The reactions of a series of CmHn+ ions (m = 1-6; n = 0-6) with atomic and molecular nitrogen have been investigated using a selected ion flow tube (SIFT) operating at room temperature. Rate coefficients and product distributions are reported for the reactions studied. The hydrocarbon cations examined in this work are largely unreactive with molecular nitrogen (association is found in just three cases), whereas multiple product channels are observed in reactions between CmHn+ ions and N atoms. For m < 3, some N atom incorporation into the hydrocarbon ion occurs. For m > 3, the N atom is usually incorporated into the neutral leaving group (HCN).