  In this paper, string C-groups of all ranks $3 \leq r \leq \frac{n}{2}$ are
provided for each alternating group $A_n$, $n \geq 12$. As the string C-group
representations of $A_n$ have also been classified for $n \leq 11$, and it is
known that larger ranks are impossible, this paper provides the exact values of
$n$ for which $A_n$ can be represented as a string C-group of a fixed rank.
