- ZRL stands for Zurich Research Laboratory
- ZRL stands for Zero Risk Level
- ZRL stands for Zweckverband Schienenpersonennahverkehr Ruhr-Lippe (German transportation system)
- ZRL stands for Zambezi Resources, Ltd. (Zambia)
- ZRL stands for Zambia Railways Ltd. (Kabwe, Zambia)
- ZRL stands for Zero Reference Level (cardiography)
ZRL