George was born on January 12, 1873 in Johnstown, New York, United States. He was the only son and third of four children born to George Austin Streeter and Hannah Green (Anthony) Streeter.
His father was a leader in the local glove-manufacturing industry. Both parents were of English descent, having migrated to Johnstown via New England.
His mother was a Quaker, his father a Presbyterian, and the children were brought up in the Presbyterian belief.