What is the last letter of the Greek alphabet?

The story behind the answer

Omega is correct because it’s the 24th and final letter of the Greek alphabet—hence the common phrase “from Alpha to Omega,” meaning from beginning to end. In contrast, Kappa, Epsilon, and Mu are mid-alphabet letters.

Fun context: “Omega” comes from the Greek ō mega, meaning “great O,” distinguishing it from Omicron, “small O.” The uppercase symbol Ω appears in science for ohms (electrical resistance) and angular velocity, reinforcing its prominence. A handy memory trick: imagine a timeline that starts at Alpha (A) and culminates at the grand, crown-like Ω—Omega as the ultimate “ending.”