Louisiana - Civil Code 1808, page 24, article 8: "Free persons and slaves are incapable of contracting marriage together; the celebration of such marriages is forbidden, and the marriage is void; it is the same with respect to the marriages contracted by free white persons with free people of color."
Ohio - Law forbids intermarriage between a person of pure white blood and a person having a visible mixture of African blood.
Scott v. Georgia, Georgia Supreme Court indicted a black woman, Charlotte Scott, for "cohabitating and having sexual intercourse" with a white man, Leopold David, although they claimed to be married by a black preacher. Ruling argued: “The amalgamation of the races is not only unnatural, but is always productive of deplorable results. Our daily observation shows us, that the off-spring of these unnatural connections are generally sickly and effeminate, and that they are inferior in physical development and strength, to the full-blood of either race. ...Such connections never elevate the inferior race to the position of the superior, but they bring down the superior to that of the inferior. They are productive of evil, and evil only, without any corresponding good."
Pace v. Alabama. Court convicted Tony Pace, a black man, and Mary Jane Cox, a white woman, under Section 4189, for “living together in a state of adultery or fornication.” Each received 2 years in a state penitentiary – the shortest sentence permissible by law. Alabama Supreme Court upheld the convictions because they were both given equal treatment. U.S. Supreme Court upheld the decision.
California - CA Civil Code, Section 60 prohibiting marriages between white persons and “Negroes or Mulattoes.”