| En Name: | Bolsheustyikinskoye |
| Ru Name: | Большеустьикинское |
| Loc Name1: | Оло Ыҡтамаҡ |
| Loc Lang1: | Bashkir |
| Coordinates: | 55.9453°N 58.2681°W |
| Map Label Position: | bottom |
| Federal Subject: | Republic of Bashkortostan |
| Adm District Jur: | Mechetlinsky District |
| Adm Selsoviet Type: | Selsoviet |
| Adm Selsoviet Jur: | Bolsheustyikinsky |
| Adm Selsoviet Jur Ref: | [1] |
| Adm Ctr Of1: | Mechetlinsky District |
| Adm Ctr Of2: | Bolsheustyikinsky Selsoviet |
| Inhabloc Cat: | Rural locality |
| Inhabloc Type: | Selo |
| Mun Data As Of: | July 2012 |
| Mun District Jur: | Mechetlinsky Municipal District |
| Mun District Jur Ref: | [2] |
| Rural Settlement Jur: | Bolsheustyikinsky Selsoviet Rural Settlement |
| Mun Admctr Of1: | Mechetlinsky Municipal District |
| Mun Admctr Of2: | Bolsheustyikinsky Selsoviet Rural Settlement |
| Pop 2010Census: | 6397 |
| Date: | January 2013 |
Bolsheustyikinskoye (Russian: Большеустьики́нское; Bashkir: Оло Ыҡтамаҡ, Olo Iqtamaq) is a rural locality (a selo) and the administrative centre of Mechetlinsky District in Bashkortostan, Russia. It is located near the Ay River. Population: