Die Jakobuskirche in Miltenberg. Miltenberg in Unterfranken (Lower Franconia) in Bayern, Southern Germany has a population of 9,000. It lies on the Fränkischer Rotwein Wanderweg (Franconian Red Wine Hiking Trail). Tourism is very important for the local economy. Visitors are mainly day trippers from the urban agglomerations in Hessen (Frankfurt, Offenbach, Darmstadt, Hanau).