Mahlberg (Low Alemannic: Mohlburg) is a city in the Ortenaukreis, in western Baden-Württemberg, Germany.

After their extinction in the middle of the 15th century, the city came to the Margraviate of Baden-Baden, whereby a common rule was agreed with the counts of Nassau-Saarbrücken.

After the joint ownership of Baden and Nassau was dissolved in 1629, the city then became a center of Baden-Baden rule.

In 1935, Mahlberg lost its city rights in the course of the National Socialist central administrative "cleanup", but was given it back in 1950 after the then Prime Minister of Baden, Leo Wohleb (before Baden-Wuerttemberg was founded).

Immediate neighboring municipalities are Kippenheim in the north (followed by Lahr), Kappel-Grafenhausen in the west beyond the federal highway 5 and Ettenheim in the southeast (with Altdorf).

A few years ago, an inter-communal industrial area called "DYNA5" was also identified and developed with the neighboring community of Ettenheim.

The climate in this region shows slight differences between highs and lows, and there is sufficient rainfall throughout the year.