In most cases, yes — if you convert and your spouse remains non-Muslim, many scholars hold that the marriage generally continues, particularly when the spouse is from among the People of the Book (Christian or Jewish) or when both of you convert together, since Islam doesn't automatically dissolve an existing marriage the instant one partner accepts faith. The situation becomes more nuanced case by case — for example, some scholars discuss a waiting period or review if the non-Muslim spouse practices a religion outside those categories — so this is genuinely worth a direct conversation with a knowledgeable, trustworthy scholar or imam who can walk through your specific circumstances rather than relying on a generic answer. The Quran addresses shifting marital ties around conversion directly, showing that Allah anticipated exactly this kind of situation arising as people accepted Islam at different times within the same household. Try not to panic or make sudden decisions about your marriage based on assumptions — get personalized guidance, be patient with your spouse if they're not on the same page yet, and continue treating them with the fairness Islam asks of you regardless of the outcome.
Q&A · New Muslim
Is my marriage from before I converted still valid in Islam?
References
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.