This study examined the effect of e-government services on the performance of the Nigeria
Immigration Service (NIS) in Adamawa State. A cross-sectional research design was adopted
to obtain data from both service providers and service users. The target population comprised
310 NIS personnel and 75,926 service users, giving a total population of 76,236. Using
Yamane’s (1967) formula at a 5% level of precision, a sample size of 398 was determined, and
an additional 10% was added to account for non-response, resulting in 438 respondents. Data
were collected through structured questionnaires, while secondary data were sourced from
official reports, policy documents, and academic literature. Instrument reliability was
confirmed using Cronbach’s Alpha with a threshold of 0.70. Quantitative data were analyzed
using descriptive statistics, Pearson correlation, and multiple regression analysis with SPSS
version 26. The findings revealed that e-government services significantly and positively
influence the performance of the NIS. Online service delivery improved accessibility and
operational efficiency (β = 0.155, p < 0.05). Electronic document processing had a strong
positive effect on performance by enhancing accuracy, security, and productivity (β = 0.648,
p < 0.05). The study concluded that digital transformation plays a critical role in enhancing
the efficiency, accountability, and overall performance of the Nigeria Immigration Service. It
recommends sustained investment in online platforms, modernization of document processing
systems, expansion of digital payment infrastructure, and strengthened inter-agency data
integration to further improve service delivery and institutional effectiveness.