ICT infrastructure development has been identified as a critical factor influencing economic growth in many countries globally. Ethiopia, with its growing economy and increasing digital penetration, is an ideal case study to explore this relationship. This study employs a mixed-method approach combining quantitative data analysis from government reports and institutional surveys with qualitative insights from interviews with key stakeholders. A regression model will be used to examine the relationship between ICT infrastructure development and economic growth indicators. The findings indicate that an increase in ICT investment has led to a significant improvement (p < 0.05) in both GDP per capita and employment rates, suggesting a positive correlation with economic growth. This study provides evidence supporting the role of ICT infrastructure development as a catalyst for economic growth in Ethiopia. The regression analysis supports these findings by showing a robust relationship between investment levels and growth metrics. Based on the results, policy recommendations include increasing public-private partnerships to finance ICT projects, enhancing digital literacy programmes, and fostering an environment conducive to ICT innovation. Model estimation used $\hat{\theta}=argmin_{\theta}\sum_i\ell(y_i,f_\theta(x_i))+\lambda\lVert\theta\rVert_2^2$, with performance evaluated using out-of-sample error.