Hive has over 2 million user accounts (2,469,489 exactly as I write this), however the vast, vast majority of those have not made any transactions in months or years. Among this huge number of dormant accounts, the majority were created before the split from Steem in March 2020.
Where are all these users? The following chart was created by searching for the top locations among Hive user accounts. I then removed meaningless results, merged the top duplicates (eg. US and USA, Venezuela and Caracas etc.) until I had a top 30 without duplicates. Since I did not merge duplicates below the top 60 results, the data is not comprehensive but gives a general idea.
The chart also shows the dormancy rate - what percentage of accounts with these locations have been inactive for at least 30 days. Pretty much everywhere has a dormancy rate above 90%.
Recall that the vast majority of accounts do not have a location in their profile set, and of those that do, many are set to unidentifiable locations such as "Hive", "On the blockchain" or "The World", so these represent a small portion of all past users.
Here is the same chart in the form of a world heatmap.
It's worth noticing that pre-fork, Steem had a much larger presence in the US, Indonesia, South Korea and Bangladesh.