USDA - www.usda.gov Current U.S. Department of Agriculture information, programs and resources.

NATIONAL ORGANIC PROGRAM - www.ams.usda.gov/nop  USDA’s National Organic Program, which develops and implements national organic standards..

USDA Economic Research Service - www.ers.usda.gov/briefing/Organic/ The Main Source of economic information and research from the USDA. Includes information on certified organic acreage by state.

Organic Agriculture Centre of Canada - http://www.organicagcentre.ca/ Dedicated to enhancing the environmental and social integrity of agriculture through scientific analysis of methods to improve the sustainability of farming.

Organic Materials Review Institute
OMRI is a 501(c)(3) nonprofit organization created to benefit the organic community and the general public. Its primary mission is to publish and disseminate generic and specific (brand name) lists of materials allowed and prohibited for use in the production, processing, and handling of organic food and fiber. OMRI also conducts scientific research and education on the use of materials by the organic industry.

IFOAM (International Federation of Organic Agriculture Movements)
IFOAM's goal is the worldwide adoption of ecologically, socially and economically sound systems that are based on the principles of Organic Agriculture.

Organic Trade Association
The Organic Trade Association (OTA) is a membership based business association representing the organic industry in Canada, the United States and Mexico. Members include growers, shippers, processors, certifiers, farmer associations, brokers, manufacturers, consultants, distributors and retailers. Established in 1985 as the Organic Foods Production Association of North America, the Organic Trade Association works to promote organic products in the marketplace and to protect the integrity of organic standards.

有機農業全球資訊網（http://organic.niu.edu.tw ）--- 介紹有機農業之意義、介紹台灣與其他國家有機農業之發展與現況。介紹有關有機農業之生產方式，包括耕作方式、土壤與肥料管理、病蟲害防治、作物栽培管理技術、諮詢輔導單位及專家、消費須知以及相關書籍等。

中绿华夏有机食品认证中心（China Organic Food Certification Center, 简称 COFCC）http://www.ofcc.org.cn/ --- 中国农业部推动有机农业运动发展和从事有机食品认证、管理的专门机构.