Objective: To determine the prevalence of bipolar disorder and associated risk factors among the population in the Western Region, KSA.

Methods:This research will employ a cross-sectional study design. Cross-sectional studies are well-suited for assessing the prevalence and risk factors of a particular condition in a specific population at a single point in time. This design will allow us to gather data on the prevalence of bipolar disorder and identify associated risk factors among the population in the Western region of Saudi Arabia.

Results: The study included 407 participants. The most frequent weight among them was 51-65 kg (n= 109, 26.8%), followed by 66-75 kg (n= 93, 22.9%). The most frequent height among study participants was 1.61-1.70 m (n= 137, 33.7%) followed by 1.51-1.60 m (n= 128, 31.4%). The most frequent body mass index value was 18.5-24.9 kg/m² (n= 161, 39.6%), followed by 25-29.9 kg/m² (n= 142, 34.9%). The gender of study participants is almost equal with male (n= 204, 50.1%) and female (n= 203, 49.9%). The most frequent age among them was 62 years and above (n= 157, 38.6%), followed by 40-50 years (n= 92, 22.6%). Participants were asked the participants about what is the duration of their mental illness(bipolar). The most frequent answer was nothing (n=277,68.1%), followed by one year (n=96, 23.6%), and the least of them were six years (n=1,0.2%).

Conclusion: The results showed that most of the study participants are married and intermediate owners and most of them have a university education. Most participants are not overweight according to their body's bodies. Most of the study participants had a good social link.