巴特克罗伊茨纳赫（德语：Bad Kreuznach）是德国莱茵兰-普法尔茨州巴特克罗伊茨纳赫县的首府，位于纳厄河畔，人口约4.5万。

Bad Kreuznach (German pronunciation:[baːt ˈkʁɔʏtsnax]) is a town in the Bad Kreuznach district in Rhineland-Palatinate, Germany. It does not lie within any Verbandsgemeinde, even though it is the seat of the like-named Verbandsgemeinde. Bad Kreuznach is a spa town and the seat of several courts as well as federal and state authorities. Bad Kreuznach is also officially a große kreisangehörige Stadt ("large town belonging to a district"), meaning that it does not have the district-level powers that kreisfreie Städte ("district-free towns/cities") enjoy. It is, nonetheless, the district seat, and also the seat of the state chamber of commerce for Rhineland-Palatinate. It is classed as a middle centre with some functions of an upper centre, making it the administrative, cultural and economic hub of a region with more than 150,000 inhabitants. Moreover, the town and the surrounding areas are renowned both nationally and internationally for their wines, especially from the Riesling, Silvaner and Müller-Thurgau grape varieties.