| Image Coa: | DEU Südergellersen COA.svg |
| Coordinates: | 53.2167°N 28°W |
| Image Plan: | Südergellersen in LG.svg |
| State: | Niedersachsen |
| District: | Lüneburg |
| Samtgemeinde: | Gellersen |
| Elevation: | 44 |
| Area: | 18.46 |
| Postal Code: | 21394 |
| Area Code: | 04135 |
| Licence: | LG |
| Gemeindeschlüssel: | 03 3 55 035 |
| Mayor: | Annette Kammeier[1] |
| Party: | CDU |
| Ruling Party1: | CDU |
| Ruling Party2: | SPD |
Südergellersen is a municipality in the district of Lüneburg, in Lower Saxony, Germany.