Smithsonian Institution (dieja:. / s m ɪ θ s oʊ n i ə n / smith-soh-nee-ən), dipunyasa nalika taun 1846 "kanggé ningkatake sarta kanggé difusi pangetahuan", inggih punika sekelompok musiyum sarta pusat panelitian ingkang dikelola déning pamaréntah Amérika Sarékat. Disebut "loteng bangsa"[1] wonten eklektik ingkang gunggungipun 137 juta item,[2]] Lembaga ing Washington, DC iku inti saking sangalas musiyum, sanga pusat panelitian, sarta kebon kéwan. Fasilitas tambahan wonten ing Arizona, Maryland, New York City, Virginia, Panama sarta ing panggonan sanès, wonten 168 musiyum sanès. Lembaga punika dipunkunjungi telung puluh juta nggal taun[3] are admitted without charge;
funding comes from the Institution's own endowment, private and corporate contributions, membership dues, government support, and retail, concession and licensing revenues.[2]