Tân An is a former province of South Vietnam. It was established in December 1889 when Gia Định province was split to four smaller provinces. In October 1956 it was merged with Chợ Lớn province (except Trung Quận district, which is Bình Chánh nowadays) to establish Long An province.

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Now Tân An is only known as the capital city of Long An province.

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