The 1910 founding and the Stockyards City context
Cattlemen's opened in 1910, three years after Oklahoma statehood, in the rapidly growing Stockyards City commercial district southwest of downtown Oklahoma City. The Oklahoma National Stockyards had been established in 1910 as well — the two openings were essentially simultaneous — and Stockyards City was being built around the new auction market to serve the daily flow of cattle, ranchers, traders, and railroad workers passing through.
The original restaurant was a small operation called the Cattlemen's Cafe, owned and operated by Italian immigrant Hank Cargill (no relation to the agribusiness family). Cargill ran the cafe for roughly three decades through the height of the cattle-trading era; the operation grew steadily as Stockyards City prospered through World War I, the 1920s, and into the early years of the Great Depression.
The Oklahoma National Stockyards was, at peak in the 1940s and 1950s, the largest single-day cattle auction in the United States and one of the largest in the world. Tens of thousands of cattle moved through the stockyards weekly during peak years, brought in by rail from across the southern Plains and bought by buyers who shipped them east to feedlots, packers, and ultimately American grocery stores. Cattlemen's was the primary restaurant feeding this trade; for many traders, an early-morning Cattlemen's Breakfast before the auction was the daily ritual.