The Northern Gauteng Orchid Society or Noord-Gauteng Orgideevereniging (NGOS) is an orchid society based in Pretoria. It serves the orchid growers and orchid enthusiast of the Northern Gauteng area.

NGOS has been in existence since 1967 (formerly as the Orchid Society of Northern Transvaal) and is the 4th oldest orchid society in the country. NGOS members meet regularly to discuss aspects of orchid culture and to show off their flowering plants.

NGOS strives to improve the knowledge of orchid culture and to provide resources for its members to learn more about orchids. NGOS supports the SAOC and other organisations in its attempts to educate the public about the need to conserve our indigenous orchids.