Objective: Data were retrieved from the Korean National Health and Nutrition Examination Surveys (2010-2019). A total of 10,365 participants aged 19-39 years with normal kidney function and without hypertension were enrolled. The participants were divided into quartile based on PP. RHF was defined as eGFR with residuals >90th percentile after adjusting for sex, age, weight, and height.  Methods: Mean age of the participants was 30.1 ± 6.1 years, and 44.9% were male.  The mean levels of PP were 27.8 ± 2.8, 33.9 ± 1.4, 38.8 ± 1.38, and 47.1±5.2 in quartile 1 to 4 respectively. The prevalence of RHF was significantly higher in higher quartiles (7.5%, 10.2%, 10.4%, and 11.6% respectively; P for trend <0.001). The association between PP and the risk for RHF was analyzed by multivariable logistic regression, the higher quartiles showed increased risks for RHF compared to lowest quartile (odds ratio [OR], 1.38; 95% confidence interval [CI], 1.14-1.67; P=0.001 in quartile 2; OR, 1.41; 95% CI, 1.16-1.72; P=0.001 in quartile 3, and OR, 1.60;95% [CI], 1.31-1.96; P<0.001 in quartile 4). When subgroup analysis was performed stratified with age, sex, body mass index (<25 or ≥ 25kg/m2), and history of diabetes, an increased risks with higher quartiles of PP for RHF was consistent regardless of subgroups. Results: Elevated levels of PP is associated with an increased risk of RHF in Korean young adults with normal kidney function. Longitudinal studies are needed to investigate whether high PP associated RHF is an early risk factor for kidney injury in young adults Conclusions: Objective: Pulse pressure (PP) is a surrogate marker of arterial stiffness. Previous studies suggest that arterial stiffness results in renal hyperfiltration (RHF). However, the association between PP and RHF is not well established in young adults. This study aimed to investigate the association between PP and RHF in Korean young adults without hypertension Methods: Data were retrieved from the Korean National Health and Nutrition Examination Surveys (2010-2019). A total of 10,365 participants aged 19-39 years with normal kidney function and without hypertension were enrolled. The participants were divided into quartile based on PP. RHF was defined as eGFR with residuals >90th percentile after adjusting for sex, age, weight, and height.  Results: Mean age of the participants was 30.1 ± 6.1 years, and 44.9% were male.  The mean levels of PP were 27.8 ± 2.8, 33.9 ± 1.4, 38.8 ± 1.38, and 47.1±5.2 in quartile 1 to 4 respectively. The prevalence of RHF was significantly higher in higher quartiles (7.5%, 10.2%, 10.4%, and 11.6% respectively; P for trend <0.001). The association between PP and the risk for RHF was analyzed by multivariable logistic regression, the higher quartiles showed increased risks for RHF compared to lowest quartile (odds ratio [OR], 1.38; 95% confidence interval [CI], 1.14-1.67; P=0.001 in quartile 2; OR, 1.41; 95% CI, 1.16-1.72; P=0.001 in quartile 3, and OR, 1.60;95% [CI], 1.31-1.96; P<0.001 in quartile 4). When subgroup analysis was performed stratified with age, sex, body mass index (<25 or ≥ 25kg/m2), and history of diabetes, an increased risks with higher quartiles of PP for RHF was consistent regardless of subgroups. Conclusions: Elevated levels of PP is associated with an increased risk of RHF in Korean young adults with normal kidney function. Longitudinal studies are needed to investigate whether high PP associated RHF is an early risk factor for kidney injury in young adults