Recent decades have seen a growing acknowledgement of violence against women (VAW) as a serious social and public health problem of epidemic proportions. The prevention of VAW and intimate partner violence against women (IPVAW) has become a priority within this context, and includes various prevention strategies such as social participation and helping behaviors. In different countries, conducting research on help-seeking behavior and bystander intervention in cases of VAW is a common practice, but addressing these issues is much less common in Spain. In this context, the objective of this study is to provide a preliminary estimation of the volume of bystanders in cases of IPVAW in Spain between 2005 and 2020 (since the entry into force of Organic Law 1/2004), their willingness to intervene and, in the case of intervention, the type of helping behavior (real or hypothetical) preferred, using the sources (secondary data) available (specifically, survey data, as the surveys of social perception of gender violence and the 2014 and 2019 macro-surveys, and also administrative data, as the database of reports filed). The data analyzed allow us to determine that, in fact, in the cases of IPVAW there are usually persons within the victim's inner circle who are firsthand witnesses or have been informed by the victim of the existence of this type of violence, but, although the bystanders generally claim they would engage in an active and supportive response, this is in fact not always the case. These results underscore the need to develop intervention programs aimed at IPVAW bystanders to improve their reaction and contribute to the development of helpful and efficient active responses.