There are two main categories of family based visas available: immediate relative, and family preference. Immediate relative visas are unlimited, and issued to immediate relatives of U.S. citizens, such as children under the age of 21, spouses, and parents. Family preference visas are limited in number and are for more distant relatives of U.S. citizens. Whether you are a parent adopting a child from overseas, or have married a foreign national, these Avvo guides will tell you everything you need to know about family visas.