Nobody “invented” Las Vegas in the way a single person invents a gadget; the city grew in stages, and different people shaped different eras of it. The short answer is: Las Vegas was named and first noted as a place by explorers in the 1800s, officially founded as a town in the early 1900s, and “invented” as the modern casino city by mid‑20th‑century developers and mob figures.

What “Las Vegas” Originally Meant

  • The name Las Vegas (“the meadows” in Spanish) was given to the valley in 1829 by Rafael Rivera, a scout in a Spanish trade caravan, because of its springs and green grasses in an otherwise desert region.
  • At that time, it wasn’t a city—just an important watering stop on the Old Spanish Trail between New Mexico and Los Angeles.

So if you mean “who invented the name and idea of this place as an oasis,” Rivera is usually credited.

Who Founded the Town

  • The actual town of Las Vegas emerged in the early 1900s as a railroad stop and settlement in Nevada (for example, around the 1905 railroad land auction and later incorporation), not as a casino resort city yet.
  • Railroads, land developers, and early settlers collectively created that first civic Las Vegas; there isn’t one universally agreed “founder” in the way there is for some older cities.

So if you mean “who founded the city ,” historians generally talk about railroads, land companies, and early civic leaders rather than a single inventor.

Who “Invented” Modern Las Vegas

When people say “who invented Las Vegas,” they often mean the modern Strip with big themed casinos.

  • Mobster Bugsy Siegel is widely called the “founder of modern Las Vegas” because he took over and opened the Flamingo Hotel & Casino in 1946 with a lavish, resort‑style concept that set the tone for future casinos.
  • Later figures like Howard Hughes and other corporate developers bought and built major resorts in the 1960s–1990s, pushing Las Vegas toward the mega‑resort, entertainment‑capital model we recognize today.

So if you mean “who invented modern Las Vegas as a glamorous casino resort city,” Bugsy Siegel usually gets that nickname, with many others expanding on his model.

Why There’s No Single Inventor

  • Las Vegas has at least three “invention” moments:
    1. The naming of the valley (Rafael Rivera).
2. The **founding of the town/railroad city** (early 1900s developers and officials).

3. The **creation of the modern Strip** (Bugsy Siegel and later resort builders).
  • Because each step reshaped the place into something new, historians and locals often debate which stage “counts” as the real invention.

If you’re asking the classic trivia‑style version:

  • Name origin: Rafael Rivera.
  • Modern casino Las Vegas: Bugsy Siegel.

TL;DR:
No one person invented Las Vegas. Rafael Rivera named the valley “Las Vegas” in 1829, rail and land developers created the early town in the 1900s, and Bugsy Siegel is often credited with inventing modern, glamorous casino Las Vegas through the Flamingo resort.

Information gathered from public forums or data available on the internet and portrayed here.