Tercera Catalana, while the 12th is qualified to the relegation play-off.

The following 128 clubs are competing in the Segona Catalana during the 2021–22 season.