Listed below are the various Facebook groups that have been formed by, and for, fans of the McElroy family of products. They encompass a wide array of identities, locations, and interests.
- My Brother, My Brother and Me Appreciation Group - For fans of My Brother, My Brother and Me. 
- Sawbones Appreciation Group - For fans of Sawbones.
- Shmanners (Fanners) - For fans of Shmanners.
- The Adventure Zone Appreciation Group - For fans of The Adventure Zone.
- Wonderful! - For fans of Wonderful!, previously for Rose Buddies.
Local Groups (USA)
- McElroy Appreciation Group - Arizona - For McElroy fans in Arizona.
- MBMBAM & Floridian - For MBMBaM fans in Florida.
- MaxFun Atlanta Unofficial Community - For MaxFun fans in the Atlanta, Georgia area.
- Max Fun Louisiana - For MaxFun fans in Louisiana.
- MaxFun NYC - For MaxFun fans in the Greater New York City area.
- MaxFun WNY - For MaxFun fans in Western New York.
- Midwestish Good Good McElroy Appreciation Group - For McElroy fans in Minnesota, Wisconsin, etc.
- Cincinasty Max Funsters - For MaxFun fans in the Cincinnati, Ohio area.
- Columbus, Ohio MaxFunsters - For MaxFun fans in the Columbus, Ohio area.
- McElroy Oklahomies - For McElroy fans in Oklahoma.
- MaxFun Philly - For MaxFun fans in the Philadelphia, Pennsylvania area.
- The Adventure Zone: Tennessee Fans - For TAZ fans in Tennessee.
- Seattle Area Maximum Fun Appreciation Society - For MaxFun fans in the Seattle, Washington area.
- Zag on DC Meetup Group - For McElroy fans in the DC-Virginia-Maryland (DMV) area.
Local Groups (World)
- Good Good Canucks, Eh - For McElroy fans in Canada.
- Max Fun London - For MaxFun fans in the London, UK area.
- Max Fun UK North - For MaxFun fans in the northern UK area.
- UK McElFans - For McElroy fans in the UK.
Other Interest Groups
- McElroy Adjacent Groups! - For cataloguing spin-off groups.
- (Looking For A) *GREATJOB* 👋👋 - For job seeking advice and stories.
- Collaboreighteen - A 2018 collaboration group.
- Fully Realized Shitposting Creations - For memes and funny posts that relate to The Adventure Zone.
- McShit Elroyposting - For memes and funny posts that relate to the McElroys.
- Things You Can't Help But Read In Griffin McElroy's Voice
- Things You Can't Help But Read In Justin McElroy's Voice
- Things You Can't Help But Read In Travis McElroy's Voice
- griffin mcelroy’s adult weed school - A 420-friendly group.
- Human Beings With Very Large Flashlights (MBMBaM adjacent) - For female, and female-adjacent, identifying people.
- McElPets - For pictures of cute pets and animals.
- My Bummer, My Bummer and Me - A mental health support group.
- The Adventure Zone Cosplayers
- My Book, My Book and Many Friends
- i'm like a rotisserie shithead - A group for those who enjoy expressing themselves through fashion.
- Maximum Fun Creatives Club
- MBMBaM-wrimos - For people that are participating in NaNoWriMo.
- MBMBaMbinos Film Appreciation Group - For those who are fans of film and the discussion of them.
- The Legato Conservatory (a McElfan Musicians' Guild) - For those who play music/an instrument.
- tMGMBMBaM - For fans of the McElroys that are also fans of the indie band The Mountain Goats.
- Vore the Rich - A political group for those who are left-wing.
- Welcome To Smooch Island - A dating group for fans of the McElroys.
- Smooch Island 2: Electric Smoochaloo - For people already in relationships and looking for advice.
- Parents Of Cool Babies (and Teens!) - For parents and caregivers of children of all ages.
- MBMBAM Gaming Group - For fans of gaming - whether it be video or tabletop.
- Y'all Wanna Yahtzee: A McElroy Boardgame Appreciation Group
- My Mana, My Magic, and Me - For people who are fans and players of Magic the Gathering.
- The Adventure Zone: The WoW Guild
- 20🐍 Zag On 'Em!
- Good Out Here -- Recovery for the Estranged
- Indiana MaxFunsters - For MaxFun fans in Indiana.
- I Cast Zone Of Truth - for those who are magically inclined.
- My Ace, My Aro, and Me - for people on the asexual and aromantic spectrums, as well as allies.
- My Tummy, My Tummy, and Me: A Self-Love Group for Modren Fatties