Groups of order 11

This article gives information about, and links to more details on, groups of order 11
See pages on algebraic structures of order 11 | See pages on groups of a particular order

There is, up to isomorphism, a unique group of order 11, namely cyclic group:Z11. This follows from the fact that $11$ is prime and there is a unique isomorphism class of group of prime order, namely that of the cyclic group of prime order.