斯蒂亚（意大利语：Stia），是意大利阿雷佐省的一个市镇。总面积62.67平方公里，人口2952人，人口密度47.1人/平方公里（2009年）。ISTAT代码为051036。

Stia is a frazione of the comune of Pratovecchio Stia in the Province of Arezzo in the Italian region Tuscany, located about 40 kilometres (25 mi) east of Florence and about 40 kilometres (25 mi) northwest of Arezzo. It was an independent commune until it was merged to Pratovecchio in 2014.