Dataset of a 4-wave electoral panel survey during the 2024 Belgian elections. The panel consists of 4 waves in the electoral year of 2024, when elections took place in Belgium for the federal, regional, and European level on 9 June and for the local level on 13 October. Wave 1 was fielded in January (pre-campaign), wave 2 in May (campaign), wave 3 in June (post-electoral), and wave 4 in November (post-electoral). The dataset consists of separate samples for Brussels, Flanders, and Wallonia. The surveys focus strongly on affective polarization and perceptions of differentness.