Some people might argue that religion is a superstition.
But of course other superstitions are about. You noticed in the States there's no 13th floor in the buildings?
In Chinese culture the number 8 is lucky?
Some superstitions come from good sense (eg don't walk under a ladder, as something from the ladder or the ladder itself might drop on you!)
Others are just nonsense (when you spilt salt you threw some over your shoulder to keep the devil away)
Do I beleive in them? Not really.