Social security, tax benefits, death benefits (including child custody), health insurance coverage, legal (marital communications privilege) There are probably

Social security, tax benefits, death benefits (including child custody), health insurance coverage, legal (marital communications privilege) There are probably thousands of these baked into our state and federal laws. Check out https://en.wikipedia.org/wiki/Rights_and_responsibilities_of_marriages_in_the_United_States#Rights_and_benefits https://en.wikipedia.org/wiki/Rights_and_responsibilities_of... and http://www.nolo.com/legal-encyclopedia/marriage-rights-benefits-30190.html http://www.nolo.com/legal-encyclopedia/marriage-rights-benef...