Senepol is a Bos taurus breed of beef cattle that is well suited to the tropics. This study was conducted to evaluate growth of Senepol bull and heifer calves from birth to a year of age using calves born in spring of 2012 (n = 11 heifers and 10 bulls) and 2013 (n = 17 heifers and 16 bulls). Hip height (HHT) and BW were measured at weaning and yearling. Pelvic area (PA) of heifers and scrotal circumference (SC) of bulls were measured at yearling. Average daily gain (ADG) was calculated from birth to weaning and weaning to yearling. Data were analyzed using year and sex of calf in the model with sire as a covariate due of unequal representation of sires across years. Age of dam was not significant (P > 0.10) for any trait. There was no effect of year or sex on birth weight (P > 0.10). Bulls had a greater 205-d adjusted weaning weight (P < 0.008) than heifers (242 ± 6 vs. 217 ± 6 kg, respectively) but there was no effect of year (P > 01.0). Bulls had a greater ADG from birth to weaning than heifers (0.96 ± 0.03 vs. ± 0.83 ± 0.03 kg/d, respectively) but there was no effect of year (P > 0.10). Weaning HHT was greater (P < 0.003) in bulls than in heifers (111.5 ± 0.7 vs. 108.3 ± 0.7 cm, respectively) and greater (P < 0.002) for calves born in 2012 than in 2013 (111.9 ± 0.8 vs. 107.8 ± 0.6 cm, respectively). Bulls had a greater 365-d adjusted yearling weight (P < 0.01) than heifers (293 ± 7 vs. 268 ± 7 kg, respectively) but there was no effect of year (P > 0.10). Calves born in 2012 had lower ADG from weaning to yearling (P < 0.004) than calves born in 2013 (0.28 ± 0.02 vs. 0.37 ± 0.02 kg/d, respectively) but there was no effect of sex (P > 0.10). Bulls had greater (P < 0.0008) yearling HHT than heifers (118.8 ± 0.7 vs. 115.4 ± 0.7 cm, respectively) and calves born in 2013 had greater HHT (P < 0.0002) than those born in 2012 (118.9 ± 0.6 vs. 115.2 ± 0.7 cm, respectively). Yearling SC of bulls was not different (P > 0.10) between years (24.7 ± 1.3 vs. 24.4 ± 0.9 cm, respectively). The PA of heifers was not different (P > 0.10) between years (145.5 ± 7.7 vs. 136.4 ± 5.5 cm2, respectively). These data show that there are differences in the growth traits between Senepol bull and heifer calves reared under tropical conditions.