George Skeffington Grimmer, QC (June 11, 1826 – March 1, 1887) was a lawyer and political figure in New Brunswick.
He was born in St. Stephen, New Brunswick, the son of Elizabeth Maxwell, daughter of a United Empire Loyalist, and her husband John Davidson Grimmer (1851–1936), a ship builder of German descent whose ancestor Thomas Grimmer (1759–1828) was also a United Empire Loyalist.
Grimmer studied law with James Watson Chandler, was called to the bar in 1849 and set up practice in Charlotte County.
In 1851 he married Mary Allan Hazen (1823–1906) and in 1865 the couple moved to a home in Chamcook, New Brunswick.
He and his wife are buried in the St. John the Baptist Chapel of Ease Anglican Church Cemetery in Chamcook.