道芬县（Dauphin County, Pennsylvania）是位于美国宾夕法尼亚州中南部的一个县，西傍萨斯奎哈纳河。面积1,444平方公里。根据美国人口调查局2000年统计，共有人口253,282人。县治哈里斯堡也是州的首府。

成立于1785年3月4日。县名是法语王储的意思。

Dauphin County /ˈdɔːfɪn/ is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 268,100. The county seat and the largest city is Harrisburg, Pennsylvania's state capital and tenth largest city. The county was created/"erected" on March 4, 1785, from part of Lancaster County and was named after Louis-Joseph, Dauphin of France, the first son of Louis XVI.