Forty-nine angular distributions for states in Na 23 up to 16.6 MeV in excitation energy populated by the C 12 (N 15, α) Na 23 reaction have been measured in 400 keV intervals for bombarding energies from 36.0 to 39.2 MeV. Hauser-Feshbach calculations have been made to suggest spins for most of the states observed. Shell-model predictions were used to guide the suggestions for positive-parity spin state locations. High-spin members of three rotational bands, K π= 3 2+, 1 2+, and 1 2−, were suggested and average moment-of-inertia parameters were extracted from the band systematics.