Objective: To investigate the clinical characteristics of ruptured aneurysms in Jilin Province Design: Retrospective analyses of prospectively recorded data Setting: Department of Neurosurgery, The First Hospital of Jilin University, Jilin Province, China Subject: Data collected from 694 cases of ruptured aneurysms in 2014 Intervention: Each patient's basic information, aneurysm characteristics and whether multiple aneurysms had occurred were recorded. A summary of the date and time of the incidence of aneurysmal subarachnoid hemorrhage (aSAH) was noted. Main outcome measure: This study recorded the characteristics of ruptured aneurysms in Jilin Province and made comparisons with the established tendencies in other studies. Result: Among the 694 cases, there were high incidence rates of aSAH between March and May and between September and November, as well as between 5 AM and 8 AM. The condition was more common in females than in males. The diameters of 74.2% of the aneurysms were between 3 and 10 mm. Anterior communicating artery aneurysms (AcoAs) were the most common (accounting for 37.8% of the anterior circulation aneurysms), followed by posterior communicating artery aneurysms (PcoAs), accounting for 27.6% of the anterior circulation aneurysms. Multiple aneurysms accounted for 25.8% of all of the aneurysms. Mirror aneurysms comprised 6% of all of the aneurysms and 23.4% of the multiple aneurysms, which mainly consisted of bilateral PcoAs and bilateral middle cerebral artery aneurysms (MCAs). The above results were consistent with the tendencies of other studies, including the seasonal, daytime, age and gender-female predispositions. Conclusion: Although this study demonstrates high consistency with other studies, the results are only representative of Jilin Province in China, which indirectly can contribute to the understanding of aneurysm rupture risks.