For aging speech, there is a limited knowledge regarding the articulatory adjustments underlying the acoustic findings observed in previous studies. In this context, ultrasound (US) imaging is a technology that can be safely used to study static and dynamic features of the articulators allowing comparisons of physiological differences between old and young adults during speech production. In order to investigate the age-related articulatory differences in European Portuguese (EP) vowels, the present study analyzes the tongue contours of the 9 EP oral vowels in isolated context and in a disyllabic sequence. From the tongue contours segmented from the US images, several parameters were extracted (e.g., tongue height, tongue advancement) to allow comparisons between speakers of different age groups. For this study, while the analysis of data for more speakers is ongoing, we considered a set of four EP native female speakers of two different age groups ([19-31] and [63-66]) and addressed the study of the articulatory space of the EP oral vowels.