Nils Langer (German pronunciation: [ˈniːls ˈlaŋɐ]; born 25 January 1990, in Ludwigsburg) is a German retired tennis player.

Langer reached a career high ATP singles ranking of world No.

Langer made his ATP main draw debut at the 2009 International German Open in the doubles event where he partnered Kevin Krawietz, but lost in the first round to Marcelo Melo and Filip Polášek, 0–6, 4–6.

In the main draw he drew compatriot Robin Kern, a wildcard entrant, winning 3–6, 6–4, 6–3.

His run came to an end where he lost to the second seed and compatriot Philipp Kohlschreiber, 5–7, 2–6.