Sigou Formation

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| name = Sigou Formation

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| type = Geological formation

| age = Late Cretaceous

| period = Late Cretaceous

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| region = Henan, Hubei

| country = {{flag|China}}

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| overlies = Majiacun Formation

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| extent = Xixia Basin

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The Sigou Formation is a Late Cretaceous geologic formation in China. Fossil dinosaur eggs have been reported from the formation,Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. including Dictyoolithus.Z.-K. Zhao. (1994) "Dinosaur eggs in China:On the structure and evolution of eggshells." In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge. Cambridge. pp. 184-203.