The isobaric thermal expansivity alpha(p) in the temperature and pressure intervals of (278.15 to 348.15) K and (5 to 50) MPa is reported for an assorted set of room temperature ionic liquids (RTILs) using a calorimetric method with an uncertainty of 2 %. The RTILs were selected to represent some of the most widely studied anions and cations; 1-butyl-3-methylpyridinium tetrafluoroborate [C(4)mpyr][BF(4)], 1-ethyl-3-methylimidazolium tetrafluoroborate [C(2)mim][BF(4)], 1-hexyl-3-methylimidazolium tetrafluoroborate [C(6)mim][BF(4)], 1-octyl-3-methylimidazolium tetrafluoroborate [C(8)mim][BF(4)], 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C(2)mim][NTf(2)], and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C(6)mim][NTf(2)] are analyzed. The same general trends were obtained for the studied liquids, although differences are found both in the magnitude and in the alpha(p) behavior against temperature and pressure.