Compared to people who don't believe in Bigfoot (who I'll call "non-believers"), Bigfoot believers tend to have slightly lower income, slightly less education, and slightly more liberal political ideology, but the differences are fairly small. As one would expect, people who believe in Bigfoot (blue bars) are much more likely than Bigfoot non-believers (tan bars) to believe in a wide variety of things, including some that are supernatural.
Thus, one might also expect that Bigfoot believers would be more likely to believe in God and to be more religious in general. That's partly true. 91% of Bigfoot believers believe in God, compared to 87% of Bigfoot non-believers. They also are slightly more likely to believe in Heaven, Hell, angels, demons, and that Jesus is the Son of God. However, according to a wide variety of metrics, Bigfoot believers are substantially less religiously devout than Bigfoot non-believers.
Despite being slightly more likely to believe that God exists and that Jesus is his son, Bigfoot believers are substantially less likely to identify as Bible believing, born again, evangelical, and fundamentalist than people who don't believe in Bigfoot. They attend religious services, religious education, and prayer meetings less often. They also pray and read religious texts substantially less often than people who don't believe in Bigfoot.
Some people say that religious people are religious because they are gullible and willing to believe things for which there is no compelling scientific evidence. Whether that's true or not may depend on whether Bigfoot is real.