  In this paper, we consider spin-3 Chern-Simons-like theories of gravity as
extended theories of spin-3 gravity in (2+1)- dimension. In order to determine
the number of local degrees of freedom we present the Hamiltonian formulation
of these theories. We extract the Hamiltonian density, then we find primary and
secondary constraints of these theories. Then we obtain the Poisson brackets of
the primary and the secondary constraints. After that we count the number of
local degrees of freedom of spin-3 Chern-Simons-like theories of gravity. We
apply this method on spin-3 Einstein-Cartan gravity and spin-3 topologically
massive gravity. According to the our results the spin-3 Einstein-Cartan
gravity and the spin-3 topologically massive gravity have respectively zero and
one bulk local degree of freedom.
