Buzen (豊前国; -no kuni) was an old province of Japan in northern Kyushu, which bordered on Bungo and Chikuzen provinces. Today the area is the eastern part of Fukuoka prefecture, including some northern districts of Oita prefecture.

The ruins of the ancient capital of the province were found near Toyotsu, Fukuoka. The castle town of Kokura was also in Buzen, and a seat of many feudal rulers.