I'm from Spain, it's not uncommon unfortunately, but that's because the flag is appropriated by the right and far right and if you see someone with one you can be 90% sure of the type (homophobe, anti abortion, bullfighting supporter, climate change denier, etc etc)

I am from Germany and no one is raising a flag. Except he is a Nazi. Or it is soccer World Championship.

I am from India. It was illegal to fly the flag untill a decade ago. It took a supreme court verdict to get the right to fly the flag in private residences. So it is not common at all. You would see government buildings and some schools hoist the flag every day. In my school it was every Friday. I have walked around suburbs in US and almost every house had a flag in their porch. Very big ones too.

Austria: not often and I like that. Not a fan of nationalism, so the less visible this is in my life the better. I see flags IRL mainly on government functions and when right wingers parade around, maybe also near football matches, that‘s about it.

I‘d like to think the history with Nazis made it less popular, but the actual amount of far-right voters makes me think I might just live in a happy little bubble and I’d be shocked if I looked into people‘s cellars.

In Scotland, it tends to indicate your political beliefs. People flying the Union Jack are normally unionists and supporters of the monarchy, whereas people flying the Saltire (Scottish) flag are normally nationalists (pro-independence). It's therefore difficult to fly a flag 'neutrally' unless you were to fly both.

Australian here. Outside of official government uses, it's generally a sign that someone is a racist fuckwit.

It's weirdly common in Denmark. People fly the national flag for birthdays, and some people even decorate the Christmas tree with flag guirlandes. It's seen as an act of celebration rather than patriotism.

https://tenor.com/bRmME.gif

Canada here, not very common until you get close to Canada day or Armistice day. Recently though; there have been people flying it a lot and they mostly seem to be the conspiracy/queen of Canada types.

So yes, it is unusual. Perhaps it can be seen as a symptom of American nationalism, and all the pitfalls it represents.

Northern Germany here. The German flag is usually only flown at government or other public buildings or, as another commenter said, when there's a special occasion such as an international football match.

Something a bit more common up here seems to be flying the state flag (blue, white and red), which can be seen in private gardens or on some residential buildings.

Australia: Very unusual. I'll see someone doing it maybe once a month and always think "fucking weirdos". It's more common to see Aboriginal flags, but still uncommon

It's more common to see bogans using it as part or their beach or BBQ attire (eg, maybe an Australian flag stubby cooler)

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My country is a former colony of an imperial power so it's flown all the time to reinforce our feeling of sovereignty

Pretty funny that coming from a Norwegian because they still have the flag out many places in my opinion :)
It's actually one of the things that stuck out the most after I had moved there.
Especially at "hytter" (vacation cabins) I think the majority has a flag out.
Same for national day, you'll see a bunch of flags.

Compare that to Belgium, where I'm from. Even on national day it's a rare sight to see a flag.
And it's only very fanatic people that will actually wave it around on the street.

The moment you'll see most flags out is probably during the world cup.

German here. No, we don't do that here. (Exceptions: Football World Cup and weird dudes on camp sites or allotment gardens. Usually a sign to avoid the area.) Interestingly, the fascists don't show the German flag, but the one from the Germany before the current one...

Very common in Mexico during September. Otherwise not that common but also not frowned upon. There's no signficance behind it.

I'm in Canada and would say it's not extremely common, but enough so that I wouldn't think twice if I saw the flag on a house. Maybe one in fifty houses has one.

Sometimes it's on clothing too, but nowhere close to the extent that I've seen the American flag on everything when I've visited. You guys seem to really really like your flag!

We also have provincial flags which people will put on their houses, but the one I see most is for Newfoundland and Labrador, which is a different province than mine. It's arguably close to as common as the Canadian flag.