Did Vincent van Gogh have kids?

No because he did not get married

However there were some speculations that he had a child with the prostitute he lived with, Sien (some further reading here: Wordpress.com/2013/06/05/sien-and-van-gogh-a-significant-episode-in-his-controversial-life/">http://thegirlwithgreatexpectations.Wordpress.com/2013/06/05/sien-and-van-gogh-a-significant-episode-in-his-controversial-life/ ) but they had not been acquainted long enough by the time she gave birth, so it was imposible for him to be the father.