| Cao Zhenyong | |
| Office: | Chief Grand Councillor |
| Term Start: | 1824 |
| Term End: | 1835 |
| Predecessor: | Changling |
| Successor: | Wenfu |
| Term Start1: | 1820 |
| Term End1: | 1823 |
| Predecessor1: | Tojin |
| Successor1: | Changling |
| Office2: | Grand Secretary of the Wuying Hall |
| Term Start2: | 1821 |
| Term End2: | 1835 |
| Office3: | Grand Secretary of the Tiren Library |
| Term Start3: | 1813 |
| Term End3: | 1821 |
| Office4: | Assistant Grand Secretary |
| Term Start4: | 1813 |
| Term End4: | 1813 |
| Office5: | Minister of Personnel |
| Term Start5: | 10 October 1813 |
| Term End5: | 14 October 1813 |
| Alongside5: | Songyun |
| Predecessor5: | Zou Bingtai |
| Successor5: | Zhang Xu |
| Office6: | Minister of Revenue |
| Term Start6: | 19 August 1809 |
| Term End6: | 10 October 1813 |
| Alongside6: | Lukang (until 1810), Tojin (since 1810) |
| Predecessor6: | Dai Quheng |
| Successor6: | Pan Shi'en |
| Office7: | Minister of Works |
| Term Start7: | 20 November 1806 |
| Term End7: | 19 August 1809 |
| Alongside7: | Yunbu |
| Predecessor7: | Wang Zhiyi |
| Successor7: | Dai Quheng |
| Birth Date: | 1755 |
| Birth Place: | She County, Anhui, China |
| Death Place: | Beijing, China |
| Father: | Cao Wenzhi |
Cao Zhenyong (; 1755 - 1835) was a Chinese statesman of the Qing dynasty. He served in a leading position in the Grand Council under the Daoguang Emperor. He is widely believed to be responsible for the formalized style of government, which was promoted under the Daoguang Emperor's reign and contributed to the emperor's failure to reform the increasingly corrupt administration of the Qing Empire.