  Norway has a large amount of dialectal variation, as well as a general
tolerance to its use in the public sphere. There are, however, few available
resources to study this variation and its change over time and in more informal
areas, \eg on social media. In this paper, we propose a first step to creating
a corpus of dialectal variation of written Norwegian. We collect a small corpus
of tweets and manually annotate them as Bokm{\aa}l, Nynorsk, any dialect, or a
mix. We further perform preliminary experiments with state-of-the-art models,
as well as an analysis of the data to expand this corpus in the future.
Finally, we make the annotations and models available for future work.
