哈姆林县（Hamlin County, South Dakota）是美国南达科他州东部的一个县。面积1,393平方公里。根据美国2000年人口普查，共有人口5,540人。县治海地城（Hayti）。

成立于1872年，县政府成立于1878年。县名纪念亚伯拉罕·林肯首届副总统汉尼拔·哈姆林（Hannibal Hamlin）。

Hamlin County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 5,903. Its county seat is Hayti. The county was created in 1873 and organized in 1878. It was named in honor of Hannibal Hamlin, Lincoln's first vice-president.