Abstract Introduction Distal transradial catheterization (dTRA) has emerged as a viable alternative to conventional transradial access for various interventional procedures. Purpose This study aims to identify the risk factors associated with access site-related complications following dTRA. Methods A total of 4,977 patients who underwent dTRA were included in this retrospective study. The patients were divided into two groups based on the occurrence of access site-related complications: Complication(+) group (n=272) and Complication(-) group (n=4,705). Various demographic, clinical, and procedural parameters were analyzed to identify potential risk factors. Univariate and multivariate logistic regression models were employed to determine the adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for each risk factor. Results The Complication(+) group exhibited a higher prevalence of male gender (53.7% vs. 68.4%, p<0.001), older age (68.140 ± 11.46 vs. 66.33 ± 11.90, p=0.014), lower body mass index (BMI) (24.35 ± 3.54 vs. 24.97 ± 3.55, p=0.005), larger sheath size (2.45 ± 0.24 vs. 2.40 ± 0.24, p<0.001), increased serum creatinine (Cr) levels (1.33 ± 1.76 vs. 1.10 ± 1.46, p=0.013), longer access time (209.26 ± 237.72 vs. 149.26 ± 143.98, p<0.001), prolonged hemostasis time (257.64 ± 202.40 vs. 197.60 ± 133.39, p<0.001), and extended procedure time (32.24 ± 29.07 vs. 23.04 ± 26.19, p<0.001). Additionally, the Complication(+) group received higher heparin doses (6275.48 ± 2971.05 vs. 5282.74 ± 2952.31, p<0.001) and had a higher incidence of multiple antiplatelet therapy (73.2% vs. 51.3%, p<0.001). However, no significant differences were observed in hypertension, dyslipidemia, diabetes mellitus, or smoking history between the two groups. The multivariate analysis identified male gender (adjusted OR: 2.073, 95% CI: 1.376 - 3.123, p<0.001), and increased Cr levels (adjusted OR: 1.083, 95% CI: 1.024 - 1.144, p=0.005) as independent risk factors for access site-related complications after dTRA. Moreover, the use of multiple antiplatelet therapy was found to be significantly associated with an increased risk of complications (adjusted OR: 1.948, 95% CI: 1.420 - 2.671, p<0.001). Conclusion In patients undergoing dTRA, male gender, increased serum creatinine levels, and the use of multiple antiplatelet therapy were identified as independent risk factors for access site-related complications. These findings highlight the importance of careful patient selection and procedural optimization to minimize complications during dTRA.