Ottenthal is a town in the district of Mistelbach, in the Austrian state of Lower Austria. It lies in the northeastern part of the country, within the Weinviertel region bordering the Czech Republic.
The settlement is one of the smaller municipalities in the district, which has its administrative seat in the town of Mistelbach. Like much of the surrounding area, Ottenthal is a rural community set among farmland and low rolling hills.