The2017 Liga 3 season was the 2nd season of lower-tier and the inaugural season of the third-tier competition inIndonesia with the new nameLiga 3.^[1]

Persatu Tuban, winner of the2014 Liga Nusantara are the defending champions, as the2015 Liga Nusantara was not held and the2016 ISC Liga Nusantara was not counted as an official league.

Blitar United won the title after a 2–1 win overPersik Kendal in2017 Liga 3 Final atGelora Bumi Kartini Stadium,Jepara on 17 December 2017.

National round took place in several provinces that have been determined by PTLiga Indonesia Baru with the following format:

• Play-off round contains 24 teams divided into eight groups. The winner from each group advanced to the National round.
• National round contains 32 teams divided into eight groups. Two teams from each group advanced to the knockout round.^[2]

Each Provincial Association held their Provincial League (Regional round) followed by unlimited teams and the winner advanced to National round or Play-off round. Each Provincial Association only given 1 to 4 representatives to the National round or Play-off round based on rate of their Provincial League competitiveness. Regional round start at 12 April 2017 inCentral Java Province.

#	Regional	Qualified teams
		National round	Play-off round
Sumatra Region
1	Aceh	Kuala Nanggroe[3]	Aceh United
2	North Sumatra	PSDS Deli Serdang[4]	PS Keluarga USU
3	West Sumatra	Batang Anai[5]	PES Pessel South Coast
4	Riau	Nabil[6]	—
5	Riau Islands	—	PS Bintan[7]
6	Jambi	—	Persijam Jambi[8]
7	South Sumatra	—	Persimura Musi Rawas[9]
8	Bangka Belitung Islands	PS Bangka Selection[10]	PS Beltim East Belitung
9	Bengkulu	—	PS Benteng Central Bengkulu
10	Lampung	Persilat Central Lampung[11]	SS Lampung
Java Region
11	Banten	—	Persitangsel South Tangerang[12]
12	Jakarta	Villa 2000 021 Jakarta	Bintang Kranggan
13	West Java	PSKC Cimahi Maung Anom	Patriot Candrabhaga
14	Central Java	Persik Kendal[13] Persis GR	—
15	Yogyakarta	Satria Adikarta[14]	Gama
16	East Java	Blitar United[15] Persibo Bojonegoro Deltras Sidoarjo Persekabpas Pasuruan	—
Kalimantan Region
17	West Kalimantan	—	Persibeng Bengkayang[16]
18	Central Kalimantan	—	Persegumas Gunung Mas[17]
19	South Kalimantan	Peseban Banjarmasin[18]	PS Balangan
20	East Kalimantan	PSAD Kodam VI/MLW Balikpapan[19]	—
21	North Kalimantan	Pelangi Intimung	—
Sulawesi Region
22	North Sulawesi	Persbit Bitung PS Bank Sulut	—
23	Central Sulawesi	—	Persipal Palu[20]
24	South Sulawesi	Sidrap United[21]	—
25	Southeast Sulawesi	—	—
26	Gorontalo	—	Persidago Gorontalo
27	West Sulawesi	—	PS Matra North Mamuju[22]
Lesser Sunda Islands Region
28	Bali	—	Persekaba Bali[23]
29	West Nusa Tenggara	—	PSKT West Sumbawa[24]
30	East Nusa Tenggara	Perse Ende[25]	—
Maluku and Papua Region
31	Maluku	—	Pelauw Putra[26]
32	North Maluku	—	Persiter Ternate[27]
33	West Papua	—	—
34	Papua	Persewar Waropen[28]	Persintan Intan Jaya

There are 24 teams entered this round divided into 8 groups and played on 28 November-1 December 2017. The winners from each group advanced to National round.^[29]

All matches were held inCitarum Stadium,Semarang.

All matches were held inCitarum Stadium,Semarang.

All matches were held inKebon Dalem Stadium,Kendal.

All matches were held inKebon Dalem Stadium,Kendal.

All matches were held inWergu Wetan Stadium,Kudus.

All matches were held inWergu Wetan Stadium,Kudus.

All matches were held inGelora Bumi Kartini Stadium,Jepara.

All matches were held inGelora Bumi Kartini Stadium,Jepara.

There are 24 teams (+8 teams from Play-off round) entered this round and played on 3–17 December 2017 atCentral Java.^[29]

All matches were held inCitarum Stadium,Semarang.

All matches were held inCitarum Stadium,Semarang.

All matches were held inKebon Dalem Stadium,Kendal.

All matches were held inKebon Dalem Stadium,Kendal.

All matches were held inWergu Wetan Stadium,Kudus.

All matches were held inWergu Wetan Stadium,Kudus.

All matches were held inGelora Bumi Kartini Stadium,Jepara.

All matches were held inGelora Bumi Kartini Stadium,Jepara.

• Best Player:Assanur Rijal (Aceh United)
• Top Scorer: Arianto (Aceh United)

• 2017 Liga 1
• 2017 Liga 2

• Third-tier Indonesian football league seasons
• 2017 in Indonesian football leagues
• 2017 in Asian association football leagues
• 2016–17 in Asian third-tier association football leagues

• CS1 maint: numeric names: authors list
• CS1 Indonesian-language sources (id)
• Use dmy dates from July 2017
• Articles with short description
• Short description matches Wikidata