The United States of America is being the top country by rail lines in the world. As of 2014, rail lines in the United States of America was 228,218 km that accounts for 23.40 % of the world's rail lines. The top 5 countries (others are Russian Federation, China, India, and Canada) account for 51.11 % of it. The world's total rail lines was estimated at 975,270 km in 2014.
Rail lines are the length of railway route available for train service, irrespective of the number of parallel tracks.