Subclinical ketosis (SK) is a metabolic disease experienced by dairy cows during the transition period. It is characterized by blood concentrations of BHB ≥1.2 mmol/L. Few studies has reported the prevalence of SK in cattle under grazing conditions. In Chile, 70% of dairies are under grazing conditions with seasonal calving. The objective was to determine the prevalence of SK at 7 DIM in dairy cows calving in fall and spring. The study was conducted in a southern Chilean dairy, milking ~1,000 cows with a mature-equivalent 305-d milk yield of 7,500 kg. During prepartum, cows were housed without access to pasture and fed a TMR. After calving cows were moved to a group under grazing conditions. Cows were milked 2×, and fed a TMR (70% DM in fall, 30% DM in spring) before milking, complementing the grazing activity. During 2016, 866 cows were tested for blood BHB at 7 DIM using a hand-held device (Precision Xtra) with reported sensitivity and specificity of 94.8% and 97.5%, respectively. From this population, 234 cows calved in fall (27%; [10.7% primiparous, 89.3% multiparous]) and 632 in spring (73%; [30.9% primiparous, 69.1% multiparous]). Annual prevalence of SK at 7 DIM was 18.1%; however, the prevalence during fall was 8.1% and during spring 21.8% (P ≤ 0.05). Primiparous had a prevalence of 15.5% vs. 19.0% in multiparous (P > 0.05). Primiparous calving in fall had a prevalence of 12.0% and multiparous 7.65% (P > 0.05). Primiparous calving in spring had a prevalence of 15.9% vs. 24.5% in multiparous (P ≤ 0.05). Cows with BCS at calving ≤3.5 had a prevalence of 16.2%, vs. cows with BCS >3.5 22.5% (P ≤ 0.05). During fall, cows with BCS at calving ≤3.5 had a prevalence of 6.5%, vs. cows with BCS >3.5 18.8% (P ≤ 0.05). However, during spring, cows with low and high BCS had similar prevalence (P > 0.05; 20.3% vs 23.6%, respectively). In conclusion, the prevalence of SK at 7 DIM in Chilean grazing dairy cattle during 2016 was 18%. The prevalence was higher during spring and in multiparous. Cows calving with high BCS had a higher prevalence of SK than cows with BCS at calving ≤3.5.