| Hollingworth Reservoir | |
| Pushpin Map: | Greater Manchester |
| Location: | Longdendale, Greater Manchester and North Derbyshire |
| Lake Type: | former impounding reservoir |
| Inflow: | Ogden Brook |
| Outflow: | Arnfield Reservoir |
| Basin Countries: | United Kingdom |
| Area: | 13acres |
| Depth: | 52feet |
| Volume: | 73e6impgal |
| Elevation: | 554feet |
Hollingworth Reservoir is a former reservoir near Hollingworth, Tameside, Greater Manchester. The reservoir straddles the Greater Manchester–Derbyshire border. It was constructed in 1854 as part of the Longdendale Chain, but was abandoned in 1987 and now forms part of the Swallows Wood nature reserve.[1]