This is what I could come up with off the top of my head, without looking anything up...
Sweden's capital is Stockholm.
It is a long country oriented north-south that occupies the western side of the Scandinavian peninsula, bordering mostly Norway and a bit of Finland.
The Swedish flag features a left-of-center cross, yellow on a field of blue.
Politics are also left-of-center. I think it's a social democracy with a king as its head of state. His name is probably Gustav but it may be Olaf. It has an effective criminal justice system that focuses on rehabilitation.
Its currency is the Swedish kronur (spelling?). SKK? [Thank you, Carmen Sandiego.]
You primarily speak Swedish. It's similar to the languages spoken in your neighboring countries and they may be mutually-comprehensible but they somehow aren't considered dialects of the same language. The writing has a lot of crossed-out 0s and "regular" letters with circles above them.
It hosted a Winter Olympics once (perhaps that's where Lillehammer is located). Regardless, its athletes excel at all winter sports, especially the Nordic ones (obviously). Several Swedes play in the NHL but I can't think of their names at the moment. They also produced a good tennis player a few years back named Jonas Bjorkman.
It is home to a homogenous population of invariably tall, fit, blue-eyed, sexually liberated people of both sexes.
The original Girl With The Dragon Tattoo is Swedish.
(Forget the Lillehammer thing. The more I think of it, the more Norwegian it sounds.)
It has a well-developed rail system that even connects with Denmark over a cool-looking bridge. A temporarily-popular state-owned TV station showed a train traveling the country for several days straight. The same channel did something similar with a ferry crossing too.
You all drink copious amounts of vodka to deal with the frigid year-long winter. One such brand is Svedka. Assorted homemade schnapps called acquavit are also popular.
You actually have reindeer and you occasionally eat them.
IKEA! How could I forget that? Minimalist arts too.
You eat meatballs, smoked salmon, and a variety of herring-based sauces and creams. (I'm basing this on what they sell at IKEA.)
You probably listen to death metal.