Are the Nephilim the demi-gods of the bible? The Nephilim were not aliens, angels, “Watchers,” or rock monsters; they were literal, physical beings produced from the union of the sons of God and the daughters of men. > When man began to multiply on the face of the land and daughters were born to them, the sons of God saw that the daughters of man were attractive. And they took as their wives any they chose. Then the Lord said, “My Spirit shall not abide in man forever, for he is flesh: his days shall be 120 years.” The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of man and they bore children to them. These were the mighty men who were of old, the men of renown.Genesis 6:1–4 Looking at how this is written it reminds me a lot of the demi-gods in especially the Greek mythology. My question is are the Nephilim the demi-gods of the bible?

It depends what you mean by "demi-god".

They are of somewhat divine origin, by most understandings of "sons of God" (ancient Hebrew sources identify them with angels of some description). They were men of great renown. That much is in common with the Greek tradition of heroes of divine heritage.

However, the Greek heroes (not all of whom were demi-gods in the sense of divine parentage) are the focus of many key stories of myth and actually a focus of religious practice in their cultures - the hero cults. The same cannot be said of the Nephilim in Christianity or Judaism.