Idaho Family Law Overview

By Ronald W. Brilliant, Attorney at Law · Licensed in Idaho, Nevada & California · Last reviewed: September 2026 against the Idaho Code as posted by the Idaho Legislature (July 1, 2026)

Idaho’s family laws are found in Title 32 of the Idaho Code, called “Domestic Relations.” Title 32 covers who may marry, how a marriage is licensed and performed, annulment, divorce, the property of spouses, and the rights and duties between parents and children. This overview explains what those statutes say in plain English, with a citation for each rule.

The overview is for anyone planning to marry in Idaho, thinking about ending a marriage, or dealing with custody or support of a child. It gives general information only.

Some family law topics are governed by rules outside the statutes. For example, the Idaho Code authorizes the Idaho Supreme Court to adopt child support guidelines (Idaho Code § 32-706(5)). Those guidelines are not part of the Idaho Code, so this overview does not state guideline amounts.

Topics in This Overview

• Marriage in Idaho: who may marry, age limits, prohibited marriages, the marriage license, who may perform a ceremony, and why Idaho no longer recognizes new common-law marriages.
• Annulment: the six grounds for a decree of nullity, who may ask for one, the time limits, and what happens to children.
• Divorce: residency, the grounds for divorce, defenses, the 21-day waiting period, temporary orders, and legal separation.
• Property Division and Maintenance: separate and community property, how community property is divided in a divorce, and when a court may order maintenance.
• Child Custody: the best-interests factors, joint custody, and related rules.
• Child Support: the court’s power to order support, income withholding, and related enforcement tools.
• Parent and Child: the rights and duties of parents under chapter 10 of Title 32, and the Parent Responsibility Act in chapter 13.
• De Facto Custodians and Temporary Caregivers: the De Facto Custodian Act and temporary delegation of parental powers.
• Coordinated Family Services: court assistance offices, family court services, and domestic violence courts under chapter 14 of Title 32.

Key Idaho Family Law Rules at a Glance

The table below collects some of the most-used numbers in Idaho’s family statutes. Each topic page explains the rule in more detail.

Rule	What the Idaho Code says	Citation
Age to marry without parental consent	18 or older, unmarried, and not otherwise disqualified	§ 32-202
Marriage of a 16- or 17-year-old	Needs sworn, acknowledged written consent of a parent or guardian; no license if the other party is an adult 3 or more years older	§ 32-202
Under 16	No marriage license may be issued	§ 32-202
Common-law marriage	Not recognized unless created before January 1, 1996	§ 32-201
Return of signed marriage license	Within 30 days after the ceremony	§ 32-402
Most annulment deadlines (fraud, force, physical incapacity)	4 years, counted from discovery of the fraud or from the marriage	§ 32-502
Residency to get a divorce	Plaintiff must have been an Idaho resident for 6 full weeks before filing	§ 32-701
Waiting period in a divorce	No hearing on the merits or final decree until at least 21 days after filing and service, except as the statute provides	§ 32-716
Desertion, neglect, or habitual intemperance as grounds	Must continue for 1 year	§ 32-609
Living apart as grounds	5 years or more without cohabitation	§ 32-610
Adultery claim deadline	Action must start within 2 years after the act or its discovery	§ 32-615
Child support end date	Age 18; the court may continue it while the child is in high school, up to age 19	§ 32-706

How Marriage Begins and Ends

Under the Idaho Code, marriage is a personal relation arising out of a civil contract, and consent alone is not enough (Idaho Code § 32-201(1)). The consent must be followed by a marriage license and a solemnization, meaning a ceremony performed by an authorized person (§ 32-201(1)). The marriage page explains these steps.

A marriage is dissolved only by the death of one spouse or by a court judgment granting a divorce (Idaho Code § 32-601). A divorce judgment restores the parties to the state of unmarried persons (§ 32-602). See the divorce page for the grounds and the process.

An annulment is different. It is based on a cause that existed at the time of the marriage, such as fraud, force, or a spouse who was already married (Idaho Code § 32-501). The annulment page covers each ground and its deadline.

Property of Spouses

Idaho law divides a married couple’s property into separate property and community property. Property a spouse owned before marriage, or later received by gift, bequest, devise, or descent, stays that spouse’s separate property (Idaho Code § 32-903). Other property acquired after marriage by either spouse is community property (§ 32-906(1)).

In a divorce, the court must divide the community property in proportions it deems just, and unless there are compelling reasons otherwise, the division is to be substantially equal in value, considering debts (Idaho Code § 32-712(1)). The property division and maintenance page explains the factors.

Children

In a divorce, the court may make orders for the custody, care, and education of the children as may seem necessary or proper in their best interests (Idaho Code § 32-717(1)). Unless a preponderance of the evidence shows otherwise, the law presumes that joint custody is in a child’s best interests (§ 32-717B(4)). That presumption is reversed if the court finds a parent is a habitual perpetrator of domestic violence (§ 32-717B(5)).

The court may order either or both parents to pay child support until the child is 18 (Idaho Code § 32-706(1)). If the child is still in high school after turning 18, the court may continue support until the child leaves high school or turns 19, whichever comes first (§ 32-706(2)). See the child custody and child support pages.

Which state’s courts may decide custody is governed by Idaho’s version of the Uniform Child Custody Jurisdiction and Enforcement Act, in chapter 11 of Title 32. That topic has its own Idaho child custody jurisdiction overview. Adoption and termination of parental rights are covered in the Idaho adoption overview.

How I Can Help

I help Idaho clients understand how these statutes apply to their own situation, whether they are planning a marriage, preparing a premarital agreement, weighing an annulment or divorce, or working through custody and support questions. I can review your facts, explain your options under the Idaho Code, and help you take the next step. Request a consultation to discuss your situation.

This page provides general information about Idaho family law, based on the Idaho Code, and is not legal advice. Court rules (including the Idaho Child Support Guidelines), regulations, and case law also affect family law matters. Every situation is different; consult an attorney about yours. Reading this page does not create an attorney-client relationship.