Twenty-six is a composite number, its proper divisors being 1, 2, and 13.

Twenty-six is the number of letters in the English alphabet.

In the classification of finite simple groups there are 26 sporadic groups.

**Twenty-six** is also

- The atomic number of iron.
- The designation of Interstate 26, a freeway that runs from South Carolina to North Carolina.
- Often the number of episodes in a Japanese anime series. For example,
*Cowboy Bebop*,*Outlaw Star\*and*Trigun*.

This article is about the number. For the year A.D. 26, see 26.