The (2 + 1) resonance-enhanced multiphoton ionization (REMPI) spectrum of Cl-2 has been recorded between 76 000 and 90 000 cm(-1). The origins of twenty Rydberg states are located, with the s series (4s - 8s) generally exhibiting four Omega components and the d series (3d-5d) two components for each value of n. Vibronic coupling between the beta(1(g)) ion-pair state and the 3d and 4d (Omega = 1) states is pronounced, necessitating the use of mass resolved REMPI for the analysis of these vibronically mixed states.