The effect of different types of acidic dopant namely, poly(vinyl sulfonic) (PVS), camphor sulfonic (CSA) and hydrochloric acids on the electrodeposition of polyaniline (PANI) films by cyclic voltammetry has been investigated and correlated with the morphology and properties of the polymers produced. The polymer films were studied by cyclic voltammetry, electron microscopy, u.v.-visible spectroscopy, X-ray diffraction and conductivity measurements. The nucleation step of the electrodeposition of PANI depends on the counter-ion of the dopant and significantly affects polymer growth as well as the morphology of the polymers produced. The properties of the polymeric films were also greatly influenced by the type of acid dopant used in the electrodeposition. Although all dopants used were protonic acids the conductivity of the polymer was affected by the counter-ion and could be enhanced by exposition to m-cresol due to secondary doping effects.