|Number of teams||12|
|Level on pyramid||2|
|Promotion to||NIFL Premiership|
|Relegation to||NIFL Premier Intermediate League|
|Domestic cup(s)||Irish Cup|
|League cup(s)||Northern Ireland League Cup|
|Current champions||Warrenpoint Town (2016–17)|
|2017–18 NIFL Championship|
It was founded in 2008 as the Premier Intermediate League for members of the previous IFA Intermediate League that met the new stricter membership criteria, though was marketed as the IFA Championship. In 2009, it was extended to two divisions: Championship 1 and Championship 2 with promotion and relegation between the two. In 2013, the Championship and IFA Premiership were replaced by a single Northern Ireland Football League, independent of the Irish Football Association (IFA).
Under reforms agreed by the NIFL clubs in 2014, from 2016-17, Championship 1 acquired senior status, continuing as the NIFL Championship, while Championship 2 continued as the Premier Intermediate League, retaining its intermediate status.
Current NIFL Championship clubs (2017–18)
|Ballyclare Comrades||Ballyclare||Dixon Park||1,800 (500 seated)|
|Harland & Wolff Welders||Belfast||Tillysburn Park||3,000 (500 seated)|
|Limavady United||Limavady||Limavady Showgrounds||1,000|
|Loughgall||Loughgall||Lakeview Park||3,000 (250 Seated)|
|Lurgan Celtic||Lurgan||Knockramer Park||1,000|
|Newry City||Newry||Newry Showgrounds||2,275 (1,080 Seated)|
- NIFL Premiership
- NIFL Premier Intermediate League
- IFA Interim Intermediate League
- IFA Reserve League
- IFA Intermediate Cup
- George Wilson Cup
- Irish Cup
- Irish League Cup
- County Antrim Shield
- Steel & Sons Cup
- Mid-Ulster Cup
- Bob Radcliffe Cup
- North West Senior Cup
- Craig Memorial Cup
- Northern Ireland football league system
- "Premier Intermediate League (PIL)". Irish Football Association. irishfa.com. Retrieved 7 January 2015.
- "IFA Championship". Irish Football Association. irishfa.com. Retrieved 7 January 2015.
- Ladbrokes.com Championship 2009/10
- Northern Ireland Football League (2014). NI Football League Restructure Proposal.
- "Championship 2016/2017 - Venues". Scoresway. Retrieved 20 November 2016.
- Malcolm Brodie (ed.), Northern Ireland Soccer Yearbook (various editions)