US passports are only valid for 10 years, after which they must be renewed.
However, even if your passport has expired, you can still travel to some countries.
US citizens do not need a valid passport to travel to US territories such as Puerto Rico and the US Virgin Islands. In addition, US citizens can also enter Canada, Mexico, and the Caribbean with an expired passport as long as it is accompanied by a government-issued photo ID.
If you're looking to travel internationally, you will need to renew your passport. This is because most countries will not allow you to enter with an expired US passport. So if you're planning a trip abroad, make sure to renew your passport well in advance. Additionally, keep in mind that even if your US passport is still valid, many countries require that it have at least six months of validity remaining before they will allow you to enter. So it's always a good idea to check the requirements of your destination country before you travel.