The International Rugby League (IRL) was founded in its current form in 1998, consisting of 10 full members. The federation currently consists of 35 members (15 full and 20 affiliate), and 24 observer members.
Full Members
{| class="wikitable sortable" style="margin: 1em auto 1em auto"
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! Nation
! Governing body
! Membership details
! Ref.
|-
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| Australian Rugby League Commission
| Founding Member: 1998–present
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| Cook Islands Rugby League
| Founding Member: 1998–present
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| Rugby Football League
| Founding Member: 1998–present
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| Fiji National Rugby League
| Founding Member: 1998–present
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|-
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| French Rugby League Federation
| Founding Member: 1998–present
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|-
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| Rugby League Federation Ghana
| Full Member: 2025–present<br/>Affiliate Member: 2020–2025<br/>Observer: 2014–2020
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|-
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| Jamaica Rugby League Association
| Full Member: 2013–present<br/>Affiliate: 2011–2013<br/>Observer: ????–2011
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|-
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| Ukrainian Federation of Rugby League
| Full Member: 2013–present<br/>Affiliate: ????–2013<br/>Observer: ????–????
|
|}
Affiliate Members
{| class="wikitable sortable" style="margin: 1em auto 1em auto"
|-
! Nation
! Governing body
! Membership details
! Ref.
|-
|
|
| Affiliate Member: 2019–present<br/>Observer: ????–2019
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|-
|
| Cameroon Rugby League XIII
| Affiliate Member: 2021–present<br/>Observer: 2017–2021
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|-
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| Canada Rugby League
| Affiliate Member: 2013–present<br/>Observer: 2010–2013
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|-
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| Czech Rugby League Association
| Affiliate Member: 2011–present<br/>Observer: 2006–2011
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|-
| rowspan="2"|
| Rugby League Deutschland
| Affiliate Member: ????–2014<br/>Observer: 2006–????; 2014–2015
| rowspan="2"|
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| Nationaler Rugby League Deutschland
| Affiliate Member: 2017–present
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| Greek Rugby League Association
| Affiliate Member: 2018–present<br/>Observer: 2017–2018
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|-
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| Rugby League Ireland
| Affiliate Member: 2000–2010; 2024–present<br/>Full Member: 2010–2024<br/>Observer: ????–????
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| Kenya Rugby League Federation
| Affiliate Member: 2022–present<br/>Observer: ????–2022
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| Lebanese Rugby League Federation
| Affiliate Member: ????–2012; 2024–present<br/>Full Member: 2012–2024<br/>Observer: ????–????
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| Netherlandse Rugby League Bond
| Affiliate Member: 2017–present<br/>Observer: 2012–2017
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| Nigeria Rugby League
| Affiliate Member: 2020–present<br/>Observer: 2014–2020
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|-
| rowspan="2"|
| American National Rugby League
| Affiliate Member: ????–2015<br/>Observer: ????–????
| rowspan="2"|
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| USA Rugby League
| Affiliate Member: 2015–present
|}
Observer Members
{| class="wikitable sortable" style="margin: 1em auto 1em auto"
|-
! Nation
! Governing body
! Membership details
! Ref.
|-
|
| Albanian Rugby League
| Observer Member: 2018–present
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|-
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| Argentina Rugby League
| Observer Member: 2024–present
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| Asocijacija Ragbi 13 Bosnia-Hercegovina
| Observer Member: 2018–present
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| Bulgarian Rugby League Federation
| Observer Member: 2017–present
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| Burundi Rugby League
| Observer Member: 2016–present
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| Federacion de Rugby Futbol League 13
| Observer Member: ????–2018; 2025–Present<br/>Affiliate: 2018–2025
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| Colombia Rugby League XIII
| Observer Member: ????–present
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| DR Congo Rugby League XIII
| Observer Member: 2015–present
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| Georgia Rugby League
| Observer Member: ????–present
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| Hungarian Rugby League Federation
| Observer Member: 2013–present
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| Japanese Rugby League Association
| Observer Member: 2021–present
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| Libya Rugby League Association
| Observer Member: 2019–present
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| Fédération Marocaine de Rugby League
| Observer Member: ????–2021; 2025–Present<br/>Affiliate Member: 2021–2025
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| Palestine Rugby League
| Observer Member: 2014–present
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| Philippines National Rugby League
| Observer Member: 2021–present
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| Polska Rugby XIII
| Observer Member: 2017–present
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| Sierra Leone Rugby League Federation
| Observer Member: 2014–present
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| Denmark Rugby League Federation
| Observer member: 2011–2024
|