Gas transport of helium, hydrogen, oxygen, nitrogen, methane and carbon dioxide gases in 2,2-(4-hydroxyphenyl)adamantane polysulfone and 1,3-(4-hydroxyphenyl)adamantane polysulfone has been measured. The adamantane-containing polymers have higher gas permeabilities in all cases and higher permselectivities in some cases compared with bisphenol A-based polysulfone (PSF). Oxygen solubility is higher for both adamantane-based polysulfones, particularly for the 2,2-isomer, and the high oxygen solubility coefficients are entirely responsible for the higher oxygen permeabilities compared with PSF. The physical properties of these materials are similar to those of fluorene bisphenol polysulfone (FBPSF); however, the T-g of the 2,2-isomer is higher while that of the 1,3-isomer is lower.