Dildo, Newfoundland, Canada: 803 people as of 2021.

Someone here mentioned Vulcan, Alberta - however given the qualifiers of country and size, its 1769 people disqualifies it.

Also, though I am a Trekkie myself and know that Vulcan is well known in those circles, it's virtually unheard of outside them.

Meanwhile, Dildo:

https://www.cbc.ca/news/canada/newfoundland-labrador/odd-stories-of-2019-1.5389442

The New Orleans French Quarter is easy to spot.

Forks, Washington population of ~7000 made very notable due to the twilight series. Or Astoria, Oregon population of ~10,000 made famous by the Goonies.

Byron bay. Bundaberg. Coon.

Pueblo, CO from tv commercials or maybe Walla Walla, WA from Bugs Bunny.

Fucking, Austria. Population of around 100 People. They renamed it to Fugging a few years ago

Winnipeg, Canada (pop. 850k) has a famous namesake in Winnie the Pooh (who was named after Winnipeg) and has been in the Simpsons.

The Simpsons - That's it, back to Winnipeg!

Here in Illinois is Woodstock, at ~25,600 (2020 per Wikipedia). It was the town where Groundhog Day was filmed. There's even some small road signs here and there mentioning it for the rare tourist who comes to see it. Smallest place in the state I can think of, though there's smaller towns that have been used for movies.

Some upcoming off-brand Hallmark x-mas movie will feature local tourist trap town Long Grove IL, pop ~ 8,300 (2020 per Wikipedia). The director grew up near there so knew about it and thought it'd be perfect for his movie.

Well, Brazil is such a huge country and there are lots of smallest cities with still huge population.

Unfornately i would have to say that the smallest one and most famous would probably be because of some recent disaster and one I can remember is Brumadinho. Less than 40k people, a city destroyed after a dam collapsed and a lot of mud flooded everywhere, 5 years ago

Vulcan, Alberta.

Famous because of a spaceship that landed there once, I think.

Some people with pointed ears may have also been involved, but I would replicate that with a grain of salt. I haven't really looked into it.

In Slovenia I believe Sevnica (4.5k population) - home town of Melania Trump - would be the smallest most recognizable place by the world.

But Slovenia is small enough even Kostanjevica na Krki with 802 or Vače with 421 population is easily recognizable by Slovenians.

For foreigners, probably Abbottabad (population: 275,890) due to being the site of Osama Bin Laden's compound.

For Pakistanis themselves, it's a bit harder to determine, as I'm not able to find reliable population statistics for smaller settlements. However, some contenders are probably Nathia Gali, Chitral, Skardu and Ziarat. All of these towns are in the northern mountainous regions of Pakistan, which don't have as much population density as e.g. the plains of Punjab. They're also fairly popular tourist destinations for Pakistanis who want to take a break from the heat. Ziarat could be especially famous, as Muhammad Ali Jinnah (founder of Pakistan) spent some of his last days in a cottage there. It even appears on the 100-rupee note.