It's no surprise that Superman has been a member of lots of teams over the years. He's one of the most popular characters DC has, and the only thing keeping him from joining more groups are comic editors who want him free for his own ongoing storylines.
In-universe, Superman is a help to any group he joins. People already want to fight for him, so he's a natural leader. He's a powerhouse of a character who can run through armies by himself, but he's never been afraid to ask for help either. Any team with Superman on their side is automatically one of the most powerful groups in the DC Universe.
10 Justice Society Had Superman As An Honorary Member
1941
Superman wasn't a founding member of the Justice Society, but he was introduced to the team fairly early. The Justice Society was originally meant for heroes who didn't have their own comics and when heroes got their own books they "graduated" out of the series.
Since Superman had Action Comics, that was never an issue for him. Still, in All-Star Comics #7 by Gardner Fox, Everett E. Hibbard, Bernard Bailly, Ben Flinton, Stan Aschmeier, Sheldon Moldoff, and Jon L. Blummer, he made his first appearance alongside the team's other members. There, he aided the war effort and helped out Johnny Thunder before returning to his own adventures.
9 Legion of Super-Heroes Invited Superboy To Join Their Club
1958
It might be surprising to some, but the Legion of Super-Heroes predates the Justice League. They made their first appearance in 1958, bringing Superboy to the 31st century, to show him their clubhouse and ask him to join their group. Superboy completed their initiation tests and joined the group, becoming a member in good standing.
In the decades afterward, Superboy made multiple trips to the future to work with the Legion, becoming one of their longest-tenured members. While they eventually retconned Superboy's history with the team away in the '90s, it was brought back in the late 2000s when the original Legion returned.
8 The Justice League Had Superman As A Part-Time Member
1960
The Justice League is DC's premiere super-team, but Superman wasn't exactly a part of their first big mission. He'd been given a communicator for them to use when the heroes were struggling with a mission too big for any one hero but he was an outsider. However, in Brave and the Bold #28 by Gardner Fox, Mike Sekowsky, Bernard Sachs, Joe Giella, Murphy Anderson, and Gaspar Saladino, he wasn't able to come to their aid.
While the rest of the League was battling a threat on Earth, Superman was too busy punching meteors into space dust before they could reach Earth's atmosphere. Still, it's not long before Superman starts working alongside the rest of the team.
7 All-Star Squadron Was Assembled To Protect America From Sabotage
1981
In 1981, Earth-Two got another solo comic that focused on the adventures of its heroes during the Second World War. The team literally got its start when President Roosevelt assembled every available superhero and ordered them to keep the peace on the home front.
This superteam's roster included the Justice Society, the Freedom Fighters, the Seven Soldiers of Victory and more. Since this version of Superman no longer had a comic of his own to worry about, he was featured a bit more prominently in this series than he was in the original Justice Society of America adventures.
6 Superman Led The Justice League International For A Time
1992
The Justice League International had trouble recruiting Superman during the Post-Crisis era. The character actually turned down joining the group multiple times during their heyday. DC's editorial staff was more interested in keeping Superman separate from the rest of the heroes. In 1992, though, both the Justice League America and Justice League Europe experienced a major shift after being disbanded by the U.N.
The remaining heroes were forced to form their own groups if they wanted to continue being the Justice League. So in Justice League Spectacular #1 by Dan Jurgens, Ron Randall, Rick Burchett, Randy Elliott, Gene D'Angelo, and Bob Pinaha, two new teams were formed for the Justice League International. Superman became the leader of the American branch, leading Guy Gardner, Booster Gold, Blue Beetle, and Fire and Ice.
5 The Supermen of the Multiverse Helped Superman Save Earth
2009
During the Final Crisis event, the heroes found themselves up against a more powerful version of Darkseid than they'd ever faced before. With no other options, Superman went outside his own universe in search of the Miracle Machine. While on his search, Superman met with other Supermen from across the Multiverse.
Though Superman was able to save everyone from Darkseid, he exhausted his powers by activating the Miracle Machine. Superman's actions left him defenseless against another enemy, Mandrakk, but fortunately, the Supermen of the Multiverse appeared to save him. While Superman doesn't work with this group often, he does team up with them when necessary.
4 Superman Joined The Kryptonian Military Guild To Watch Zod
2009
During the late 2000s, Superman discovered the lost Kryptonian city of Argo. Combined with a group of escaped Kryptonians from the Phantom Zone, they created a world known as New Krypton. Orbiting Earth's sun, this New Krypton started to create the same society they had on their home world, splitting their societies up into different guilds.
Superman came to New Krypton with the goal of being with his people, but also to keep an eye on General Zod, who also escaped from the Phantom Zone. This goal led him to briefly join the military guild, where he taught them how to use their new powers.
3 Superman Expanded His Mantle With The Supermen of America
2011
Just before the New 52 rebooted and retconned a ton of DC Comics' history, Superman had a story in 2011 where he walked the United States of America, learning to ground himself. During this time, Superman learned more about himself and who he wanted to be. Though he initially wondered if there was a need for a Superman, he eventually decided to expand his reach.
From there, Superman invited multiple people to join a team called the Supermen of America. The team consisted of members like Steel, Super-Chief, Kon-El, Livewire, and Supergirl. Unfortunately, it lasted only one issue in the New 52 before it was retconned away.
2 Superman Led The Justice League: Team Mystery Against The Omega Titans
2019
When the Justice League needed to fight against the Omega Titans, they were forced to form four different teams capable of standing against the cosmic foes. Each member of the Justice League was split up and designated a different Titan to deal with for the sake of saving existence.
Superman was placed on Team Mystery, leading the Martian Manhunter, Sinestro, Starro, and Starfire. A strange team to be sure, but also a powerful one for a nearly impossible task. However, after Team Mystery failed to repair the Source Wall, they were forced to disband.
1 Superman Formed The Authority To Rescue A Planet From Mongul
2021
The original idea of Superman leading the Authority was meant to turn the hero into a more villainous version of himself. Fortunately, cooler heads won out and Grant Morrison got to write about a Superman trying to lead a team capable of reaching a better tomorrow. While they wrote the team for two issues, the idea was passed to Philip K. Johnson, who took the Authority to Warworld for his Warworld Saga storyline.
This version of the Authority combines well-known characters Apollo and Midnighter with Superman characters like Natasha Irons and the Earth-9 Flash, along with a handful of other heroes. Together, they traveled to Warworld and found a way to free the planet and people from Mongul's tyranny.