Rosengarten is a rural municipality in the district of Harburg, Lower Saxony, Germany, near Hamburg. It had a population of 13,242 in 2004. It was formed in 1972 as a combination of the villages of Eckel, Ehestorf (with Alvesen), Emsen, Iddensen, Klecken, Leversen, Nenndorf, Sottorf, Tötensen, and Vahrendorf, and was named for a nearby forest of the same name.
The honorary consulate of the Republic of Guinea to Hamburg has been in Rosengarten since 1990.
Dieter Bohlen lives in Tötensen.