Which engineering stream is the most preferred by students going to US for post-graduation?

USA universities are hub of technology innovation. Most of the top Engineering universities are located in USA. Students who have studied their MS in USA have good job opportunities in all specializations subject to visa availability. You must seek admission in MS based on you academic qualification

All streams have amazing prospects it depends on what you have studied in the past and on your passions and interests. Mechanical and Chemical are very popular though.