alt Hacker NewsMostly an US audience here.
I don't think mostly is true? Obviously it depends a lot on the time of day, but there are also a lot of Europeans on the site. Also, most comments here seem to be critical towards current US policy. So, I think there is quite a lot of manipulation going on, since the downvoting/flagging does not really match the comment section.
I think it's true. There is a significant audience here from other areas but this being an english language forum and one focused on tech means that the US is always going to have a dominant presence[1]. The US dominance also means that the news is highly focused on US events when it wanders out of tech which further reinforced the audience.
1. I believe Canada does have an outsized presence though!