| Competition: | K3 League Advanced |
| Season: | 2017 |
| Dates: | 25 February – 14 October 2017 |
| Winners: | FC Pocheon (6th title) |
| Best Player: | Park Jung-soo[1] |
| League Topscorer: | Kim Woon |
| Best Goalkeeper: | Park Jun-hyuk |
| Matches: | 132 |
| Total Goals: | 352 |
| Prevseason: | 2016 |
| Nextseason: | 2018 |
The 2017 K3 League Advanced was the eleventh season of amateur K3 League.
| Club | City | Stadium | Manager | |
|---|---|---|---|---|
| Cheongju City | Cheongju | Heungdeok Football Park |  Seo Won-sang | |
| Chungbuk Cheongju | Cheongju | Cheongju Stadium | Kim Jong-hyun | |
| Chuncheon FC | Chuncheon | Chuncheon Stadium | Kim Yong-ho | |
| Gimpo Citizen | Gimpo | Gimpo City Stadium | Yoo Jong-wan | |
| Gyeongju Citizen | Gyeongju | Gyeongju Civic Stadium | Kim Jin-hyung | |
| Hwaseong FC | Hwaseong | Hwaseong Stadium | Kim Jong-boo | |
| Icheon Citizen | Icheon | Icheon City Stadium | Lee Hyun-chang | |
| Jeonju FC | Jeonju | Jeonju University ground | Yang Young-cheol | |
| Paju Citizen | Paju | Paju Public Stadium | Oh Won-jae | |
| FC Pocheon | Pocheon | Pocheon Stadium | In Chang-soo | |
| Yangju Citizen | Yangju | Yangju Stadium | Lee Seung-hee | |
| Yangpyeong FC | Yangpyeong | Yangpyeong Stadium | Cha Seung-yong |
When the first round and semi-final matches were finished as draws, their winners were decided on the regular season rankings without extra time and the penalty shoot-out.
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----FC Pocheon won 2–1 on aggregate.