Most pool games are designed for four to six people. That works fine for a Tuesday afternoon, but when you are hosting a full-on pool party with 10, 15, or 20 people, you need games that can handle the crowd.
The worst thing at a big pool party is half the group sitting on the deck watching while four people play. The games on this list are built for large groups. Everyone plays. Nobody waits on the sidelines. And most of them are competitive enough to keep adults engaged for hours.
Here are 10 pool games that actually work when you have a big crew.
1. Water Volleyball Tournament
Players: 10 to 20+ (teams of 3 to 6 per side)
Equipment: Pool volleyball net, water volleyball
This is the king of large group pool games and it is not even close. A volleyball net across your pool instantly turns it into a competitive arena that can entertain a crowd all day long.
Set up a round-robin tournament with three or four teams. Each match plays to 15 points. Losers rotate out, winners stay on. Keep a bracket on a whiteboard by the pool so everyone can track standings.
The beauty of water volleyball is that skill levels blend easily. Strong players and weak players end up on the same team and it still works. The water equalizes things in a way that land volleyball does not.
If you need a net setup, check out our guide to the best pool volleyball nets and learn how to play water volleyball with proper rules.
2. Pool Relay Races
Players: 10 to 30+ (teams of 4 to 8)
Equipment: Pool noodles, kickboards, ping pong balls (varies by race)
Relay races are the secret weapon for large groups because you can put unlimited people on a team. Split everyone into two to four teams, line them up on one end of the pool, and run through a series of different relay styles.
Some relay ideas that work well: classic freestyle sprint, kickboard only, pool noodle ride (sit on a noodle and paddle across), ping pong ball on a spoon, and the backwards swim. Run five different relays and keep cumulative team scores.
For a full breakdown of relay formats and rules, check out our pool relay race ideas guide.
3. Sharks and Minnows
Players: 10 to 25
Equipment: None
This is the pool version of tag and it works perfectly with big groups. One person starts as the shark in the middle of the pool. Everyone else is a minnow lined up on one end.
When someone yells “go,” all the minnows try to swim from one end to the other without getting tagged by the shark. If you get tagged, you become a shark too. Each round, the shark team grows and the minnow team shrinks. Last minnow standing wins.
The game gets more chaotic and more fun as the shark count grows. With 15 or 20 players, the final rounds are pure pandemonium.
4. Chicken Fight Tournament
Players: 10 to 20 (pairs)
Equipment: None
Pair everyone up. One person sits on their partner’s shoulders. Two pairs face off and the riders try to push each other off while the bases try to stay standing. Last pair standing in each matchup advances.
Run a proper bracket. Eight pairs makes a perfect three-round single elimination tournament. Award a ridiculous trophy or crown to the winning pair.
Safety rules: play in water that is at least waist deep for the bases, no punching or grabbing faces, and stop immediately if anyone calls it. Keep things competitive but controlled.
5. Pool Basketball
Players: 10 to 16 (teams of 5 to 8)
Equipment: Pool basketball hoop, water basketball
Pool basketball works like regular basketball but in the water, which makes it surprisingly exhausting and hilarious. Set up a hoop at one end of the pool and play half-court games.
With a big group, run a tournament with rotating teams. Games to 11 by ones. Winners stay on, losers rotate out. The water slows everyone down enough that non-athletic players can compete with the gym rats.
Learn the full rules in our how to play pool basketball guide.
6. Treasure Hunt
Players: 10 to 25
Equipment: Sinkable dive toys, coins, weighted objects
Throw a bunch of sinkable objects into the pool. Coins, dive sticks, dive rings, and weighted toys all work. The more items, the better. For a big group, use 50 to 100 items.
Assign point values. Dive sticks are worth one point. Rings are worth three. Coins are worth five. One special “golden” item is worth 20. Everyone jumps in at once and you have two minutes to collect as many points as possible.
You can play individually or in teams. For a team version, each team sends one diver at a time in a relay format. Collected items go in a team bucket. Most points after all items are retrieved wins.
This game works in any depth, but make sure everyone follows basic pool safety rules. No diving headfirst in shallow water.
7. Synchronized Swimming Contest
Players: 10 to 20+ (teams of 3 to 5)
Equipment: Waterproof speaker for music
This one is all about the laughs. Split into teams and give each team 15 minutes to choreograph a synchronized swimming routine to a song of their choice.
Routines should be 60 to 90 seconds long. Award points for creativity, synchronization, difficulty, and entertainment value. Have the non-performing teams judge on a scale of one to 10.
Nobody is good at synchronized swimming. That is the point. The worse the attempts, the funnier it gets. This game consistently produces the best pool party moments.
8. Water Balloon Toss
Players: 10 to 30 (pairs)
Equipment: Water balloons (lots of them)
Line up pairs facing each other about three feet apart. Each pair gets a water balloon. Toss it back and forth. After each successful catch, both partners take one step back.
If your balloon breaks, you are out. Last pair with an intact balloon wins. Simple, classic, and it scales to any group size.
Pro tip: fill 100 or more balloons before the party. The game goes through them fast and you want enough for multiple rounds. A balloon filling station attached to a hose makes this way less tedious.
9. Human Whirlpool
Players: 10 to 20
Equipment: None
This is more of a group activity than a competitive game, but it is a blast with a big group and you should absolutely do it at least once.
Everyone gets in the pool and starts walking in one direction around the edge. Walk, then jog. After a couple of minutes, the water starts moving with you, creating a real current. Once the whirlpool is strong enough, everyone lifts their feet and lets the current carry them.
Then someone yells “reverse” and everyone tries to walk against the current. It is way harder than it sounds and the struggle is genuinely funny.
The more people you have, the stronger the whirlpool gets. With 15 to 20 people in a standard residential pool, you can generate a surprisingly powerful current.
10. Marco Polo: Battle Royale Edition
Players: 10 to 20
Equipment: None (optional: pool noodles)
Classic Marco Polo gets boring with too many people because the “it” person catches someone almost immediately. The battle royale version fixes this.
Start with three or four people who are “it” simultaneously, all blindfolded or with eyes closed. The rest of the players scatter in the pool. When an “it” player calls “Marco,” everyone must respond “Polo.” Tagged players join the “it” team.
The twist: give the non-it players pool noodles. They can use them to gently redirect the “it” players without touching them directly. This adds a strategic element and keeps the game going longer.
Play until one last survivor remains. That person gets bragging rights and picks the next game.
Tips for Running Games With Big Groups
Rotate quickly. Dead time between games kills momentum. Have the next game ready to explain before the current one ends.
Keep score visibly. Use a whiteboard, poster board, or phone screen cast to a TV if you have one outside. People stay more engaged when they can see standings.
Mix competitive and casual. Alternate high-energy games like relay races with lower-key ones like the human whirlpool. People need breaks.
Designate a referee. Someone needs to explain rules, keep score, and settle disputes. This person can rotate between games.
Have enough equipment. Nothing stalls a party like waiting for a ball or net. Stock up on pool toys for adults and have extras of anything essential.
For more pool game ideas beyond what is on this list, check out our master list of swimming pool games everyone should know.
Frequently Asked Questions
What is the best pool game for a group of 20 or more people?
Water volleyball tournament is the best option for very large groups. You can have four to six teams rotating through matches while others watch, eat, and socialize between games. The tournament format keeps everyone involved over several hours without requiring all 20 people in the pool at once.
Do I need to buy special equipment for large group pool games?
For most games, you need minimal equipment. A volleyball net and ball covers your best option. Beyond that, dive toys for treasure hunts, a basketball hoop for pool basketball, and water balloons for the toss are all cheap and easy to find. At least half the games on this list require no equipment at all.
How do I keep large group games safe?
Establish clear rules before each game starts. No aggressive pushing or holding people underwater. Stay in depths where everyone can stand if needed. Designate a non-playing adult as a safety watcher during games. Take breaks every 30 minutes so people can rest and hydrate.
What if some people in the group are not strong swimmers?
Most of these games work in chest-deep water where weaker swimmers can stand. Water volleyball, chicken fights, the human whirlpool, and water balloon toss all work in shallow water. Just avoid deep-water games like treasure hunt diving for anyone who is not comfortable in deep water. Pair weaker swimmers with stronger ones for team games.
How long should each game last?
Individual games should run 10 to 20 minutes before rotating to the next one. Tournament formats like volleyball or basketball can run longer at 30 to 60 minutes. Plan for about three to four hours of total game time at a full pool party, with food and rest breaks mixed in.