The objective of this study is to compile, describe and assess interventions to reduce health inequalities developed in Spain by administrations, NGO or other entities. The search was organized in three settings: governmental strategies, interventions, and among the latter, those particularly addressing excluded social groups. Administration actions and policies were investigated through formal surveys addressed to regional governments (17 regions and 2 cities). Production of information by gender and socio-economic level (SEL), plans and programs, as well as interventions was explored. Key informants were consulted and scientific literature was reviewed in order to identify interventions. Médicos del Mundo and Cáritas, two of the main national NGO were consulted. Fourteen administrations responded. In general, health information includes sex analysis, few administrations analyse by gender or SEL and six study inequalities in the general population. Most administrations produce specific information by pathologies (HIV/AIDS.) or social groups (women.). They mention intervention experiences applied to territories or vulnerable groups, evaluated through process indicators. In the period 1995-2002, 722 papers on inequalities in Spain have been published. Among them, 28 are interventions and 9 have been evaluated, mainly with quasi-experimental designs. Large NGO, sometimes with public funding, work with excluded populations through outreach programs. Most Spanish health information does not include yet inequalities analysis, although it is growing steadily. Publication of inequalities studies has increased sharply, but intervention publications are rare and evaluated interventions are extremely scarce. Administrations and NGO work in interventions mainly addressed to excluded populations.