The conversion of n-heptane over a set of Pt- and Pd-/SAPO-11 catalysts has been investigated over the temperature range 300-500-degrees-C with a feed ratio (H-2/HC) of 15 at 1 atm. Two additional Pt-based catalysts, modified by Na addition (Na/Pt of 0.50 and 0.87) were also studied. Major products were cracked species (C1-C6), i-heptane, n-heptene and toluene. Minor amounts of methylcyclohexane, -hexene and ethylcyclopentane were also observed with the sodium-containing catalysts. Deactivation by coke formation was observed primarily in the 400 to 500-degrees-C range, however the selectivities for isomerization and cracking were not affected by cracking.The Pt/SAPO-11 catalysts were superior to the Pd formulations for activity, activity maintenance and ring closure selectivity. Na is an effective promoter for toluene formation, particularly at higher temperatures. The overall reaction pathways for these catalysts are consistent with a scheme proposed previously for n-hexane [M. Hoffmeister and J.B. Butt, Appl. Catal. A, 82 (1992) 169].