To find a vital record from Mercer County, New Jersey, pay a quick visit to the State of New Jersey Department of Health and Senior Services website. There, youll find information on how to obtain death certificates, birth certificates, marriage certificates, and divorce decrees. Visit the website for more information on how to place a new order or follow up on a previous request. You can choose between ordering a certified copy (with the raised seal of the office on official State of New Jersey paper) or a certification copy. It's on plain paper and cannot be used for legal purposes. A certification copy is a useful tool for people doing genealogy and mapping family trees.