| Dénes Andrássy | |
| Birth Date: | 19 November 1835 |
| Spouse: | Franziska Seraphica Hablawetz |
| Parents: | György Andrássy Franciska Königsegg-Aulendorfi |
| Nationality: | Hungarian |
Count Dénes Andrássy de Csíkszentkirály et Krasznahorka (19 November 1835 – 23 February 1913) was a Hungarian nobleman, who served as chairman of the Hungarian Heraldic and Genealogical Society. He was a wealthy, generous and enlightened patron of the arts.
His parents were Count György Andrássy and Countess Franciska Königsegg-Aulendorfi. He married Franciska Hablawetz. After her death he founded Franciska Relic Museum in his birthplace.
He was a member of the Hungarian Academy of Sciences.