<p>Extinct sloths vary in locomotor adaptations, but those of Caribbean sloths remain unclear. Recent analyses found that femoral neck angle and degree of femoral neck anteversion can distinguish extinct Caribbean sloth genera from each other; however, these data were only analyzed relative to extant sloths, limiting functional interpretations. Here, we investigate femoral neck angle and degree of anteversion broadly among extant xenarthrans to reconstruct the locomotor behaviors of extinct Caribbean sloths. Femora from nine extant xenarthran genera (<i>n</i> = 63; <i>Bradypus; Choloepus; Cyclopes; Dasypus; Euphractus; Myrmecophaga; Priodontes; Tamandua; Tolypeutes</i>) and four extinct sloth genera (<i>n</i> = 61; <i>Acratocnus; Megalocnus; Neocnus; Parocnus</i>) were surface scanned. Axes representing the femoral neck, shaft, maximum cross-section at 30% whole bone length (CS), and geometric axis of the condyles (GA) were extracted. Femoral neck angle was calculated between the femoral neck and shaft axes. Degree of femoral neck anteversion was calculated between the femoral neck and CS and GA axes, respectively. Non-parametric MANOVAs were run to test for significant differences among the genera using both femoral neck angle and degree of femoral neck anteversion. <i>Parocnus</i> does not significantly differ from three of the four armadillos, nor <i>Myrmecophaga</i>, in some measures (<i>p</i> &gt; 0.05), supporting suggestions that they were primarily terrestrial. <i>Neocnus</i> does not exhibit consistent relationships with extant taxa. There are significant differences between <i>Neocnus</i> from localities representing different paleoislands. <i>Acratocnus</i> and <i>Megalocnus</i> fall outside the range of extant xenarthrans (<i>p</i> &lt; 0.05), but do not significantly differ from each other (<i>p</i> &gt; 0.737), suggesting they may have utilized similar hip mechanics.</p>