Harry Clay Bates (November 22, 1882 – April 4, 1969) was an American labor union leader.
He joined the Bricklayers, Masons, and Plasterers International Union in 1900, and in 1910, he was elected as president of its local in Dallas.
In 1914, he was additionally elected as president of the Texas State Conference of Bricklayers.
In 1933, he became a vice-president of the American Federation of Labor (AFL) and then in 1936, he was elected as president of the bricklayers.
Early in 1969, he suffered a heart attack and moved to Florida to recuperate, but he died there in April.