| Official Name: | Olı Mäñgär |
| Native Name: | Олы Мәңгәр |
| Native Name Lang: | tt |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Tatarstan |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Tatarstan |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Ätnä District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
Olı Mäñgär (tt-Cyrl|Олы Мәңгәр|translit=Olı Mäñgär, ru|Большой Менгер) is a rural locality (a selo) in Ätnä District, Tatarstan. The population was 680 as of 2010.[1]
Olı Mäñgär is located 8 km east of Olı Ätnä, district's administrative centre, and 163 km northeast of Qazan, republic's capital, by road.[2] [3]
The village existed already during the period of the Khanate of Qazan.
From 17th to first half of the 19th centuries the village's residents belonged to the social estate of state peasants.
The population of Olı Mäñgär reached its peak of about 1900 inhabitants in 1897. By the beginning of the twentieth century, village had 3 mosques, 2 mektebs, 7 inns, 2 windmills and 3 watermills, 3 smithy, 4 small shops and a bazaar on Tuesdays.
Before the creation of the Tatar ASSR in 1920 the village was a part of Qazan Uyezd of Qazan Governorate. Since 1920 the village was a part of Arça Canton; after the creation of districts in Tatar ASSR (Tatarstan) in Tuqay (later Ätnä) (1930–1959), Tuqay (former Qızıl Yul) (1959–1963), Arça (1963–1990) and Ätnä districts.[4]
Olı Mäñgär is the birthplace of two Tatar Soviet architects, Äxmät Bikçäntäyef and İsmäğil Ğäynetdinef, a poet, Bari Abdullin, the 2nd secretary Tatarstan Regional Committee of the VKP(b),, and a recipient of the award for the Hero of Socialist Labour, Nazlıgöl Latıypova, an Honored Artist of the Tatar ASSR.