The food industry is the most important industrial activity in Spain in terms of production and employment; its spatial concentration is considerable. However, there is a lack of quantitative research on its agglomerations, especially at high levels of spatial and sectorial disaggregation. With the study presented, this deficit is addressed, using systematic and quantitative methods to examine the spatial agglomeration in the subsectors that the food industry is specialized. Spanish food industry clusters have been identified by applying a top-down quantitative methodological approach—the cluster index—and following a high level of territorial and sectorial disaggregation. Clusters were identified at the three- and four-digit sectorial disaggregation. The number of four-digit-level relevant clusters was higher than three-digit disaggregation. This evidence was verified using nonparametric statistical tests (Wilcoxon signed-rank test). Furthermore, the analysis of four significant three-digit subsectors allows us to advance two alternative explanations for the divergent results at the different levels of the analysis (three digits vs. four digits). This partly explains the potential competitiveness of Spain in the food industry and shows the possibility of establishing policies for the development of clusters.

就生产和就业而言，食品工业是西班牙最重要的工业活动。它的空间集中度很大。但是，缺乏关于其集聚的定量研究，特别是在空间和部门分类高度集中的情况下。通过提出的研究，使用系统和定量的方法来检查食品行业专业化子行业中的空间集聚，以解决这一不足。西班牙食品产业集群是通过采用自上而下的定量方法学方法（集群指数）并遵循高度的领土和部门分类来确定的。在三位数和四位数的部门分解中确定了集群。四位数级别的相关聚类的数量高于三位数分解。使用非参数统计检验（Wilcoxon符号秩检验）验证了该证据。此外，对四个重要的三位数子行业的分析使我们能够针对分析的不同级别（三位数与四位数）的不同结果提供两种替代解释。这部分解释了西班牙在食品工业中的潜在竞争力，并显示了制定产业集群发展政策的可能性。