Ethylmercury (sometimes ethyl mercury) is a cation composed of an ethyl group bound to a mercury(II) centre; its chemical formula is C₂H₅Hg⁺. Ethylmercury is sometimes used as a generic term to describe organomercury compounds which include ethylmercury such as ethylmercury chloride and ethylmercury urea.

Ethylmercury (sometimes ethyl mercury) is a cation composed of an ethyl group bound to a mercury(II) centre; its chemical formula is C₂H₅Hg⁺. Ethylmercury is sometimes used as a generic term to describe organomercury compounds which include ethylmercury such as ethylmercury chloride and ethylmercury urea.