  Scaling relations between the superconducting transition temperature $T_{\rm
c}$, the superfluid stiffness $\rho_{\rm s}$ and the normal state conductivity
$\sigma_0(T_{\rm c})$ are identified within the class of molecular
superconductors. These new scaling properties hold as $T_{\rm c}$ varies over
two orders of magnitude for materials with differing dimensionality and
contrasting molecular structure, and are dramatically different from the
equivalent scaling properties observed within the family of cuprate
superconductors. These scaling relations place strong constraints on theories
for molecular superconductivity.
