Haykaz Kostanyan | |
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| First Secretary of the Communist Party of Armenia | |
| In office 8 April 1928 – 7 May 1930 | |
| Preceded by | Hayk Ovsepyan |
| Succeeded by | Aghasi Khanjian |
| Personal details | |
| Born | 1898 Tbilisi, Russian Empire |
| Died | April 21, 1938 (aged 39–40) Moscow, Russian SFSR, Soviet Union |
| Political party | Russian Communist Party (Bolsheviks) (1916–1937) |
Haykaz Arshaki Kostanyan (Armenian: Հայկազ Արշակի Կոստանյան, Russian: Айказ Аркадьевич Костанян; 1898 – 21 April 1938) was a Soviet Armenian politician.