Federal laws. While there is no federal law that prohibits this type of discrimination in private employment, an executive order specifically outlaws discrimination based on sexual orientation in the federal government.
State laws. Seventeen states and the District of Columbia have laws that currently prohibit sexual orientation discrimination in private employment: California, Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Hampshire, New Jersey, New Mexico, New York, Rhode Island, Vermont, Washington, and Wisconsin. Some of these states also specifically prohibit discrimination based on gender identity. (In addition, six states have laws prohibiting sexual orientation discrimination in public workplaces only: Colorado, Delaware, Indiana, Michigan, Montana, and Pennsylvania.)