Actun Tunichil Muknal | Monumento natural | BZ Belice | Cayo | 1.8 km² | Ia | — |
| Aguacaliente Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Toledo | — | IV | 1998 |
| Aguacate Lagoon Private Reserve | Humedal | BZ Belice | Cayo | — | VI | — |
Altún Ha | Sitio arqueológico protegido | BZ Belice | Belice | 0.4 km² | VI | — |
| Bacalar Chico National Park | Parque nacional | BZ Belice | Belice | 45.1 km² | V | 1996 |
| Barton Creek Archaeological Reserve | Sitio arqueológico protegido | BZ Belice | Cayo | — | VI | 2009 |
Barton Creek Cave | Monumento natural | BZ Belice | Cayo | — | VI | — |
| Belize Barrier Reef Reserve System | Área marina protegida | BZ Belice | Belice | — | — | 1996 |
| Belize Maya Forest | Reserva forestal | BZ Belice | Orange Walk | — | — | 2021 |
| Bermudian Landing Community Baboon Sanctuary | Refugio de vida silvestre | BZ Belice | Belice | — | IV | 1985 |
| Bladen Nature Reserve | Reserva natural | BZ Belice | Toledo | — | Ia | 1990 |
| Boden Creek Ecological Preserve | Reserva natural | BZ Belice | Toledo | — | — | — |
| Burdon Canal Nature Reserve | Área protegida | BZ Belice | Belice | — | Ia | — |
| Burdon Canal Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Belice | — | Ia | 1992 |
Cahal Pech | Sitio arqueológico protegido | BZ Belice | Cayo | — | — | — |
| Caracol Archaeological Reserve | Sitio arqueológico protegido | BZ Belice | Cayo | — | II | 1995 |
| Caye Bokel Spawning Aggregation Site Reserve | Reserva natural | BZ Belice | Belice | — | IV | 2003 |
| Caye Caulker BTIA Mini Reserve | Reserva natural | BZ Belice | Belice | — | — | — |
| Caye Caulker Marine Reserve | Área marina protegida | BZ Belice | Belice | — | VI | 1998 |
Cayo Sapodilla | Área protegida | BZ Belice | Toledo | 127 km² | IV | 1996 |
| Cementerio de Yarborough | Sitio arqueológico protegido | BZ Belice | Belice | 0.0 km² | VI | 1792 |
| Cerro Maya Archaeological Reserve | Sitio arqueológico protegido | BZ Belice | Corozal | — | VI | 1976 |
Cerros | Sitio arqueológico protegido | BZ Belice | Corozal | — | — | — |
| Chiquibul Forest Reserve | Reserva forestal | BZ Belice | Cayo | 598 km² | VI | 1956 |
| Cockscomb Basin Nature Reserve | Reserva natural | BZ Belice | Stann Creek | — | — | — |
| Corozal Bay Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Corozal | — | IV | 1998 |
Crooked Tree Wildlife Sanctuary | Área protegida | BZ Belice | Belice | 66.4 km² | IV | 1984 |
| Dolphin Park | Parque natural o regional | BZ Belice | Belice | — | II | 2007 |
El Caracol | Sitio arqueológico protegido | BZ Belice | Cayo | — | — | — |
El Pilar (sitio arqueológico) | Sitio arqueológico protegido | BZ Belice | Cayo | 8.1 km² | VI | — |
| Elijio Panti National Park | Parque nacional | BZ Belice | Cayo | — | II | — |
| Gales Point Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Belice | — | IV | 1998 |
Gladden Spit and Silk Cayes Marine Reserve | Área protegida | BZ Belice | — | — | IV | 2000 |
Glover's Reef | Área marina protegida | BZ Belice | — | 308 km² | IV | — |
| Golden Stream Corridor Preserve | Reserva natural | BZ Belice | Toledo | — | IV | 1998 |
| Gra Gra Lagoon National Park | Parque nacional | BZ Belice | Stann Creek | — | II | 2002 |
Gran Agujero Azul | Monumento natural | BZ Belice | Belice | 0.1 km² | III | — |
| Grants Works Forest Reserve | Reserva forestal | BZ Belice | Stann Creek | — | VI | 1941 |
| Hopkins Wetlands Nature Reserve | Humedal | BZ Belice | Stann Creek | — | — | — |
| Krooman Public Reserve | Reserva natural | BZ Belice | Belice | — | — | 2013 |
| Labouring Creek Jaguar Corridor Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Cayo | — | IV | 2009 |
| Lagoon Bank Reserve | Humedal | BZ Belice | Orange Walk | — | — | — |
Lamanai | Sitio arqueológico protegido | BZ Belice | Orange Walk | — | VI | — |
Laughing Bird Caye National Park | Parque nacional | BZ Belice | Stann Creek | 41.0 km² | II | 1996 |
Lubaantún | Sitio arqueológico protegido | BZ Belice | Toledo | — | — | — |
| Machaca Creek Forest Reserve | Reserva forestal | BZ Belice | Toledo | — | VI | 1963 |
| Mahogany Park | Parque natural o regional | BZ Belice | Corozal | — | II | — |
| Manatee Forest Reserve | Reserva forestal | BZ Belice | Belice | — | VI | 1959 |
| Mango Creek Forest Reserve 1 | Reserva forestal | BZ Belice | Stann Creek | — | VI | 1960 |
| Mango Creek Forest Reserve 2 | Reserva forestal | BZ Belice | Stann Creek | — | VI | 1960 |
| Mango Creek Forest Reserve 4 | Reserva forestal | BZ Belice | Stann Creek | — | VI | 1960 |
| Mango Creek Number Four Nature Reserve | Reserva natural | BZ Belice | Stann Creek | — | — | — |
| Mango Creek Number One Nature Reserve | Reserva natural | BZ Belice | Stann Creek | — | — | — |
| Mango Creek Number Three Nature Reserve | Reserva natural | BZ Belice | Stann Creek | — | — | — |
Marco Gonzalez | Sitio arqueológico protegido | BZ Belice | Belice | — | VI | — |
| Maya Mountain Forest Reserve | Reserva forestal | BZ Belice | Toledo | — | VI | 1977 |
| Mayflower Bocawina National Park | Parque nacional | BZ Belice | Stann Creek | 28.7 km² | II | 2001 |
| Melinda National Park | Parque nacional | BZ Belice | Stann Creek | — | II | 2011 |
| Mischner & Bowen Reserve | Reserva natural | BZ Belice | Belice | — | — | 1988 |
| Monkey Bay Private Reserve | Reserva natural | BZ Belice | Belice | — | IV | 1990 |
| Monkey Bay Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Belice | — | II | 1994 |
| Monkey Caye Forest Reserve | Reserva forestal | BZ Belice | Toledo | — | VI | 1996 |
Nim Li Punit | Sitio arqueológico protegido | BZ Belice | Toledo | — | VI | — |
| Nohoch Che'en | Monumento natural | BZ Belice | Cayo | — | — | 2010 |
| North Eastern Biological Corridor | Reserva biológica | BZ Belice | Corozal | — | — | 2020 |
| Parque nacional Aguas Turbias | Parque nacional | BZ Belice | Orange Walk | 35.4 km² | II | 1994 |
Parque nacional Billy Barquedier | Parque nacional | BZ Belice | Stann Creek | 6.6 km² | II | 2001 |
Parque nacional Blue Hole | Parque nacional | BZ Belice | Cayo | 2.7 km² | II | 1986 |
| Parque nacional Chiquibul | Parque nacional | BZ Belice | Cayo | 1,068 km² | II | 1991 |
| Parque nacional de los Cinco Lagos Azules | Parque nacional | BZ Belice | Cayo | 16.4 km² | II | 1994 |
| Parque nacional de Payne's Creek | Parque nacional | BZ Belice | Toledo | 147 km² | II | 1994 |
Parque nacional Guanacaste | Parque nacional | BZ Belice | Cayo | 0.2 km² | II | 1994 |
| Parque nacional Sarstoon Temash | Parque nacional | BZ Belice | Toledo | 169 km² | II | 1994 |
| Parque nacional y reserva marina Bacalar Chico | Área marina protegida | BZ Belice | Belice | 107 km² | IV | 1999 |
| Peccary Hills National Park | Parque nacional | BZ Belice | Belice | 42.6 km² | II | 2007 |
| Preservation Zone | Reserva natural | BZ Belice | Belice | — | IV | 2012 |
| Reserva Forestal Chiquibul | Reserva forestal | BZ Belice | Cayo | — | VI | 1995 |
| Reserva Forestal del Río Columbia | Reserva forestal | BZ Belice | Toledo | — | VI | 1997 |
| Reserva Forestal del Río Sittee | Reserva forestal | BZ Belice | Stann Creek | — | VI | 1977 |
Reserva Forestal Mountain Pine Ridge | Reserva forestal | BZ Belice | Cayo | 431 km² | VI | 1959 |
| Reserva Forestal Vaca | Reserva forestal | BZ Belice | Cayo | — | VI | 1991 |
Reserva marina de Hol Chan | Área protegida | BZ Belice | Belice | — | IV | 1987 |
Reserva marina de Puerto Honduras | Área protegida | BZ Belice | Toledo | — | IV | 2000 |
Reserva natural de Cockscomb | Área protegida | BZ Belice | Stann Creek | 353 km² | IV | 1984 |
| Rio Blanco National Park | Parque nacional | BZ Belice | Toledo | — | II | — |
| Runaway Creek Forest Reserve | Reserva forestal | BZ Belice | Belice | — | IV | 1998 |
Santa Rita Corozal | Sitio arqueológico protegido | BZ Belice | Corozal | — | VI | — |
Serpon Sugar Mill | Sitio arqueológico protegido | BZ Belice | Stann Creek | — | VI | — |
Shipstern | Área protegida | BZ Belice | Corozal | — | II | 1989 |
| Sibun Forest Reserve | Reserva forestal | BZ Belice | Cayo | — | VI | 1959 |
South Water Caye Marine Reserve | Reserva natural | BZ Belice | Stann Creek | 298 km² | — | 1996 |
| Spanish Creek Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Orange Walk | — | IV | 2002 |
| St. George's Caye Mangrove Reserve | Reserva natural | BZ Belice | Belice | — | — | 2005 |
| Swallow Caye Wildlife Sanctuary | Refugio de vida silvestre | BZ Belice | Belice | — | IV | 2002 |
| Swasey Bladen Forest Reserve | Reserva forestal | BZ Belice | Toledo | — | VI | 1960 |
| Tapir Mountain Nature Reserve | Reserva natural | BZ Belice | Cayo | — | Ia | — |
| Thousand Foot Falls Natural Monument | Monumento natural | BZ Belice | Cayo | — | III | 2004 |
| Turneffe Atoll Marine Reserve | Área marina protegida | BZ Belice | Belice | — | — | — |
| Victoria Peak Natural Monument | Monumento natural | BZ Belice | Stann Creek | — | III | 1998 |
| Vincent's Lagoon Special Management Area | Humedal | BZ Belice | Belice | — | IV | 2012 |
Xunantunich | Sitio arqueológico protegido | BZ Belice | Cayo | — | VI | — |