A submarine sonar profile obtained in Davis Strait by USS Queenfish in February 1967 has yielded the first quantitative data on ice thickness distribution in the region. Within 50--100 km of the ice edge there is a ''marginal ice zone'' (MIZ) where the mean draft is 0.25--0.51 m, most of the ice (93--100%) is undeformed and there are many leads but few ridges, all of them less than 6.1 m in draft. The remainder of the region is an ''interior zone'' composed mainly of first-year ice with a mean draft of 0.77--1.66 m, increasing slightly from NE to SW. Level ice is less common than in the MIZ (67--91% of the cover) as are leads. Ridging is more common with a maximum observed keel draft of 19.56 m. The overall mean ice thickness distribution has a peak at a draft of 1.05 m (1.18 m thickness), identified as the preferred draft of undeformed first-year ice at this time. Ice draft and keep draft distributions followed a negative exponential distribution at depths beyond 3--4 m, and the distribution of lead widths followed a power law with exponent -2.29.