Oslo's crime rate is low and should not be a major concern for travelers. If you take commonsense precautions, you should be safe in most parts of the city. One area to avoid is the triangle formed by the Central Station, Hotel Opera and Oslo Spectrum. It has become notorious as a hangout for drug addicts and pickpockets. Although it could hardly be described as dangerous, the area is best avoided altogether. Try not to wind up in the lower part of Akerselva either, especially after dark. You can safely walk up the river to Mariadalsvannet, but be sure to stay beside the river at the top of Grunnerlokka. Also, the lower part of Karl Johans gate tends to get a little rowdy late at night, especially during the weekend. Avoid the area between Johans gate and the lower part of Akershus Castle (the red-light district) after working hours. It's more unsavory than dangerous. Do not leave valuables in your car, as theft is a certain problem in Oslo.
Be aware that Norway has very strict alcohol and drug laws, and the maximum blood-alcohol level is significantly lower than in other countries.
For the latest information, contact your country's travel-advisory agency.
Dos & Don'ts
Don't use the name "Lapp" or "Laplander" for the Sami people—they find it derogatory.
Don't be surprised if someone whizzes past you on a bicycle on the sidewalk, as the law allows this.
Don't be tempted to jump the often long taxi line late at night—this will most definitely fire up a normally easygoing Norwegian.
Do take your shoes off when entering the home of a Norwegian friend. It is considered correct behavior, especially in the wet and winter seasons.
Do take your kids to Norway. The country prides itself for being children friendly (barnevennlig in Norwegian). Most Oslo restaurants have special menus for children that include fruity milk shakes, and even walking tracks in the forests are suited for buggies.
Don't order a bottle of mineral water in a Norwegian restaurant. It's expensive, and tap water is served free—without any raised eyebrows—and is usually of better quality.
Don't litter. Norwegians are especially conscientious when it comes to keeping their land clean.