What is the ratio of male to females regarding IQ 190?

The highest ever IQ is attributed to a Korean man, Kim Ung-Yong, who is reported to have achieved an average IQ of 210 (although it is not necessarily this high anymore). To answer the original question, the likely answer is that there are more men with an IQ > 190.

It is well known that, women have a lower average IQ, and men have a significantly greater standard deviation. One could say, the stupidest men are stupider than the stupidest women, but the smartest men are smarter than the smartest women. Of course, to do so would be a fallacy, not least because IQ is generally regarded as a poor measure of true intelligence.