The Geological Society of Finland (Suomen Geologinen Seura, SGS), established in 1886, is the oldest and largest geological association in Finland, boasting approximately 850 members as of 2023. The primary mission of SGS is to advance geological and mineralogical research within the country while fostering interest and engagement in these scientific fields.

SGS provides a range of services and activities, including monthly meetings that feature expert presentations on topics such as mineralogy and environmental impacts. The society also organizes various events like the annual GeoDays and competitions for students, including the National Geology Olympiad. Members receive access to the Geologi magazine and can contribute articles to the Bulletin of the Geological Society of Finland, enhancing knowledge dissemination within the field.

With a commitment to promoting geology and mineralogy, SGS serves as a pivotal platform for professionals and enthusiasts alike, encouraging collaboration and ongoing education in geosciences across Finland.