Our objective was to determine the maximum inclusion rate of reduced-fat distillers dried grains (RFDDGS) in dairy heifer rations. A 16-wk randomized complete block design study was conducted using 48 Holstein heifers (199 ± 2 d of age) to evaluate effects of diet on growth performance. Treatments were 30% RFDDGS (30DG), 40% RFDDGS (40DG), and 50% RFDDGS (50DG) with the rest of the diets consisting of grass hay and 1.5% mineral mix. Using Calan gates rations were limit-fed at 2.65, 2.50, and 2.35% of BW (DM basis) for 30DG, 40DG, and 50DG, respectively to have similar intakes of CP and energy among treatments. Frame sizes, BW, and BCS were measured on 2 consecutive days during wk 0, 2, 4, 6, 8, 10, 12, 14, and 16 of the feeding period. Data were analyzed using the MIXED procedures with repeated measures in SAS 9.4. Changes per day were analyzed by regression analysis. There were no interactions of treatment by wk. Heifer DMI linearly decreased (P < 0.01) with increased dietary concentrations of RFDDGS (6.49, 6.21, and 5.84 kg/d; SEM = 0.117 for 30DG, 40DG, and 50DG, respectively). Body weights (264.1, 266.2, and 266.4 kg; SEM = 4.98) and ADG (0.89, 0.94, and 0.97 ± 0.083 kg/d) were similar (P > 0.05) among treatments. Gain to feed (0.14, 0.16, and 0.18 kg; SEM = 0.0034) linearly increased (P < 0.01). Hip height (124.8, 124.7, and 124.8 cm; SEM = 0.36) and hip width (35.6, 35.8, and 35.8 cm; SEM = 0.57) were similar (P > 0.05) among treatments. Body length (112.5, 112.9, and 113.1 cm; SEM = 0.18) tended (P = 0.06) to linearly increase across treatments. There was a quadratic effect (P < 0.05) for withers height (120.9, 121.7, and 121.6 cm; SEM = 0.29), paunch girth (172.5, 173.9, and 172.5 cm; SEM = 1.29), and BCS (3.11, 3.12, and 3.07; SEM = 0.018), and a quadratic tendency (P = 0.08) for heart girth (140.9, 140.6, and 140.9 cm; SEM = 0.41). Limit-feeding diets with greater inclusion rates of RFDDGS resulted in improved gain to feed ratios and maintained frame growth without increasing BCS, demonstrating that replacing forage with RFDDGS does not negatively affect heifer growth performance.