| Ain | |
| Nickname: | Patel Nagar |
| Settlement Type: | Village |
| Pushpin Map: | India Uttar Pradesh#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Uttar Pradesh, India |
| Coordinates: | 26.7486°N 80.7319°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Uttar Pradesh |
| Subdivision Type2: | District |
| Subdivision Name2: | Lucknow |
| Unit Pref: | Metric |
| Area Total Km2: | 9.766 |
| Population Total: | 5052 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Hindi |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 226401 |
Ain is a village in Sarojaninagar block of Lucknow district, Uttar Pradesh, India.[1] The Nagwa river flows past the northeastern side of the village, and the road to Mohan is on the southwestern side.[2] The village is well-irrigated and has stiff loamy soil with a proportion of clay, and rice is the staple crop.[2] There is a market held on Tuesdays and Saturdays, mostly specialising in livestock.[3]
As of 2011, Ain has a population of 5,052 people, in 960 households.[1]
At the turn of the 20th century, Ain was described as a large but otherwise unremarkable village in the northwestern part of the Bijnaur pargana.[2] It had a small school, but no market.[2] Its population in 1901 was 2,319 people, with a large majority belonging to the Kurmi caste.[2]
The 1961 census recorded Ain as comprising 6 hamlets, with a total population of 2,729 (1,431 male and 1,298 female), in 152 households and 152 physical houses.[3] The area of the village was given as 2,128 acres.[3] By this point, Ain did have a market, taking place on Tuesdays and Saturdays and specialising in livestock; average attendance at that point was about 500 people.[3]
The 1981 census recorded Ain as having a population of 3,975 people, in 744 households, and covering an area of 961.97 hectares.[4]