The league will run in a single table format with 19 clubs each playing each other once, with teams playing reverse fixtures from the 2022 season (if a team faced an opponent at home in 2022, they will face them on the road in 2023). With the league set to split into a multi-division format with promotion-relegation beginning in 2024, the points obtained in this season will contribute to the original placement of clubs in 2024, with the points from the 2022 season (weighted at 75%) being added to the points teams obtain in the 2023 season (weighted at 100%) to determine the placements.[1]
The top-six teams in the regular season will qualify for the playoffs with the top-two teams receiving first round byes.
Clubs
With the exception of Pickering FC, 19 of the 20 clubs that took part in the 2022 season will participate in 2023.[2] Because of the format changes planned for the following year, the league imposed a one-year moratorium on any new teams joining the league.[1][3]
Source: League1 Ontario Rules for classification: 1) points; 2) total wins; 3) goal differential; 4) goals for; 5) away goals differential; 6) away goals for; 7) home goals differential; 8) home goals for; 9) head-to-head record; 10) coin toss or drawing of lots.[4] (C) Champions
Playoffs
The top two seeds will earn a bye directly to the second round. After the first round, the teams will be re-seeded with NDC Ontario (the regular season champion) playing the lowest ranked remaining seed.
Starting in 2024, the league will split into a multi-division format with promotion and relegation between them. Ten teams will take part in the first-tier League1 Premier, ten teams in the second-tier League1 Championship, and all new expansion teams as well as reserve sides in a third-tier League2 Ontario.
The initial assignment of teams in the 2024 season is done by using the points obtained in the previous two years. The points from the 2022 season (weighted at 75%) will be added to the points teams obtain in the 2023 season (weighted at 100%) to determine the placements.[1]
Source: [citation needed] (Z) L1O license for 2024 revoked Notes:
^St. Catharines Roma Wolves initially qualified for the League1 Championship. However, they were later promoted to the Premier Division to replace Electric City, upon their folding. However, they later chose to self-relegate to League2 Ontario
^Blue Devils FC initially qualified for the League1 Championship. However, they were later promoted to the Premier Division to replace St. Catherines Roma, upon their decision to self-relegate to League2 Ontario.
^ abDarby and Unionville-Milliken did not play their match against each other in 2022.
^Pickering FC did not compete in the 2023 season. Their L1O license for 2024 was revoked. However, they later purchased a new license to enter the L1O-C for 2024.
Reserve Division
The Open Age Reserve Division will return with each Premier Division club fielding one or more teams, as well as some other OPDL clubs that do not operate a League1 Ontario team.