Prevalence of Autism Spectrum Disorder in the United States is likely to be higher than the most recent CDC estimate of 1 in 68 children (14.6/1,000 children or 1.46%). 
According to the National Health Interview Survey in 2014 conducted by the National Center for Health Statistics, 1 in 45 children (22.4/1,000 children or 2.24%) in the US has Autism Spectrum Disorder (ASD). 
According to the National Survey of Children’s Health in 2011-12 conducted by the National Center for Health Statistics, 1 in 50 children (20/1,000 children or 2%) in the US has Autism Spectrum Disorder (ASD). 
Over 3.5 million Americans live with an autism spectrum disorder.  In other words, almost 3% of the 125 million US households are affected by autism.
Autism is the fastest-growing developmental & disabling disability.  More children are afflicted with autism than AIDS, diabetes, Downs and cancer combined.  Yet, autism receives less than 5% of the research funding of many less prevalent childhood diseases, despite it being the fastest-growing developmental disability in the United States.