If I file for a divorce will I lose my permanent resident visa?

A foreign national's divorce from a U.S. citizen does not trigger loss of Permanent Resident status, even if the foreign national became a Permanent Resident through a marriage-based immigration application. More information is needed in order to provide an analysis of any steps that may be necessary or useful in connection with maintaining Permanent Resident status following a divorce. It would be wise for you to consult with a domestic relations/divorce attorney to address your rights and obligations in connection with a divorce, and to consult with an immigration attorney about immigration-related considerations.