Is it Halal to marry a woman who is not virgin?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

Marrying a non-virgin woman is permissible. There is no evidence to prohibit doing so. Allah Says (what means): {Perhaps his Lord, if he divorced you [all], would substitute for him wives better than you - submitting [to Allah], believing, devoutly obedient, repentant, worshipping, and traveling - [ones] previously married and virgins.} [Quran 66:5]

All the wives of the Prophet Muhammad were non-virgins at the time of their marriage to him except ‘Aa’ishah .

However, the Prophet urged people to marry virgins, but it is not a general rule. Sometimes marrying a non-virgin is more beneficial than marrying a virgin.

Allah knows best.