Feeds contribute highly to the environmental impacts of livestock products. Therefore formulating low-impact feeds necessitates data of the environmental impacts of feed ingredients with consistent perimeters and methodology for life cycle assessment (LCA). We built the ECOALIM dataset of life cycle inventories (LCI) and associated impacts for feed ingredients utilised in animal production in France. It provides several perimeters for LCI (field gate, storage organization gate, plant gate and harbour gate) with homogeneous data source from R&D French institutes covering the period 2005-2012. The dataset of 149 environmental impacts is available as an Excel spreadsheet on the ECOALIM website and provides ILCD and CML climate change and acidification, eutrophication, CED non-renewable energy, phosphorus consumption, and CML land occupation. Life cycle inventories of the ECOALIM dataset are available in the Agribalyse® database in SimaPro® software. The ECOALIM dataset can be utilized by the feed manufacturer and the LCA practitioner to investigate the formulation of low-impact feeds. It also provides data for environmental evaluation of feeds and environmental evaluation of animal production systems.