The Greek letter between pi and sigma is rho.

Quick Scoop

The Alphabet Fact

In the standard order of the Greek alphabet, the sequence goes:
… pi, rho , sigma …, so rho is the letter that comes between pi and sigma.

Rho is the 17th letter of the Greek alphabet and is written as Ρ (uppercase) and ρ (lowercase).

Why This Shows Up in Puzzles

  • Crossword clues like “greek letter between pi and sigma” almost always use RHO as the answer.
  • It is popular in word puzzles because it’s short, uses common letters, and fits nicely in many grids.

Extra Nerdy Note

  • In math and science, rho often denotes density, correlation, or radius-related quantities, which helps it appear in technical contexts as well.
  • So if you see a puzzle, trivia question, or quiz asking for the “greek letter between pi and sigma,” RHO is the intended solution.

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