The adsorption behavior of some monochromophoric and bischromophoric styryl pyridinium dyes on silica gel has been investigated. The effect of temperature, chain length, and substituent on the adsorption phenomena have been studied, The adsorption isotherms are found to be of S- and L-types, depending on the structure of the adsorbate, The rates of adsorption have been determined for all the adsorbates and variation in the rates has been explained in accordance with the structure of the adsorbates. The surface area of the dyes has been calculated using literature data and compared with coverage area/molecule. The result is explained through monolayer adsorption of the dyes.