The Seattle Longitudinal Study has been funded by grants from the National Institute of Child Health and Human Development (HD 00367, 1963-65; HD-04476, 1970-73) and by the National Institute on Aging (AG00480, 1973-79; AG03544, 1982-86; AG04770, 1984-89; R37 AG08055, 1989-2006).  Currently funded is a project to make anonymous data sets from the study available to other researchers (AG R13 AG009787, 2006-08).

The Midlife study, which continues the Seattle Longitudinal Study, has been funded by a grant from the National Institute on Aging (AG024102, 2006-2010). In this study, 1207 participants in the SLS were assessed once more in an eighth wave, picking up where the SLS left off.