臺13線，係中華民國（臺灣）一條省道。北邊由新竹市香山區內湖開始，經苗栗縣頭份市尖山下、頭屋鄉、苗栗市、銅鑼鄉、三義鄉、臺中市后里區，至終點豐原區，全長69.241公里。其中尖山至豐原路段係臺灣北部地區去苗栗縣、臺中市山線地區必經要道，俗稱「尖豐公路」。呢條路線七成以上路段喺苗栗縣境內，沿途有好多知名風景名勝，係苗栗縣最重要公路之一。臺13線另有1條支線。
Taiwan Line 13 is a provincial highway of the Republic of China (Taiwan). The north side starts from Neihu in Xiangshan District, Hsinchu City, passes through Jianshanxia, Touwu Township, Miaoli City, Tongluo Township, Sanyi Township, Houli District of Taichung City, and ends at Fengyuan District, with a total length of 69.241 kilometers. Among them, the section from Jianshan to Fengyuan is a necessary road from northern Taiwan to Miaoli County and Taichung City, commonly known as "Jianfeng Highway". More than seventy percent of this route is in Miaoli County, and there are many well-known scenic spots along the way, which is one of the most important highways in Miaoli County. Taiwan Line 13 has another branch line.