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Family

How Do I Start a Divorce in Ontario and What Do I File First?

TSL Written by the Treadstone Law Team· Updated November 6, 2026

To start a divorce in Ontario, one spouse must have been habitually resident in Ontario for at least one year immediately before the case is started. The only ground is breakdown of the marriage, the other spouse does not have to consent, and no minimum length of marriage is required.

Breakdown is usually proved by living separate and apart for at least one year, and you must already be living apart when you start. You can then apply on your own, naming your spouse as respondent, or file a joint application with no respondent. Divorces are dealt with only by the Superior Court of Justice, including its Family Court branch. Before you file, gather your marriage certificate and details of any earlier divorce, because the court needs the marriage certificate and a Central Registry report on earlier cases, although it can grant the divorce without the original certificate if it accepts the explanation in your Form 36 affidavit.

A simple or joint divorce can be filed online. Your own situation, such as children, support or property claims, adds further steps, so it is worth confirming with a lawyer before you file.

Key takeaways

  • One spouse must have been habitually resident in Ontario for at least one year before the case starts.
  • The only ground is breakdown of the marriage, usually shown by one year of living separate and apart.
  • You can apply alone or file a joint application with your spouse.
  • Divorce claims go to the Superior Court of Justice, not the Ontario Court of Justice.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone family lawyer can help.

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Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

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