The primary aim of this study is to identify the characteristics of the students' profiles regarding information and communications technology (ICT) use and their relations to background, motivational factors, and academic achievement. A sample of 4,838 U.S. students from PISA 2018 data was used. Latent profile analysis on KT use for different purposes at different settings identified two distinct student subgroups. Logistic regression revealed that perceived ICT competence, gender, and SES predicted students' profile membership. Linear regression showed that students who use KT moderately across all aspects performed better academically than the students who use KT heavily for entertainment. Our study shows the need to investigate ICT use at a finer granularity to better distinguish different types of ICT use and to provide insights into characteristics of the U.S. students' subgroups.