The History of Keno Gambling: From Ancient China to Modern Casino Floors
A government official in ancient China needed to fund a war. Taxes weren’t covering it. So he invented a lottery game using characters from a famous poem, and the citizens bought in. That game, created roughly 2,200 years ago, is the ancestor of every keno ticket you’ve ever filled out.
The history of keno gambling stretches from the Han Dynasty to the construction of America’s first transcontinental railroad, through anti-lottery crackdowns in early 20th-century Nevada, and onto the screens of smartphones worldwide. It’s a story about immigration, adaptation, legal maneuvering, and a game so fundamentally appealing that no amount of cultural transplantation or format change could kill it.
Two millennia of survival makes keno one of the oldest continuously played gambling games on the planet.
- Keno originated around 200 B.C. in China, created by Cheung Leung of the Han Dynasty to raise funds during wartime; legend credits the game with helping finance construction of the Great Wall
- The original game used characters from “The Thousand Character Classic,” a famous Chinese poem with 1,000 characters, far more than the 80 numbers used today
- Chinese immigrants brought the game to the United States in the 1800s during the railroad construction era, where it was called the “Chinese Lottery”
- American operators replaced Chinese characters with numbers and renamed it “Horse Race Keno” to sidestep anti-lottery laws in the early 1900s
- Nevada’s legalization of gambling in 1931 gave keno a permanent legal home, though the “Horse Race” label was dropped to avoid conflict with horse racing betting regulations
- The digital era made keno available globally through online casinos and state lottery systems, turning a 2,200-year-old game into a 24/7 worldwide phenomenon
Ancient China: Where Keno Was Born
The most widely accepted origin story places keno’s birth in the Han Dynasty, roughly 200 B.C. A government official named Cheung Leung reportedly created the game during a period of prolonged military conflict. His city’s treasury was running dry, and the citizens were tired of paying war taxes. Leung needed a voluntary way to raise funds. His solution: a lottery.
The game was based on “The Thousand Character Classic” (Qian Zi Wen), a famous Chinese poem composed of exactly 1,000 characters, each one used only once. Players would select characters from the poem, and winning characters were drawn at random. The game spread across China and, according to legend, generated enough revenue to fund military campaigns and contribute to the construction of the Great Wall.
The original game bore little resemblance to modern keno. One thousand characters is a massive selection pool compared to today’s 80 numbers. Players chose far more characters per ticket. The drawings were conducted by hand, and results were reportedly delivered to distant villages by carrier pigeon, giving the game its Chinese nickname: “the white pigeon game.”
This pigeon-powered communication system was one of history’s first lottery result delivery networks. The game thrived across China for centuries, remaining popular through multiple dynasties and social upheavals. Its survival through so many eras of change speaks to something fundamental about the format: pick your numbers, wait for the draw, hope for a match. That loop has kept humans engaged for over two thousand years.
The Journey to America: Keno Crosses the Pacific
Keno arrived in the United States with Chinese immigrants in the mid-1800s. The California Gold Rush (beginning in 1848) and the construction of the First Transcontinental Railroad (1863 to 1869) drew tens of thousands of Chinese workers to the American West. They brought their culture with them, including their gambling games.
In American Chinatowns, particularly in San Francisco and along the railroad routes, the game was known as the “Chinese Lottery.” It retained its original format with Chinese characters, which made it inaccessible to non-Chinese players. The game was popular within Chinese communities but remained a cultural curiosity to most Americans.
The cultural barrier of Chinese characters limited the game’s growth beyond immigrant communities. That barrier would eventually fall, but it would take decades of adaptation and a few clever legal workarounds to transform the Chinese Lottery into the keno we recognize today.
Becoming “Keno”: The American Transformation
The early 20th century brought two critical changes that turned a Chinese immigrant pastime into an American casino staple.
Change 1: Numbers Replace Characters
Operators replaced the Chinese characters with Arabic numerals (1 through 80), making the game instantly accessible to English-speaking players. The character pool was also reduced from 1,000 to 80, simplifying gameplay and speeding up draws. This single change removed the cultural barrier that had kept the game confined to Chinatowns for decades.
Change 2: The “Horse Race Keno” Workaround
Anti-lottery laws in many states made operating a number-drawing game legally risky. Operators found a creative solution: they renamed the game “Horse Race Keno” and framed each number as representing a “horse” in a “race.” Technically, players were betting on horse races, not playing a lottery. The distinction was paper-thin, but it was enough to satisfy the legal requirements of the era.
The game’s numbers were also reduced from 80 selected by players to 20 drawn by the house, establishing the 20/80 format that remains standard today. These changes, made over roughly 20 years between 1900 and 1930, transformed a foreign cultural artifact into a recognizable American gambling product.
Nevada Legalization: Keno Finds Its Permanent Home
Nevada legalized gambling in 1931. Keno was among the games that found a legal home in the state’s new casinos. But there was one more hurdle.
The “Horse Race” prefix had to go. Nevada’s new gambling laws treated horse racing bets differently from casino games, with separate regulations and tax structures. Operating “Horse Race Keno” in a casino would have subjected operators to horse racing regulations they didn’t want. The solution was simple: drop the “Horse Race” label and call the game just “Keno.”
| Era | Name | Format | Where Played |
|---|---|---|---|
| ~200 B.C. | Baige Piao (“White Pigeon Game”) | 1,000 characters | China |
| 1850s to 1900s | Chinese Lottery | Chinese characters, variable pool | American Chinatowns |
| 1900s to 1930s | Horse Race Keno | 80 numbers, 20 drawn | Underground/semi-legal US venues |
| 1931 onward | Keno | 80 numbers, 20 drawn | Nevada casinos, then nationwide |
| 1990s onward | Keno (digital) | Various formats (20/80, 20/70, 10/40) | Online casinos, state lotteries, mobile |
Keno lounges became a fixture in Nevada casinos throughout the mid-20th century. The format was perfect for casinos: the house edge was high (25% to 30%), draws could run continuously, and the game required minimal dealer interaction. Players filled out their cards, submitted them to a keno writer, and watched results on overhead monitors while eating dinner or playing other games.
It was passive gambling with the potential for large payouts, attracting a broad demographic that other table games didn’t reach.
Keno Goes Digital: The Online Revolution
The internet changed keno, as it did everything else: by making it faster, more accessible, and available around the clock.
Online casinos began offering keno in the late 1990s and early 2000s. The digital format brought several advantages. Draws that took 5 to 10 minutes in a live lounge could happen in seconds online. Players could run 200+ draws per hour instead of 6 to 12.Keno variations like Power Keno, Super Keno, Mini Keno, and Bonus Spot Keno emerged, each adding twists to the standard format.
State lotteries also adopted keno, running televised draws at bars, restaurants, and lottery retailers. States like Ohio, Michigan, Connecticut, and Virginia now operate keno games with draws every few minutes, available at thousands of retail locations. Our guides for Ohio Lottery Keno and Michigan Lottery Keno cover the specific rules and formats for those states.
Video keno terminals in casinos pushed the pace even faster. A player sitting at a video keno machine can complete a draw every 15 to 30 seconds. This speed is a double-edged sword: more chances to win per hour, but also dramatically faster bankroll depletion given the game’s steep house edge. If you’re new to the game and want to understand the rules before playing, our how to play keno guide covers the basics.
Why Keno Has Survived for 2,200 Years
Most gambling games from ancient civilizations are extinct. The dice games of Roman soldiers, the card games of medieval Europe, the tile games of imperial Japan: most have been replaced by modern inventions. Keno survived. Why?
Simplicity
The game’s core mechanic hasn’t changed since 200 B.C. Pick numbers. Watch a draw. See if yours match. A five-year-old can understand it. No rules to memorize. No decisions to make after placing your bet. No strategy to learn (though our how to win at keno guide covers the smartest approaches to a luck-based game). Keno’s simplicity makes it accessible to anyone, regardless of gambling experience.
The Jackpot Dream
Keno offers payout ratios that no table game can match. A $1 bet catching all 10 on a 10-spot ticket can pay $25,000 to $100,000 or more. That kind of return from a minimum wager is the same proposition that made Cheung Leung’s lottery attractive to war-weary Chinese citizens 2,200 years ago. The specific numbers have changed. The dream hasn’t.
Adaptability
Keno has survived because it adapts. Characters became numbers. Paper became digital. Casino lounges became smartphone apps. The game absorbs new technology without losing its identity. A keno draw in 2026 would be instantly recognizable to a player from 1950, 1900, or (with a little explanation about numbers vs. characters) 200 B.C.
The Story Continues: Keno in 2026 and Beyond
Keno’s trajectory points in one direction: more accessible, faster, and more varied. Mobile gaming has made keno a pocket-sized activity. State lotteries continue to expand keno availability at retail locations. Online casinos compete by offering better paytables, new variations, and progressive jackpots that grow into six figures.
The game that started as a wartime fundraiser in ancient China, traveled across the Pacific in the pockets of railroad workers, dodged anti-lottery laws by pretending to be a horse race, and found its legal home in Nevada casinos is now played by millions of people on every continent. Two thousand two hundred years of continuous play. Not bad for a game invented by a cash-strapped government official.
Our best keno numbers guide covers what modern draw data actually tells us about number selection (spoiler: every number has the same 25% probability). If you want to test the game that Cheung Leung started, the keno simulator is free and waiting. And if you prefer a game with a house edge that doesn’t start at 25%, our baccarat simulator offers practice at a game where the Banker bet gives the house just 1.06%.
History of Keno Gambling FAQs
Keno originated around 200 B.C. during the Han Dynasty in ancient China. It was created by Cheung Leung as a lottery to raise funds during wartime. The original game used characters from “The Thousand Character Classic,” a famous Chinese poem. The game has been played continuously for approximately 2,200 years, making it one of the oldest gambling games still in existence.
Chinese immigrants brought the game to the United States in the mid-1800s during the California Gold Rush and the construction of the First Transcontinental Railroad. It was known as the “Chinese Lottery” and was played primarily in Chinatown communities. American operators later replaced the Chinese characters with numbers 1 through 80 and renamed it “Horse Race Keno” to avoid anti-lottery laws.
The name “keno” likely derives from the French word “quine” (meaning five winning numbers) or the Latin “quini” (meaning five each). The exact linguistic path is debated by historians. The name was adopted by American operators in the early 1900s when the game transitioned from the “Chinese Lottery” format to the numbered version we recognize today.
This is a popular legend but historically uncertain. The Great Wall was built in stages over many centuries, and its earliest sections predate the Han Dynasty when keno was supposedly created. What’s more credible is that keno-style lotteries funded various government and military projects during the Han Dynasty era. The specific Great Wall connection is likely an embellishment.
Keno became fully legal in Nevada when the state legalized gambling in 1931. Before that, the game existed in a legal gray area, often operating as “Horse Race Keno” to sidestep anti-lottery laws. The “Horse Race” prefix was dropped once Nevada legalized casino gaming, and keno became a standard offering in Las Vegas and Reno casinos.
The core mechanic (pick numbers, watch a draw, match for prizes) hasn’t changed in 2,200 years. What’s changed is the format: 1,000 Chinese characters became 80 Arabic numerals; hand-drawn results delivered by pigeon became electronic draws on screens; casino lounges became online platforms. Modern keno variations like Power Keno, Mini Keno, and Progressive Jackpot Keno add twists, but the fundamental game remains what Cheung Leung created.
