  The Jacobian is an algebraic invariant of a graph which is often seen in
analogy to the class group of a number field. In particular, there have been
multiple investigations into the Iwasawa theory of graphs with the Jacobian
playing the role of the class group. In this paper, we construct an Iwasawa
module related to the Jacobian of a $\mathbb{Z}_p$-tower of connected graphs,
and give examples where we use this to compute asymptotic sizes of the
Jacobians in this tower.
