耶芝县（Yates County, New York）是美国纽约州西部的一个县。面积973平方公里。根据美国2000年人口普查，共有人口24,621。县治彭延 (Penn Yan)。

成立于1823年2月5日。县名纪念签署成立本县的州长约瑟·C·耶芝 (Joseph Christopher Yates)。

Yates County is a county located in the U.S. state of New York. As of the 2010 census, the population was 25,348, making it the third-least populous county in New York. The county seat is Penn Yan. The name is in honor of Joseph C. Yates, who as Governor of New York signed the act establishing the county.