Are overweight people prone to snoring?

They sometimes are. The increased weight will make snoring worse. However, very thin people snore.

There are many factors that can contribute snoring. For example, sleep position, the size and shape of the airway and weight. Being overweight or out-of-shape can make snoring more likely.

Short answer is yes, overweight person is more likely to snore. Snoring may be temporary, related to ongoing cold/ infection or positional (only while laying on the back etc) or part of underlying sleep apnea (breathing problem in sleep). Sleep study may help to see if snoring is a "cosmetic" problem or part of a medical condition.

Yes, over weight people are more prone to snoring. This is related to the deposition of fat tissue in the throat which restricts airflow and creates snoring noise.

Yes, being overweight does put you at a higher risk for sleep disordered breathing including snoring and also sleep apnea. Some people who loose weight do improve their snoring and sleep apnea but not always since being overweight is not the only risk factor for sleep disordered breathing.

There is an increased incidence of snoring and obstructive sleep apnea with obesity.

Yes. Being overweight generally leads to a smaller airway. Snoring and OSA tend to also lead to weight gain.