Why people ask it
Because the claim circulates widely online, usually presented as something scholars are hiding.
Short answer
Yes. His existence is affirmed by multiple early sources including non-Christian ones, and it is accepted by the overwhelming majority of historians regardless of their own beliefs.
Deeper answer
Ancient history operates on fragments. For most first-century figures we have a handful of references written well after the fact. Measured against that baseline, the documentary situation for Jesus is unusually good rather than unusually thin.
The evidence arrives from several directions: multiple early Christian sources containing independent material, plus references from Roman and Jewish writers with no interest in advancing the movement. The mythicist position is held by a very small number of people, most of whom work outside the relevant academic fields.
It is worth being clear that this establishes existence and execution, not the resurrection. Conceding that boundary explicitly makes the rest of your case more credible, because it shows you are tracking what the evidence actually supports.
Common mistake
Overstating the sources — claiming contemporaries wrote in the same year, or citing numbers you cannot verify. It is easily checked.
Conversation-ready response
""Historians who are not Christians — including secular ones — accept that Jesus lived and was crucified. That does not get you to the resurrection, but it does mean we are talking about a real person.""
Source notes coming soon.