Facilities for study and research in the offices of the United States government at Washington

Hadley is a both a surname and a given name that is a transferred use of a place name of English origin that means “heather field.” The name has increased in popularity in recent years for girls in the United States and has ranked among the top 200 names used for American girls since 2011. Spelling variants such as Hadlee and Hadleigh are also in wide use.