Women's contributions to family income are essential for most families. This is obviously true for the growing number of single-mother families, but increasingly so for married couple families. While dual-earner families are doing relatively well, family income overall has been stagnant or decreasing among single-earner families, resulting in a widening income gap. This study provides an examination of married and single women's contributions to family income. Single women are comprised of those who are cohabiting, in same sex marriages, living alone, with parents or other family members, or living with roommates. In this brief, we consider family income for all single and married women. In the case that single women live alone or with nonrelatives, family income is comprised of the woman's income.