This article applied the input-out table (IO) analysis to estimate the linkages of ICT sectors to the Vietnam economy. In this article, the shared output requirement of ICT sectors is analysed to the multiplier effect, inter-sector feedback effect, and spillover effect. The research also examines the induced increase of ICT's output to the final demand of ICT sectors and non-ICT sectors. The results show that although the impact of the domestic ICT sectors in the Vietnam economy increases through time, it is generally not outstanding in comparison with other sectors. The ICT manufacturing sector is rather self-sufficient, stimulating import rather than added value for the domestic economy. From both the intermediate and final demand inducement, ICT media, content and ICT services sectors reveal their significant diffusion and critical inter-sector relationship with other ICT and non-ICT sectors in the economy. The paper also provides policy implications for the future development of ICT in Vietnam