This study compares happiness in the relationship, support, and strain in LAT (living apart together, i.e., noncohabiting) relationships with first marriages, remarriages, and cohabitation among older adults in the United States. The study also asks whether partner’s health affects relationship quality differently in different relationship types. This study draws on the first wave of the National Social Life Health & Aging Project 2005-2006, (n = 1992). Partner’s physical and mental health are good predictors of relationship quality and their effects do not differ by relationship type. Men are more likely to be very happy in their relationship and to receive high support than women, but they also report more strain. LAT relationships are less likely to be very happy and to have high support than marriage and remarriage, but they also have lower strain. Different interpretations of “strain” are discussed.