| Tso | |
| Letter: | Ց ց |
| Script: | Armenian script |
| Type: | Alphabet |
| Typedesc: | ic |
| Language: | Armenian language |
| Phonemes: | pronounced as /ink/ |
| Unicode: | U+0551, U+0581 |
| Alphanumber: | 33 |
| Number: | 6000 |
| Usageperiod: | 405 to present |
| Direction: | Left-to-Right |
Tsʼo, or Cʼo (majuscule: Ց; minuscule: ց; Armenian: ցո; Classical Armenian: ցօ) is the thirty-third letter of the Armenian alphabet. It represents the voiceless aspirated alveolar affricate (/t͡sʰ/) in both Eastern and Western varieties of Armenian. Created by Mesrop Mashtots in the 5th century, it has a numerical value of 6000.[1] Its shape in capital is visually similar to one other Armenian letter, Hi (Յ). Its shape in lowercase form is also similar to the minuscule form of the Latin letter G (g). In cursive, both letters are similar to a cursive Y.