Palo Alto County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 8,996. The county seat is Emmetsburg. It is named after the Battle of Palo Alto, the first major battle of the Mexican–American War.

Emmetsburg is a city in Palo Alto County, Iowa, United States. The population was 3,706 at the time of the 2020 census. It is the county seat of Palo Alto County. Emmetsburg is located around the southern bay of Five Island Lake.