Joseph George Megler (March 10, 1838 – September 10, 1915), generally known as J.G. Megler, was a German-American salmon cannery owner and politician in Washington. He was a member of the Washington House of Representatives for the first legislature in 1889 and five terms thereafter. He was also a member of the Washington State Senate for two terms. During his political career he held the positions of Speaker of the House and President pro tempore of the Senate. He has been described as the father of the salmon hatcheries in Washington.