| Ilene | Vestfold, Norway | 79 | 6 | 0 | 1997-09-18 | |
| Ilsvåg | Rogaland, Norway | 19 | 6 | 0 | 1994-11-28 | |
| Imetjønn | Agder, Norway | 2 | 2 | 0 | 1989-10-06 | |
| Inderøy | Nordland, Norway | 11 | 6 | 0 | 1994-11-28 | |
| Indre Lafjord | Agder, Norway | 212 | 7 | 0 | 1995-09-27 | |
| Indre vågetjønn | Vestland, Norway | 1 | 1 | 0 | 1994-08-26 | |
| Indrehavn | Vestfold, Norway | 37 | 6 | 0 | 1993-11-29 | |
| Inndalsvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1994-05-02 | |
| Inndyr | Nordland, Norway | 202 | 7 | 0 | 1999-10-11 | |
| Inndyr | Nordland, Norway | 39 | 6 | 0 | 1994-11-30 | |
| Innlandet | Møre og Romsdal, Norway | 18 | 6 | 0 | 1997-10-15 | |
| Innsmøla | Møre og Romsdal, Norway | 328 | 6 | 0 | 1996-09-19 | |
| Innvik | Vestland, Norway | 216 | 5 | 0 | 1996-10-03 | |
| Isi/Sandvikselva | Akershus, Norway | 1 | 1 | 0 | 2008-10-23 | |
| Isielva 2 | Akershus, Norway | 1 | 1 | 0 | 2008-10-22 | |
| Jansvik | Nordland, Norway | 38 | 6 | 0 | 1995-10-26 | |
| Jarenvannet | Innlandet, Norway | 36 | 15 | 0 | 1996-09-18 | |
| Jerkholmen | Agder, Norway | 100 | 7 | 0 | 1996-09-19 | |
| Jomfruland | Telemark, Norway | 7 | 4 | 0 | 1995-09-07 | |
| Jomfruland | Telemark, Norway | 4 | 3 | 4 | 2013-05-08 | |
| Judaberg | Rogaland, Norway | 105 | 7 | 0 | 1994-12-20 | |
| Justøya | Agder, Norway | 28 | 6 | 0 | 1995-09-08 | |
| Jørstadneset | Rogaland, Norway | 15 | 6 | 0 | 1994-12-01 | |
| Jåbekkvannet | Agder, Norway | 7 | 5 | 0 | 1993-09-27 | |
| Jåsund, Meling, Haga | Rogaland, Norway | 38 | 6 | 0 | 1993-09-28 | |
| Kai ved Vitensenteret i Arendal | Agder, Norway | 2 | 2 | 2 | 2013-03-20 | |
| Kaia ved vitensentert i Arendal | Agder, Norway | 1 | 1 | 1 | 2013-03-20 | |
| Kaldvellfjorden | Agder, Norway | 163 | 7 | 0 | 1998-09-24 | |
| Karl Johans vern | Vestfold, Norway | 20 | 6 | 0 | 1994-09-23 | |
| Karlsfjæra | Vestland, Norway | 2 | 1 | 2 | 2014-10-01 | |
| Karlsvikodden | Vestfold, Norway | 4 | 2 | 0 | 2008-09-09 | |
| Kjeldevatnet | Vestland, Norway | 1 | 1 | 0 | 2023-06-01 | |
| Kjemsjøen | Innlandet, Norway | 40 | 18 | 0 | 1994-06-13 | |
| Kjenestangen | Agder, Norway | 8 | 4 | 0 | 1993-09-24 | |
| Kjerreidviken | Vestland, Norway | 5 | 3 | 5 | 2016-05-10 | |
| Kjerreidviken | Vestland, Norway | 1 | 1 | 0 | 2017-09-28 | |
| Kjøpmannsskjær | Vestfold, Norway | 38 | 7 | 0 | 1993-12-22 | |
| Kleiva | Nordland, Norway | 29 | 6 | 0 | 1993-10-13 | |
| Kleppestø | Vestland, Norway | 59 | 6 | 0 | 1993-09-30 | |
| Klevatn | Nordland, Norway | 4 | 4 | 0 | 1993-09-07 | |
| Klippfiskberget | Troms, Norway | 12 | 5 | 3 | 2013-05-23 | |
| Kloster Halsnøy | Vestland, Norway | 4 | 4 | 0 | 2019-05-23 | |
| Klåmbra-Ryggen | Møre og Romsdal, Norway | 37 | 6 | 0 | 1997-09-22 | |
| Knurrvatnet | Nordland, Norway | 5 | 5 | 0 | 1989-08-30 | |
| Koflekken | Buskerud, Norway | 1 | 1 | 0 | 1995-09-25 | |
| Kolbeinsrød | Vestfold, Norway | 179 | 7 | 0 | 1997-09-09 | |
| Kolbjørnviksjøen | Østfold, Norway | 26 | 12 | 0 | 1991-09-05 | |
| Kolbotnvannet | Akershus, Norway | 13 | 5 | 0 | 1991-06-03 | |
| Kollevåg | Vestland, Norway | 56 | 7 | 0 | 1996-10-02 | |
| Koltjønna | Trøndelag, Norway | 9 | 5 | 0 | 1994-06-02 | |
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