| XXIII Reserve Corps XXIII. Reserve-Korps | |
|---|---|
&sq=&lang=&file=File:Stab_eines_Generalkommandos.svg) Flag of the Staff of a Generalkommando (1871–1918) | |
| Active | October 1914 - 12 August 1918 |
| Country |  German Empire |
| Type | Corps |
| Size | Approximately 32,000 (on formation) |
| Engagements | World War I |
The XXIII Reserve Corps (German: XXIII. Reserve-Korps / XXIII RK) was a corps level command of the German Army in World War I.