The reactions of the cations CN+, HCN+, HCNH+, HC3N+, HC3NH+, H-3(+), H2O+, H3O+, N-2(+), CO+, HCO+, O-2(+), CO2+, HCO2+ and C2H2+ with atomic and molecular nitrogen have been characterized using a selected ion flow tube (SIFT) operating at room temperature. Rate coefficient and branching ratio data are reported for all ion-neutral reactions studied. Constraints arising from spin conservation considerations are found to be unimportant in cation-N atom processes.