  We consider the Ruelle zeta function $R(s)$ of a genus $g$ hyperbolic Riemann
surface with $n$ punctures and $v$ ramification points. $R(s)$ is equal to
$Z(s)/Z(s+1)$, where $Z(s)$ is the Selberg zeta function. The main result of
this work is the leading behavior of $R(s)$ at $s=0$. If $n_0$ is the order of
the determinant of the scattering matrix $\varphi(s)$ at $s=0$, we find that
\begin{align*} \lim_{s\rightarrow
0}\frac{R(s)}{s^{2g-2+n-n_0}}=(-1)^{\frac{A}{2}+1}(2\pi)^{2g-2+n
}\tilde{\varphi}(0)^{-1} \prod_{j=1}^v m_j, \end{align*}which says that $R(s)$
has order $2g-2+n-n_0$ at $s=0$, and its leading coefficient can be expressed
in terms of $m_1$, $m_2$, $\ldots$, $m_v$, the ramification indices at the
ramification points, and $\tilde{\varphi}(0)$, the leading coefficient of
$\varphi(s)$ at $s=0$. The constant $A$ is an even integer, equal to twice the
multiplicity of the eigenvalue $-1$ in the scattering matrix $\Phi(s)$ at
$s=1/2$, and $(-1)^{\frac{A}{2}}=\varphi\left(\frac{1}{2}\right)$.
  We also consider the order of the Ruelle zeta function at other integers.
