- Halldorskvisl, a stream in Northeast
- Hamarsa, a stream in East
- Hamarsfjordur, a bay in East
- Hamravatn, a lake in Northeast
- Hamundarstadavik, a bay in East
- Hareksstadakvisl, a stream in East
- Heradsfloi, a bay in East
- Hestskard, a pass in Westfjords
- Hestur, a hill in Westfjords
- Hjalmeyri, a spit in East
- Hladsbot, a bight in Westfjords
- Hladsvik, a cove in Westfjords
- Hlidarfjall, a hill in Westfjords
- Hljodabunga, an icecap dome in Westfjords
- Hlodur in Westfjords
- Hloduvik in Westfjords
- Hloduvikurskard, a pass in Westfjords
- Hofdaholar in Northwest
- Hofn, a bog in Westfjords
- Hofsa, a stream in Northwest
- Hofur, a rock in Westfjords
- Holar in Westfjords
- Sanda, a distributary in Northeast
- Sandamyri, a bog in South
- Sandfellsfloi, a bog in East
- Sandgil, a stream in Northeast
- Sandhnukavatn, a lake in East
- Sandkrokur, a cove in Northeast
- Sandvatn, a lake in Northeast
- Sandvik, a cove in East
- Sauda, a stream in Northwest
- Saudanesos, an inlet in Northeast
- Saudarvatn, a lake in East
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- Saurbajara, a stream in Northeast
- Saurbajarvatn, a lake in Northeast
- Sela, a stream in East
- Sellakur, a stream in Northeast
- Selland, a bog in East
- Sellond, a bog in East
- Selsa, a stream in East
- Seltjorn, a lake in Northeast
- Selvatn, a lake in Northeast
- Selvik, a cove in East
- Sidugrunn, a bank in South
- Siglufjordur, a fjord in Northeast
- Siglunesgrunn, a bank in Northeast
- Sigurdarstadavik, a bay in Northeast
- Sigurdarstadir in Northeast
- Silfrastadafjall, a spur in Northwest
- Sireksstadir in East
- Sjaland in Northeast
- Sjavarborg in Northwest
- Sjavarmelar, a sand area in South
- Sjohusavik, a cove in Northeast
- Sjonarholl, a hill in South
- Sjoundastadir in Northwest
- Skaftar-Djup, a valley in South
- Skaftaros, a stream mouth in South
- Skagafellshals, a hill in East
- Skagafjardardjup, a valley in Northwest
- Skagafjordur, a bay in Northwest
- Skagagrunn, a bank in Northwest
- Skala in Northwest
- Skalafell, a hill in East
- Skalingur, a peak in East
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