Ilybius montanus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Dytiscidae
- genus: Ilybius
- species: Ilybius montanus
- Prosperous
Leinster
Ireland- De Horst
Gelderland
Netherlands- Bagshot
- Bakewell
- Bedlington
- Bollington
- Bordon
- Bovey Tracey
- Bradfield
- Bransgore
- Braunton
- Breighton
- Brockenhurst
- Bubwith
- Bucknell
- Bugle
- Burgess Hill
- Burley in Wharfedale
- Burnopfield
- Cadnam
- Camblesforth
- Carlisle
- Castleford
- Chigwell
- Chislehurst
- Copmanthorpe
- Cramlington
- Croston
- Deighton
- Dinnington
- Doddington
- Drybrook
- East Harling
- East Molesey
- Elstead
- Esher
- Farnham Royal
- Ferndown
- Fleet
- Forest Row
- Golborne
- Goostrey
- Gravesend
- Great Bookham
- Griston
- Guilden Sutton
- Hatfield
- Haywards Heath
- Hazlerigg
- Hemingbrough
- Heslington
- Hetton le Hole
- Hinchley Wood
- Holmes Chapel
- Hook
- Houghton-le-Spring
- Howden
- Ilkley
- Kingsley
- Kinnersley
- Knaphill
- Landewednack
- Ledston
- Liss
- Lytchett Matravers
- Melbourne
- Mickle Trafford
- Midhurst
- Millom
- Mitcham
- Mitcheldean
- Moreton
- Murton
- Newton-le-Willows
- Normandy
- Otterburn
- Over
- Pelton
- Pickering
- Pott Shrigley
- Ripley
- Robertsbridge
- Rochester
- Rowlands Gill
- Royal Tunbridge Wells
- Royal Wootton Bassett
- Rye
- Ryhill
- Sacriston
- Saint Albans
- Sawtry
- Scotter
- Seascale
- Sennen
- Shafton
- Shiremoor
- South Bank
- South Hetton
- South Nutfield
- St. Buryan
- Stoke
- Strensall
- Sunningdale
- Sway
- Tadley
- Thames Ditton
- The Boldons
- Theydon Bois
- Thornton
- Three Legged Cross
- Tilbury
- Tonbridge
- Totton
- Tow Law
- Wandsworth
- Wentworth
- West Rainton
- Willaston
- Windlesham
- Witton Gilbert
- Woking
- Wool
England- Newtownards
Northern Ireland
United Kingdom