It's very possible. The data I was looking at for this was a couple years out of date. I started looking at "population pyramids" last night researching where the 25-35 demographics was less gender skewed. https://worldpopulationreview.com/us-cities/san-francisco-ca-population SF is very badly skewed.
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Wow, Seattle looks kinda fucked gender-balance-wise too. Portland seems actually balanced, NYC was female slanted. What was interesting was a place like Simi Valley https://worldpopulationreview.com/us-cities/simi-valley-ca-population where the overall ratio is balanced, but the 25-35 demo is off.