Celery (Apium graveolens L.), an annual or biennial herbage species in the family Apiaceae, originated from the Mediterranean and the Middle East and it has been cultivated worldwide as a popular vegetable. Celery has a cultivation history of more than two thousand years. The majority of cultivated celery are functional diploids (2n = 22) with an estimated genome size of 3.18 Gb. Celery is rich in vitamins, carotene, protein, cellulose, and other nutrients and is a good source of flavonoids, volatile oil, and antioxidants. Celery can also be utilized in chemical and medicine industries.