  The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow
\nu_{\tau}$ oscillations in appearance mode through the direct observation of
tau neutrinos in the CNGS neutrino beam. In this paper, we report a study of
the multiplicity of charged particles produced in charged-current neutrino
interactions in lead. We present charged hadron average multiplicities, their
dispersion and investigate the KNO scaling in different kinematical regions.
The results are presented in detail in the form of tables that can be used in
the validation of Monte Carlo generators of neutrino-lead interactions.
