Not according to the figures I have seen published:
"The U.S. Energy Information Administration (EIA) estimates that electricity transmission and distribution losses average about 5% of the electricity that is transmitted and distributed annually in the United States.1
1Average of annual losses in 2011 through 2015. Estimated losses in 2015 for the entire United States were about 4.7%."
Last updated: February 16, 2017
See: https://www.eia.gov/tools/faqs/faq.php?id=105&t=3