In geography and agriculture, arable land (from Latin arō; “I plough, I farm”) is land that can be used for growing crops. It includes all land under temporary crops (double-cropped areas are counted only once), temporary meadows for mowing or market and kitchen gardens and land temporarily fallow (less than five years). Abandoned land resulting from shifting cultivation is not included in this category. Data for arable land are not meant to indicate the amount of land that is potentially cultivable. As such, it has to be distinguished from "agricultural land", which, according to FAO definition, additionally includes land under permanent crops as well as permanent pastures. In 2008, the world's total arable land amounted to 13,805,153 km², whereas 48,836,976 km² was classified as "agricultural land".

Although constrained by land mass and topology, the amount of arable land, both regionally and globally, fluctuates due to human and climatic factors such as irrigation, deforestation, desertification, terracing, landfill, and urban sprawl. Researchers study the impact of these changes on food production.