The electoral register (Portuguese: recenseamento eleitoral) is the official list of people eligible to vote in Portugal; the final update showed 11,039,672 registered voters for the 18 January election, 174,662 more than in the 2021 presidential election. That number matters because it determines turnout percentages, seat calculations and whether campaigns target domestic versus overseas voters — expats need to check their registration status if they plan to vote from abroad.