This study analyzes the effect of Digital Population Identity (IKD) implementation on public service quality at the Department of Population and Civil Registration of West Bangka Regency, with user satisfaction as a mediating variable. A quantitative approach with causal-explanatory design was applied using Structural Equation Modeling – Partial Least Squares (SEM-PLS) via SmartPLS 4. The sample consisted of 100 active IKD users selected through purposive sampling. Outer model evaluation confirmed validity (outer loading > 0.70) and reliability (CR > 0.70; AVE > 0.50; HTMT < 0.85) of all indicators. Inner model results demonstrated: (1) IKD implementation positively and significantly affects user satisfaction (β = 0.623; t = 8.214; p < 0.05); (2) user satisfaction positively and significantly affects public service quality (β = 0.541; t = 6.847; p < 0.05); (3) IKD implementation directly and significantly affects public service quality (β = 0.312; t = 3.924; p < 0.05); and (4) user satisfaction partially mediates the effect of IKD implementation on public service quality (indirect effect = 0.337; 95% CI: 0.218–0.461). The R² of public service quality (0.712) indicates strong explanatory power. These findings underscore the importance of enhancing user satisfaction as a key strategy in the digitalization of civil registration services.
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