No, Title VII doesn't mention marital status, but it can be the basis of a bias claim.

Title VII does not specifically list marital status as the grounds for a sex discrimination lawsuit. But that doesn't mean marriage cannot play a role in Title VII sex discrimination cases.

There is a case category generally referred to as "sex-plus discrimination" that can include discrimination based on a combination of the sex of the employee/applicant, plus another factor. Thus, if an employer treats married women differently than married men, the sex treated less favorably may have a sex-plus marital-status case.

Here's how that played out in a recent 3rd Circuit Court of Appeals case.

Recent case:

Charles is part-owner of an adult entertainment business, Adult World. Kymberley, who was a single mother of four when she met Charles, first worked for him...