What Is Keno?

Keno is a numbers game built around a single repeating draw: 20 numbers pulled at random from a pool of 1 through 80. You pick which numbers you think will come up, and your prize depends on how many of your picks land among the 20 drawn. It's a lottery drawing that runs every few minutes instead of twice a week.

People sometimes lump it in with bingo, but the two differ in one key way. In bingo you're handed a card and wait for it to fill. In keno you choose your own numbers, your stake, and how many draws they ride. You control the shape of the ticket, if not the outcome.

Where do you actually find keno?

You'll find the same core game in four homes: casino keno lounges, video keno machines, state lottery screens in bars and restaurants, and online casinos. The rules barely change between them; the pace and paytables do. Every keno bet comes down to your numbers (your "spots"), your stake, and one draw. Each drawn number matching one of yours is a "catch," and the paytable pays you based on how many spots you played and how many you caught.

The choices that define a ticket are simple: how many spots (more spots means bigger top prizes but rarer sweeps), how much per game, and how many consecutive games one ticket rides. Casinos layer fancier ticket types, way tickets, king tickets, combination tickets, on top of that, but those are just bookkeeping. Every combination inside still faces the same math. For the step-by-step mechanics of actually filling out a ticket, see how to play keno, and for the vocabulary behind every one of these terms, keep the keno glossary handy.

How rare is a big win, really?

To feel the spots-versus-catches trade-off: on a 5-spot ticket you'll catch all five about once in 1,551 draws, four about once in 83, and three about once in 12. Roughly 90% of the time you'll catch two or fewer, which typically pays nothing at that ticket size. That's the shape of keno everywhere: frequent near-misses, occasional mid-size hits, and a top prize you shouldn't plan around. The full breakdown of every catch probability for every spot count lives in the odds and probability table.

Is keno actually a good bet?

Judged purely on the math, keno is a tough bet. Casino keno carries a house edge of roughly 25% to 29%, and field surveys have found it ranging as low as 65% to 80% returned (a 20% to 35% edge) in live lounges. For comparison, blackjack played with basic strategy costs well under 1%, and roulette runs 2.7% to 5.26%. Video and online keno can run friendlier paytables, sometimes under 15% or even under 4% online, but pace matters just as much as the printed edge: a machine you can play twenty times faster than a live lounge multiplies whatever edge it carries.

Keno's story is often told as 2,000 years old, invented in Han-dynasty China to help fund the Great Wall. That's legend; the documented record starts in 1847 Macao. The game's Chinese roots are real regardless: it was originally called baige piao, "white pigeon ticket," and crossed to the western United States with Chinese immigrants in the 1840s. In Nevada, where lottery law made a numbers draw awkward, casinos ran it from 1933 as "Race-Horse Keno" with horses' names instead of numbers, until the law changed in 1951 and keno became the game we know today, still calling each draw a "race."

Keno is fine entertainment if you price it honestly: pick a budget, expect to lose a meaningful slice of every dollar on average, and never bet like a jackpot is coming due.

Sources

• Wizard of Odds — Keno — retrieved July 2026
• Wikipedia — Keno — retrieved July 2026
• Encyclopaedia Britannica — Keno — retrieved July 2026
• Wizard of Odds — House Edge of Casino Games Compared — retrieved July 2026
• Maryland Lottery — Keno — retrieved July 2026