Правовые аспекты опеки над детьми и порядок определения места жительства несовершеннолетних.

Child custody, conservatorship and guardianship describe the legal and practical relationship between a parent and the parent's child, such as the right of the parent to make decisions for the child, and the parent's duty to care for the child. Custody issues typically arise in proceedings involving divorce, as well as in paternity, annulment, and other legal proceedings in which children are involved. In most jurisdictions the issue of with which parent the child will reside is determined in accordance the best interests of the child standard. In rare cases custody may be awarded to somebody other than a parent, but only after the fundamental right afforded to biological parent's has been overcome or where the third party has an established role that is in the manner of a parent. When a child's parents are not married it is necessary to establish paternity before issues of child custody or support may be determined by a court. Family law proceedings that involve issues of custody and visitation often generate the most acrimonious disputes. In extreme cases, one parent may accuse the other of trying to "turn" the child(ren) against him or her, allege some form of emotional, physical, or even sexual abuse by the other parent, the "residential" parent may disrupt the other parent's contact or communication with the child(ren), or a parent may remove the child from the jurisdiction in violation of court orders, so as to frustrate the other parent's contact with the children. Courts and legal professionals within the U. S. may use terms such as "parenting time" instead of custody and visitation. The goal of the newer, alternative terminology is to eliminate the distinction between custodial and noncustodial parents, and to better focus on the best interests of the children by crafting schedules that meet the developmental needs of the children. For example, small children may need shorter, more frequent time with parents, whereas older children and teenagers can tolerate and may demand less frequent shifts, but longer blocks of time with each parent.

In the decades leading up to the 1970s child custody battles were rare, and in most cases the mother of minor children would receive custody. Since the 1970s, as custody laws have been made gender neutral, contested custody cases have increased as have cases in which the children are placed in the primary custody of the father. Children under the age of 18 must be supported by both parents to the extent that they are able to support the children under the provisions of the Child Support Standards Act.

New Jersey courts require all divorcing parents with minor children to complete a mandatory Parents' Education Program before granting a divorce per the Parent's Education Act. The law, , enacted in 1999, was established to promote cooperation between the parties and to assist in resolving issues that arrive during the divorce process that may impact a child. However, courts will not refer a party to the program if a restraining order has been issued pursuant to the Prevention of Domestic Violence Act or if either party is restrained from contact under the criminal or civil laws of New Jersey or any other state.

In Troxel v. Granville (2000), the U. S. Supreme Court affirmed that a biological parent holds a fundamental right in choosing how to raise one's children as they see fit, and that right includes limiting the children’s access to their grandparents. In In re O'Donnell Lamont (2004), the Oregon Supreme Court affirmed an Oregon statute requiring a presumption the parent acts in the child's best interests to be met prior to applying the best interests of the child standard, placing both parties on equal footing. Likewise, the court upheld the requirement set forth mandating that either a child parent relationship or a long term personal relationship existed between the child and non blood related intervenor under the concept of the fundamental right of the parent. The court noted that the issue in itself allowed for an intervenor with a legitimate purpose to come forth, and through the statute's requirement of first showing the relationship, second showing the rebuttal of the presumption, and finally judging the choice on the best interest of the child standard, the fundamental right of the parent was being given proper Due Process Requirements under the 14th Amendment Due Process Clause.

In the 21st century, a new body of case law for custody of children in military families is developing due to more frequent deployments of both mothers and fathers in active duty, as well as dual career military couples.

Following ratification of the United Nations Convention on the Rights of the Child in most countries other than the United States (which has not ratified the convention), terms such as "custody" and "access" (known as "visitation" in the United States) have been superseded in many countries by the concepts of "residence" and "contact". Instead of a parent having "custody" of or "access" to a child, a child is now said to "reside" or have "contact" with a parent. For a discussion of the new international standards, see parental responsibility.