How do I get an international divorce?

You can file for divorce in California if you meet California’s residency requirements. Either you or your spouse must have lived in: California for the last 6 months AND in the county where you plan to file the divorce for the last 3 months. Depending upon how long you have been married, if there are children, and other factors will determine exactly what paperwork you will file; however, if you meet the residency requirements, you can file the petition in California even if she is in Canada. You should speak to an attorney even if it is uncontested as there are always issues that you may encounter along the way.

Your question really does not provide enough information. Generally, if both parties are here in the U.S., then you can get divorced here.