| Official Name: | Herrö |
| Pushpin Map: | Sweden Stockholm#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Nynäshamn Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Stockholm County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Södermanland |
| Coordinates: | 58.9611°N 17.9964°WHerrön, Nynäshamns kommun |
Herrö, or Herrön, is an island in the southern part of Stockholm archipelago, which forms part of Nynäshamn Municipality, Stockholm County, Sweden.
Herrö is connected to the neighbouring islands of Himmelso and Yxlö by road bridge, and Himmelso is in turn connected to the mainland by a further bridge. The road across the bridges and island is known as the and was originally built in the 1960s to provide access to the Muskö naval base.