Do I need a job offer to immigrate to Canada?

No — not for most of the pathways US applicants typically use. The Federal Skilled Worker Program, Canada's primary Express Entry category, does not require a Canadian job offer; it's designed to select skilled professionals based on their overall profile (age, education, language ability, and work experience), unlike the US's employer-sponsored model. Under the current rules a job offer no longer adds CRS points at all — those points were removed — so not having one puts you at no scoring disadvantage.

That said, a job offer does matter for certain other pathways. Intra-Company Transfer, for instance, is built around an existing employment relationship with a company that has or is establishing a Canadian operation. Some PNP employer-driven streams are explicitly job-offer-based as well. And the Canadian Experience Class requires Canadian work experience already gained, which typically implies you're already employed in Canada.

So the real question isn't "do I need a job offer" in the abstract — it's which pathway fits your profile, and whether a job offer helps, is required, or is irrelevant for that specific route. That's worth working through directly rather than assuming the US employer-sponsorship model applies here, because for most skilled worker applicants, it simply doesn't.