Will there be sin during the Millennial Reign?

Note: As with many other topics, there are differing views (e.g., premillennialism, postmillennialism, amillennialism, etc.) that do not jeopardize a believer’s salvation.

Based on multiple sources, the answer is that sin will be restrained yet still present. It appears that Satan will be bound for 1,000 years, as indicated by the verse below:

“He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years” (New International Version, Revelation 20:2).

However, those who do not receive glorified, resurrected bodies will still be susceptible to sin and temptation, if this is indeed what will take place.

Who are these people? 

Those who survive the Tribulation will have children, who may in turn have children of their own, and so on. These people will still have their normal, earthly bodies, and it appears that sin will be passed down from generation to generation—similar to generational sin—if this is indeed what takes place.

Some of these people will then do the following:

When the thousand years are over, Satan will be released from his prison and will go out to deceive the nations in the four corners of the earth—Gog and Magog—and to gather them for battle. In number they are like the sand on the seashore. They marched across the breadth of the earth and surrounded the camp of God’s people, the city he loves. But fire came down from heaven and devoured them. And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever. (New International Version, Revelation 20:7-10)

In summary, those who receive glorified, resurrected bodies will no longer be subject to sin or death. However, those who survive the Tribulation and enter the Millennial Kingdom in their natural, mortal bodies will retain their fallen human nature and remain capable of sinning. They may also have children, who will likewise be born with a fallen human nature. Whether those with glorified, resurrected bodies could have children is not explicitly addressed in Scripture, although it seems unlikely given Jesus’ statement in Matthew 22:30.