Register at the Portuguese consulate in the United States with jurisdiction over the state in which you live. The website of the Embassy of Portugal to the United States lists of U.S. consulates and their respective states of jurisdiction. The list also includes several honorary consulates. Find additional information about Portugal's U.S. consulates on its citizen website, Portal das Comunidades Portuguesas.
Travel to Washington, D.C. Appear in person at the consulate section of the Portuguese Embassy. At this point, if you have not already registered with a Portuguese consulate, you can register there.
Bring your current passport and your Portuguese Identification Card with you. The passport renewal process requires the PIC. "Passports may be renewed six months within date of expiration," according to the Embassy of Portugal to the United States.
Complete an application form for passport renewal. Minors under the age of 18 must also have a parent sign their application. The parent must have a valid PIC or Portuguese passport.
Pay the consular fee with cash or a money order. At the time of publication, the fee is $70.63 for those 11 years old or younger, $98.88 from 12 to 65 years of age and $84.75 for those 66 years old and older. Pay an additional $17.00 for your new passport to arrive by overnight shipment.