*[http://rruff.geo.arizona.edu/AMS/amcsd.php American Mineralogist Crystal Structure Database (AMCSD)] (contents: crystal structures of minerals, access: free, size: large)
*[http://www.ccdc.cam.ac.uk/products/csd/ Cambridge Structural Database (CSD)] (contents: crystal structures of organics and metal-organics, access: restricted, size: very large)
*Crystallography Open Database (COD) (contents: crystal structures of organics, metalorganics, minerals, inorganics, metals, alloys, and intermetallics, access: free, size: very large)
*[http://crystallography.io/ COD+] (Web Interface for COD) (contents: crystal structures of organics, metalorganics, minerals, inorganics, metals, alloys, and intermetallics, access: free, size: very large)
*[http://www.iza-structure.org/databases/ Database of Zeolite Structures] (contents: crystal structures of zeolites, access: free, size: small)
*[http://www.cryst.ehu.es/icsdb/index.html Incommensurate Structures Database] (contents: incommensurate structures, access: free, size: small)
*Inorganic Crystal Structure Database (ICSD) (contents: crystal structures of minerals and inorganics, access: restricted, size: large)
*[http://materialsproject.org MaterialsProject Database] (contents: crystal structures of inorganic compounds, access: free, size: large)
*[https://mpds.io Materials Platform for Data Science (MPDS) or PAULING FILE] (contents: critically evaluated crystal structures, as well as physical properties and phase diagrams, from the world scientific literature, access: partially free, size: very large)
*[http://materialsweb.org MaterialsWeb Database] (contents: crystal structures of inorganic 2D materials and bulk compounds, access: free, size: large)
*[https://web.archive.org/web/20080622165920/http://tothcanada.com/databases.htm Metals Structure Database (CRYSTMET)] (contents: crystal structures of metals, alloys, and intermetallics, access: restricted, size: large)
*[http://webmineral.com/ Mineralogy Database] (contents: crystal structures of minerals, access: free, size: medium)
*[http://database.iem.ac.ru/mincryst/index.php MinCryst] (contents: crystal structures of minerals, access: free, size: medium)
*[https://web.archive.org/web/20080516022153/http://www.nist.gov/srd/nist83.htm NIST Structural Database NIST Structural Database] (contents: crystal structures of metals, alloys, and intermetallics, access: restricted, size: large)
*[https://web.archive.org/web/20080610153131/http://www.nist.gov/srd/nist42.htm NIST Surface Structure Database] (contents: surface and interface structures, access: restricted, size: small-medium)
*[http://ndbserver.rutgers.edu/ Nucleic Acid Database] (contents: crystal and molecular structures of nucleic acids, access: free, size: medium)
*[http://www.crystalimpact.com/pcd/Default.htm Pearson's Crystal Data] (contents: crystal structures of inorganics, minerals, salts, oxides, hydrides, metals, alloys, and intermetallics, access: restricted, size: very large)
*[http://www.wwpdb.org/ Worldwide Protein Data Bank (PDB)] (contents: crystal and molecular structures of biological macromolecules, access: free, size: very large)
*[http://nanocrystallography.research.pdx.edu/search/wcd/ Wiki Crystallography Database (WCD)] (contents: crystal structures of organics, metalorganics, minerals, inorganics, metals, alloys, and intermetallics, access: free, size: medium)