| Country: | England |
| Region: | East of England |
| Shire County: | Hertfordshire |
| Civil Parish: | Ayot St Peter |
| Coordinates: | 51.8208°N -0.2333°W |
| Shire District: | Welwyn Hatfield |
| Static Image Name: | Ayotstpeterchurch2.jpg |
| Static Image Caption: | St. Peter's Church at Ayot St. Peter |
| Population: | 245 |
| Population Ref: | (2011 Census) |
| Postcode District: | AL6 |
| Postcode Area: | AL |
| Post Town: | Welwyn |
| Constituency Westminster: | Welwyn Hatfield |
Ayot St Peter is a village and civil parish in the Welwyn Hatfield district of Hertfordshire, England, about two miles north-west of Welwyn Garden City. According to the 2001 census it had a population of 166. At the 2011 Census the population including the nearby Ayot Green and Ayot St Lawrence was 245.[1]