| Competition: | K3 League |
| Season: | 2022 |
| Dates: | 26 February – 29 October 2022 |
| Winners: | Changwon City (1st title) |
| Promoted: | Cheonan City Cheongju FC |
| Relegated: | Dangjin Citizen |
| Matches: | 240 |
| Total Goals: | 546 |
| Best Player: | Luan Costa[1] |
| League Topscorer: | Shin Young-jun (16 goals) |
| Prevseason: | 2021 |
| Nextseason: | 2023 |
The 2022 K3 League was the third season of the K3 League as a semi-professional league. Its regular season was held from 26 February to 29 October 2022.[2]
Defending champions Gimpo FC became a professional club and joined the K League. Cheonan City and Cheongju FC are also going to be join the K League in the next year.[3]
The 16 participating teams played each other twice, and the bottom team advanced to the relegation play-off. The K3 League Championship which had been held in play-off format to decide champions before was not held since this year.
Promoted from K4 League
Promoted to K League 2
Relegated to K4 League
| Club | City | Stadium | Capacity | |
|---|---|---|---|---|
| Busan Transportation Corporation | Busan | Busan Gudeok Stadium | 24,363 | |
| Changwon City | Changwon | Changwon Football Center | 15,116 | |
| Cheonan City | Cheonan | Cheonan Football Center | 15,500 | |
| Cheongju FC | Cheongju | Cheongju Stadium | 17,264 | |
| Daejeon Korail | Daejeon | Daejeon World Cup Stadium Practice Pitch | 17,371 | |
| Dangjin Citizen | Dangjin | Dangjin Sports Complex | 11,718 | |
| Gangneung Citizen | Gangneung | Gangneung Stadium | 33,000 | |
| Gimhae FC | Gimhae | Gimhae Public Stadium | 25,000 | |
| Gyeongju KHNP | Gyeongju | Gyeongju Civic Stadium | 12,199 | |
| Hwaseong FC | Hwaseong | Hwaseong Stadium | 35,270 | |
| FC Mokpo | Mokpo | Mokpo International Football Center | 5,952 | |
| Paju Citizen | Paju | Paju Public Stadium | 23,000 | |
| Pocheon Citizen | Pocheon | Pocheon Stadium | 7,000 | |
| Siheung Citizen | Siheung | Jeongwang Sports Park | 1,500 | |
| Ulsan Citizen | Ulsan | Ulsan Stadium | 19,471 | |
| Yangju Citizen | Yangju | Godeok Artificial Turf Ground | 5,000 |
| Club | Manager | |
|---|---|---|
| Busan Transportation Corporation |  Kim Gwi-hwa | |
| Changwon City | Choi Kyeong-don | |
| Cheonan City | Kim Tae-young | |
| Cheongju FC | Choi Sang-hyeon | |
| Daejeon Korail | Kim Seung-hee | |
| Dangjin Citizen | Han Sang-min | |
| Gangneung Citizen | Kim Do-keun | |
| Gimhae FC | Yoon Sung-hyo | |
| Gyeongju KHNP | Seo Bo-won | |
| Hwaseong FC | Kang Chul | |
| FC Mokpo | Jeong Hyun-ho | |
| Paju Citizen | Lee Eun-no | |
| Pocheon Citizen | Cho Man-geun | |
| Siheung Citizen | Park Seung-soo | |
| Ulsan Citizen | Yoon Kyung-sang | |
| Yangju Citizen | Park Sung-bae |
| Club | Player 1 | Player 2 | Player 3 | AFC player | Former players | |
|---|---|---|---|---|---|---|
| Changwon City |  Luan Costa | |||||
| Cheonan City | Bruno Mota | Juliano | Rodolfo | |||
| Cheongju FC | Denilson | Ruster Santos | Yan Victor | |||
| Gangneung Citizen | Cristian | Júnior Batista | ||||
| Hwaseong FC | Carlinhos | Julen Sandy | ||||
| Gimhae FC |  Masato Shimokawa |  Marko Rajkovic | ||||
| Paju Citizen | Samuel Pungi | Bruno Kairon | Matheus Medeiros | |||
| Ulsan Citizen | Paul Puk Kun Pal | |||||
| Yangju Citizen | Danyllo |
The relegation play-off (K4 League promotion play-offs final) was contested between the bottom team of K3 League and the winners of K4 League play-off (semi-final).
| Rank | Player[4] | Club | Goals | |
|---|---|---|---|---|
| 1 | Shin Young-jun | Busan Transportation Corporation | 16 | |
| 2 | Seo Dong-hyeok | Gyeongju KHNP | 14 | |
| 3 | Kim Yeong-jun | Pocheon Citizen | 12 | |
| Luan Costa | Changwon City | |||
| 5 | Marko Rajkovic | Gimhae FC | 10 |