Alfred William Gallagher (17 May 1911 – 8 August 1990) (known as Bill Gallagher) was a New Zealand farmer, inventor, manufacturing engineer, businessman and commercial fisherman. He was born in Hamilton, New Zealand on 17 May 1911.
He developed the electric fence for farmers in 1936–1937, and founded the Gallagher Group to manufacture it.
His son, Sir William (Bill) Gallagher, joined the family business in the 1970s and still owns it as of 2013. Another son, John, was in the business until 1997.
Gallagher died from cancer in Hamilton in 1990 and was buried in Hamilton Park Cemetery.