Big Apple
"The Big Apple" was popularized as a name for New York City by John J. Fitz Gerald in a number of horse-racing articles for the "New York Morning Telegraph" in the 1920s. The earliest of these was a casual reference on 3rd May, 1921:
List of city nicknames in the United States
The top-ranked nickname in the survey was New York City's "The Big Apple," followed by "Sin City" (Las Vegas), "The Big Easy" (New Orleans), "Motor City" (Detroit), and "The Windy City" (Chicago). In addition to the number-two nickname, Las Vegas had the top-rated slogan: "What Happens Here, Stays Here." The second- through fifth-place slogans were "So Very Virginia" (Charlottesville, Virginia), "Always Turned On" (Atlantic City, New Jersey), "Cleveland Rocks!" (Cleveland, Ohio), and "The Sweetest Place on Earth" (Hershey, Pennsylvania).