National Center on Sleep Disorders Research
The National Center on Sleep Disorders Research (NCSDR), located within the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health (NIH), was established in 1993 to combat a serious public health concern. The Center seeks to fulfill its goal of improving the health of Americans by serving four key functions: research, training, technology transfer, and coordination.

National Sleep Foundation
The National Sleep Foundation (NSF) is an independent nonprofit organization dedicated to improving public health and safety by achieving understanding of sleep and sleep disorders, and by supporting education, sleep-related research, and advocacy.

Sleep Net
Everything you wanted to know about sleep but were too tired to ask, Sleep Net is an educational, non-commercial site devoted to improving sleep health worldwide.

Sleep Leaders
Sleeping disorder information and continuing medical education for sleep professionals