This is a list of the Sites of Special Scientific Interest (SSSIs) in Cumbria. For other counties, see List of SSSIs by Area of Search.
- Alston Shingle Banks
- Annaside
- Annaside And Gutterby Banks
- Appleby Fells
- Argill Woods And Pastures
- Armboth Fells
- Arnside Knott
- Ash Fell
- Ash Fell Edge
- Ashgill Quarry
- Augill Valley Pasture
- Backside Beck And Spen Gill
- Barf And Thornthwaite
- Barker Scar
- Bassenthwaite Lake
- Baysbrown Wood
- Beckfoot Quarry
- Beech Hill Wood
- Belah Woods And Pastures
- Biglands Bog
- Birk Fell
- Birk Fell Hawse Mine
- Birkett Hill And High Out Wood
- Birky Cleugh
- Black Moss
- Black Snib
- Blackdike Bog
- Blagill Mine
- Blea Tarn
- Blea Water
- Blelham Tarn & Bog
- Bolton Fell Moss
- Borrow Beck Meadows
- Bothel Craggs Quarry
- Bowber Head And Piper Hole Meadows
- Bowness Common
- Bowness Knott
- Braithwaite Moss
- Bramcrag Quarry & Wanthwaite Mine
- Brantrake Moss & Devoke Water
- Brathay Quarries
- Bretherdale Meadows
- Broad Dales
- Brothers Water
- Browgill & Stockdale Becks
- Buckbarrow Beck
- Burns Beck Moss
- Burrells Quarry
- Butterburn Flow
- Buttermere
- Buttermere Fells
- Butterwick Meadows
- Cairnbridge Sand Pit
- Castlehead Wood
- Caudbeck Flow
- Cautley Thwaite Meadows And Ecker Secker Beck
- Chapel Bridge Meadows
- Claife Tarns And Mires
- Cliburn Moss
- Clints Crags, Blindcrake
- Clints Quarry
- Clints Quarry, Moota
- Comb Beck
- Combe Scar
- Coniston Mines And Quarries
- Cotehill Pastures And Ponds
- Cowraik Quarry
- Cropple How Mire
- Crosby Gill
- Crosby Ravensworth Fell
- Cumpston Hill
- Cumwhitton Moss
- Deepdale Meadows
- Dodgson Wood
- Drigg Coast
- Drigg Holme
- Drumburgh Moss
- Duddon Estuary
- Duddon Mosses
- Duddon Valley Woodlands
- Dungeon Ghyll
- Eden Gorge
- Ellery Sike
- Elliscales Quarry
- Elterwater
- Ennerdale
- Esthwaite Water
- Ewefell Mire
- Eycott Hill
- Far Arnside
- Farleton Knott
- Finglandrigg Woods
- Florence Mine
- Force Crag Mine
- Foulshaw Moss
- Gelt Woods
- Geltsdale & Glendue Fells
- George Gill
- Gill Beck
- Glasson Moss
- Glencoyne Wood
- Gowbarrow Park
- Gowk Bank
- Great Asby Scar
- Great Blencow Meadows And Fen
- Great Wood
- Greendale Mires
- Gribbs Meadows
- Haggs Bank
- Haile Great Wood
- Hale Moss
- Hale Moss Caves
- Hallinhag Wood
- Hallsenna Moor
- Harthwaite Sike
- Helbeck Wood
- Hell Gill
- Helvellyn & Fairfield
- High Leys
- High Lickbarrow Mires And Pastures
- Hollin Hill
- Hollows Farm Section
- Honister Crag
- Humphrey Head
- Hutton Roof Crags
- Iron Pit Spring Quarry
- Irthing Gorge
- Janny Wood Section
- Jenny Dam
- Jockie's Syke
- Johnny Wood
- Jumb Quarry
- Keisley Quarry
- Kershope Bridge
- Kielder Mires
- Kingwater
- Kirkby Moor
- Knipe Tarn
- Lamonby Verges And Fields
- Langdale Pikes
- Langdale, Bowderdale And Carlin Gill
- Lazonby Fell
- Leck Beck Head Catchment Area
- Little Asby Inrakes And Outrakes
- Little Langdale Tarn
- Little Mell Fell Quarry
- Lodore - Troutdale Woods
- Longsleddale Woods
- Loughrigg Fell Flushes
- Low Beckside Meadow
- Low Church Moss
- Low Wood
- Low Wray Bay
- Ludderburn And Candlestick Mires
- Lyne Woods
- Mallerstang-swaledale Head
- Marble Quarry And Hale Fell
- Maryport Harbour
- Meathop Moss
- Meathop Woods And Quarry
- Melmerby Road Section
- Middlebarrow
- Middlesceugh Woods And Pastures
- Milkingstead Wood
- Millfield Verges
- Miterdale Head Wood
- Mollen Woods
- Moorhouse And Cross Fell
- Moorthwaite Moss
- Morecambe Bay
- Mousegill Beck
- Mungrisdale Mires
- Murthwaite Park
- Nab Gill Mine
- Naddle Forest
- Newton Reigny Moss
- Nichols Moss
- Oakshaw Ford
- Orton Moss
- Orton Pastures
- Oulton Moss
- Outley Mosses
- Over Water
- Penton Linns
- Pets Quarry
- Pillar And Ennerdale Fells
- Pinskey Gill
- Pooley Bridge Section
- Pus Gill
- Raisbeck Meadows
- Ray And Crinkle Crags
- River Calder Section
- River Derwent And Tributaries
- River Eden And Tributaries
- River Ehen (Ennerdale Water To Keekle Confluence)
- River Kent And Tributaries
- River Nent At Blagill
- River Rawthey, Wandale Beck And Sally Beck
- River South Tyne And Tynebottom Mine
- Rosthwaite Fell
- Roudsea Wood & Mosses
- Rusland Valley Mosses
- Salta Moss
- Sandybeck Meadow
- Scafell Pikes
- Scaleby Moss
- Scales Wood
- Scandal Beck And Stone Gill
- Scandal Beck, Brunt Hill
- Scawgill And Blaze Beck
- Scout And Cunswick Scars
- Sea Wood
- Seathwaite Copper Mines
- Seatoller Wood, Sourmilk Gill & Seathwaite Graphite Mine
- Shap Fell Road Cuttings
- Shap Fells
- Shaw Meadow & Sea Pasture
- Short Gill Cave System
- Siddick Pond
- Side Pike
- Silloth Dunes And Mawbray Bank
- Silver Tarn, Hollas And Harnsey Mosses
- Skelghyll Beck
- Skelsmergh Tarn
- Skelton Pasture
- Skelwith Hill
- Skiddaw Group
- Smallcleugh Mine
- Smardale Gill
- South Walney And Piel Channel Flats
- Spadeadam Mires
- St. Bees Head
- Stagmire Moss
- Stanley Ghyll
- Stile End
- Stonethwaite Woods
- Subberthwaite, Blawith and Torver Low Commons
- Sunbiggin Tarn & Moors And Little Asby Scar
- Swindale Beck
- Swindale Meadows
- Swindale Wood
- Tarn Hows
- Tarn Moss
- Tebay Road Cuttings
- Temple Sowerby Moss
- The Clouds
- The Ings
- Thirlmere Woods
- Thornhill Moss & Meadows
- Thornsgill Beck, Mosedale Beck And Wolf Crags
- Throstle Shaw And Sandbeds Fan
- Thurstonfield Lough
- Tilberthwaite Gill
- Town End Meadows, Little Asby
- Troutbeck
- Udford Low Moss
- Underlaid Wood
- Unity Bog
- Upper Dentdale Cave System
- Upper Solway Flats & Marshes
- Waberthwaite Quarry
- Walton Moss
- Wan Fell
- Wart Barrow
- Wasdale Screes
- Wast Water
- Water Crag
- Wedholme Flow
- Wet Sleddale Meadows
- Whitbarrow
- Whitberry Burn
- White Moss, Crosbymoor
- Whitesike Mine And Flinty Fell
- Wilson Place Meadows
- Winster Wetlands
- Yeathouse Quarry
- Yewbarrow Woods
- Yewdale Beck
