ESR

ESR may refer to:

Organizations

Earlham School of Religion, at Earlham College in Richmond, Indiana, US
E.S.R., Inc., a former American toy manufacturer
ESR Rīga, a Soviet Latvian football club, active from 1966 to 1991
ESR Technology, a UK company
e-Shang Redwood, an Asia focused Real Estate services and investment firm
{{lang|el-Latn|Ethnikó Simvúlio Radhiotileórasis}} ({{langx|el|Εθνικό Συμβούλιο Ραδιοτηλεόρασης|links=no}}), the Greek National Council for Radio and Television
European Society of Radiology
Institute of Environmental Science and Research, a New Zealand scientific institute

EISCAT Svalbard radar, UHF-band radar at Longyearbyen, Norway
Electron spin resonance, a technique used in chemical spectroscopy to identify unpaired electrons and free radicals
Electron spin resonance dating, a dating technique used in archaeology and geology
Erythrocyte sedimentation rate, the rate at which red blood cells sediment
Estrogen receptor, a group of proteins
European Sociological Review, sociological scientific journal

Electro-slag remelting, an alloy remelting and refining process
Electronic Staff Record, a human resources and payroll system of the UK National Health Service
Equivalent series resistance, the resistive parts of the impedance of certain electrical components
Emergency sun reacquisition, an attitude control mode of the Solar and Heliospheric Observatory
Extended-support release, software that receives official security updates for an extended period of time
M2010 Enhanced Sniper Rifle, a sniper rifle used by the US Army

Eric S. Raymond (born 1957), American computer programmer, author and open source software advocate
Emile Smith Rowe, English professional footballer for Fulham FC
Effort Sharing Regulation a European regulation designed to allocate the Green House Gases reduction objectives among European Union Member States