偏钒酸钠，化学式NaVO₃。

无色棱柱状单斜结晶，溶于水。在自然界以少见的付穆水钒钠石（metamunirite，无水物）和水钒钠矿（munirite，二水物）存在。

Sodium metavanadate is the inorganic compound with the formula NaVO₃. It is a yellow, water-soluble solid. Its natural forms include mineral metamunirite (anhydrous) and a dihydrate, munirite. Both are very rare, metamunirite is now known only from vanadium- and uranium-bearing sandstone formations of central-western USA and munirite from Pakistan and South Africa.