宾夕法尼亚世（英语：Pennsylvanian）是地球历史中的一个地质时代，被国际地层委员会所承认，也是石炭纪后期。宾夕法尼亚纪的年代大约位于318.1± 1.3至299± 0.8百万年前。就像其他许多地质年代学的年代一样，科学家可以利用岩床来辨识出宾夕法尼亚纪，虽然准确的起始与终结时间仍未确定。宾夕法尼亚纪是根据美国的宾夕法尼亚州来命名的，因为宾夕法尼亚纪的岩层广泛分布在这里。

所有现代真菌科的生物都出现在宾夕法尼亚纪当中。

The Pennsylvanian (also known as Upper Carboniferous or Late Carboniferous) is, in the ICS geologic timescale, the younger of two subperiods (or upper of two subsystems) of the Carboniferous Period. It lasted from roughly 323.2 million years ago to 298.9 million years ago Ma (million years ago). As with most other geochronologic units, the rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few million years. The Pennsylvanian is named after the U.S. state of Pennsylvania, where the coal-productive beds of this age are widespread.