Is My Mother's Cousin My Mahram?
Question

I would like to ask whether the first cousin of my mom is a mahram for me or not.
Praise be to Allah.Your mother’s cousin is not a Mahram for your mother, let alone for you. It is permissible for him to marry you, as you are not a Mahram for him. Among the conditions of Mahram is that it should be permanently forbidden for you to marry him.
For more details, please see the following answers: 5538, 104805, 217, 34791, 65925, 45970.
And Allah knows best.