Altenglan is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Kusel district in Rhineland-Palatinate, Germany. It belongs to the Verbandsgemeinde of Altenglan, and is also its seat. Altenglan is a recognized tourism community. Also, named after the municipality is the Altenglan Formation, a lithostratigraphic entity, and by extension, so is Altenglanerpeton, a microsaur whose fossil remains were found therein.