Christmas traditions include a variety of customs, religious practices, rituals, and folklore associated with the celebration of Christmas. Many of these traditions vary by country or region, while others are universal and practiced in a virtually ubiquitous manner across the world.

Traditions associated with the Christmas holiday are diverse in their origins and nature, with some traditions comprising an exclusively Christian religious character with origins from within the religion, while others have been described as more cultural or secular in nature and have originated from outside the realm of Christian influence. Christmas traditions have also changed and evolved significantly in the centuries since Christmas was first instituted as a holiday, with celebrations often taking on an entirely different quality or atmosphere depending on the time period and geographical region.