Douglas William Dockery is an American epidemiologist and the John L. Loeb and Frances Lehman Loeb Professor of Environmental Epidemiology at the Harvard School of Public Health (HSPH).

in meteorology from the Massachusetts Institute of Technology in 1972, where he submitted a thesis titled "An Analytic Study of the Predictability of the Flow in a Dish-Pan Model of the Atmosphere".

[2] In the 1970s and 80s, Dockery led the Harvard Six Cities study, the results of which were published in 1993 in the New England Journal of Medicine.

In the study, Dockery and his co-authors (including C. Arden Pope) reported that air pollution was associated with increased mortality.

[5] In 2009, Dockery co-authored another study which found that improvements in air quality in 51 American cities had led to life expectancies of people living there increasing by as much as five months.