For how long is a passport card valid for adults?

A passport card for adults is valid for 10 years. This duration aligns with the validity period of standard passports for adults, which is also 10 years. The passport card can be used for land and sea travel to specific countries, making it a convenient option for frequent travelers within certain regions, such as Canada and Mexico. The 10-year validity ensures that travelers can enjoy a prolonged period of ease and readiness without the immediate need to renew. Other choices regarding different durations do not apply to the validity of the passport card for adults, as the established standard is a 10-year term.