The 2019 China League One () was the 16th season of the China League One, the second tier of the Chinese football league pyramid, since its establishment in 2004. The league's title sponsor was the e-commerce website 58.com.
The season began on 9 March and concluded on 2 November.
Policy regarding foreign players and U-23 domestic players was modified in this season. The same as the previous two seasons, at least one domestic player who is under the age of 23 (born on or after 1 January 1996) must be in the starting eleven. However, the total number of foreign players appearing in matches is no longer related to the total number of U-23 domestic players. A club can register three foreign players at most in the same time and use two foreign players at most in a match. On the other hand, at least two U-23 domestic players must be used in a match. In addition, if there are U23 players who have been called up by the national teams at all levels, the number of U-23 domestic players fielded will be reduced accordingly.
In order to expand the number of teams from 16 to 18 in 2020 season, this season will only directly relegate 1 team instead of 2 teams while 2 teams will enter relegation playoffs.
Teams relegated from 2018 Chinese Super League
Teams promoted from 2018 China League Two
Teams promoted to 2019 Chinese Super League
Team relegated to 2019 China League Two
Team dissolved
A total of four foreign players can be registered in a season and the number of foreign players is limited to three per CL1 team in the same time. Maximum of two foreign players can be fielded in one match.
Players name in bold indicates the player is registered during the mid-season transfer window.
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The awards of 2019 China League One were announced on 20 November 2011.