As of 2026, U.S. citizens can still technically use an original or certified copy of their birth certificate to enter Canada, but only when traveling by land or sea (car, bus, train, or boat). However, the birth certificate alone is not sufficient; it must be accompanied by a government-issued photo ID, such as a driver's license, to prove both citizenship and identity. If you are flying into Canada, a birth certificate is not acceptable; all air travelers, including infants, are strictly required to have a valid U.S. passport or a NEXUS card. Even for land crossings, Canadian Border Services Agency (CBSA) and U.S. Customs and Border Protection (CBP) strongly recommend a passport or a Passport Card, as these are "WHTI-compliant" documents that speed up the process and reduce the risk of secondary inspection. Travelers using a birth certificate in 2026 should expect more detailed questioning from border officers and should ensure the document has a raised seal or is a certified "long-form" version to avoid being turned back at the border.