Hah! I once did essentially what this page does, albeit in SQLite with one of those SQL workbench apps. The data was pulled from US census data. Kind of a fun little project. I wish I had my laptop with me (currently backpacking through Europe) because I remember there were some interesting little insights I came across. For instance, I think I remember there was some weird town in the middle of nowhere in California where the residents are almost entirely 50+ women. I also remember Port Hueneme being heavily skewed towards men. It was also interesting seeing how the gender ratio could change significantly between neighborhoods and towns in the same city.

The truth is I came up with this a few years ago because I wanted to try living in a different city and wanted to make sure it didn't have a worse gender ratio than the one I'd been living in. I'm a man so it made sense to find one that has more women than men. I know some people find it weird to use statistics for dating purposes. Well, I can't seem to not be a weird person no matter how hard I try, so I'll just own it. Anyhow, one thing that my project did that this one doesn't seem to is break down the numbers by people who are unmarried vs married, education levels, etc. It also included corrections based on data from Gallup in regards to what percentage of single people are interested in dating vs wanting to remain single. I remember there were some cases where a place looked like a sea of women but if I adjusted the numbers to exclude married people then the resulting gender ratios were way less skewed.

Ultimately, I think culture matters more than gender ratios. I'm not gonna say where it was that I was loving for a while (which was influenced by my analysis), but I will say that I in part chose it for having a highly educated population; I found that I was definitely judged harshly for being a self taught person with no degree. Where I'm from very few people care that much. My point being you can move somewhere with lots more single women than men and end up no more successful at dating, if not less.

> I remember there were some cases where a place looked like a sea of women but if I adjusted the numbers to exclude married people then the resulting gender ratios were way less skewed.

Isn't there a married man for every married woman, meaning that the gender ratio of single people shouldn't be affected by the marriage numbers? I guess the only explanation would be that there's lots of women aged 30-34 married to men 35-39 in a given county?

> It also included corrections based on data from Gallup in regards to what percentage of single people are interested in dating vs wanting to remain single

There isn't granular data for this question, unfortunately - and the estimates vary widely from survey to survey. If you know of a data source that can provide at-least state level data for this, let me know!