- Hadlow Down, Wealden District, East Sussex
- Hailsham, Wealden District, East Sussex
- Halland, near East Hoathly, East Sussex
- Halnaker, Chichester District, West Sussex
- Hamsey, Lewes District, East Sussex
- Handcross, Mid Sussex District, West Sussex
- Hangleton, Hove, The City of Brighton and Hove
- Hardham, Horsham District, West Sussex
- Hartfield, Wealden District, East Sussex
- Harting, Chichester District, West Sussex
- Hassocks, Mid Sussex District, West Sussex
- Hastings, East Sussex
- Hastings: Guides and directories
- Haywards Heath, Mid Sussex District, West Sussex
- Heathfield, Wealden District, East Sussex
- Heene, Borough of Worthing, West Sussex
- Heighton, Lewes District, East Sussex
- Hellingly, Wealden District, East Sussex
- Henfield, Horsham District, West Sussex
- Henley, Chichester District, West Sussex
- Heron's Ghyll, Wealden District, East Sussex
- Herstmonceux, Wealden District, East Sussex
- Heyshott, Chichester District, West Sussex
- Hickstead (aka Hixstead), Mid Sussex District, West Sussex
- High Hurstwood, Wealden District, East Sussex
- Highbrook, West Hoathly, Mid Sussex District, West Sussex
- Highdown Hill, Arun District, West Sussex
- Hollingbury, The City of Brighton and Hove
- Hollington, Hastings District, East Sussex
- Holmestrow, The hundred of
- Holtye, Wealden District, East Sussex
- Hooe, Wealden District, East Sussex
- Horam, Wealden District, East Sussex
- Horselunges Manor, near Hellingly, East Sussex
- Horsham, West Sussex
- Horsham: Christ's Hospital
- Horsham: Guides and directories
- Horsted Keynes, Mid Sussex District, West Sussex
- Houghton, Arun District, West Sussex
- Hove, The City of Brighton and Hove
- Hunston, Chichester District, West Sussex
- Hurst Green, Rother District, East Sussex
- Hurst, Chichester District, West Sussex
- Hurstpierpoint, Mid Sussex District, West Sussex
- Hydneye, East Sussex
- Hythe, East Sussex
