  A simple way to find solutions of the Painlev\'e IV equation is by
identifying Hamiltonian systems with third-order differential ladder operators.
Some of these systems can be obtained by applying supersymmetric quantum
mechanics (SUSY QM) to the harmonic oscillator. In this work, we will construct
families of coherent states for such subset of SUSY partner Hamiltonians which
are connected with the Painlev\'e IV equation. First, these coherent states are
built up as eigenstates of the annihilation operator, then as displaced
versions of the extremal states, both involving the third-order ladder
operators, and finally as extremal states which are also displaced but now
using the so called linearized ladder operators. To each SUSY partner
Hamiltonian corresponds two families of coherent states: one inside the
infinite subspace associated with the isospectral part of the spectrum and
another one in the finite subspace generated by the states created through the
SUSY technique.
