Social isolation is a major risk factor for poor physical and mental health among older adults. This study investigates the correlates of objective social isolation among older African Americans, Black Caribbean immigrants, and non-Hispanic Whites. Methods: The analysis is based on the older subsample (n = 1,439) of the National Survey of American Life. There are eight indicators of objective social isolation: no contact with neighbors, neighborhood groups, friends, family members, religious congregation members, not being married and no romantic involvement, living alone, and not being a parent. Results: Very few older Americans are socially isolated from family and friends. Non-Hispanic Whites are more likely than both African Americans and Black Caribbeans to live alone, to be childless, and have limited contact with religious congregation members. For both African Americans and Black Caribbeans, being female is protective against social isolation, but for both populations, men are more likely to be married or have a romantic partner. For African Americans, residing in the South is also protective against social isolation. Discussion: This analysis provides greater clarity on racial and ethnic differences in social isolation among older adults, as well as within-group differences in objective social isolation among African Americans and Black Caribbeans. © 2018 The Author(s) 2018. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved.

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