In this corpus-based study, we explore how the similarity of Low Saxon dialectsamong each other and to the state languages Dutch and German has changed fromthe 19th century to today. In particular, we want to investigate if the traditionalclassification into an eastern and a western group is visible in the data and if theLow Saxon dialects can be found to diverge at the Dutch-German border. We apply principal component analysis and hierarchical clustering to n-grams ofcharacters, part of speech tags and morphological features and observe divergentdevelopments at the separate levels. As a reflection of different orthographic traditions, a noticeable distance between Dutch Low Saxon and German Low Saxon canbe attested at the character level. At the PoS and morphological level, we howeverfind a particular closeness between Dutch Low Saxon and the northern dialectsfrom Germany, while we see German Westphalian in an outlier position. A shift towards the state languages can be observed at the PoS level, but the overall distancebetween Dutch Low Saxon and German Low Saxon does not seem to markedlyincrease at the three levels we studied.