The 1st parallel south is a circle of latitude that is 1 degree (69.2 miles/111.36 kilometers)south of the Earth's equatorial plane. It crosses the Atlantic Ocean, Africa, the Indian Ocean, Southeast Asia, Australasia, the Pacific Ocean and South America.
The parallel defines most of the border between Uganda and Tanzania, and a very short section of the border between Kenya and Tanzania.[1]
Starting at the Prime Meridian and heading eastwards, the parallel 1° south passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Atlantic Ocean | ||
| / border | Mostly in Lake Victoria | |
| / border | A short section of the border (about), entirely within Lake Victoria | |
| Passing about north of the capital, Nairobi | ||
| Indian Ocean | Passing just south of Addu Atoll, | |
| Island of Siberut | ||
| Mentawai Strait | ||
| Island of Sumatra - passing just south of Padang | ||
| Karimata Strait | ||
| Islands of Maya Karimata and Borneo West Kalimantan Central Kalimantan East Kalimantan Passing just south of Nusantara (at) | ||
| Makassar Strait | ||
| Island of Sulawesi | ||
| Gulf of Tomini | ||
| Island of Sulawesi | ||
| Banda Sea | ||
| Island of Sulawesi | ||
| Molucca Sea | ||
| Island of Damar | ||
| Halmahera Sea | ||
| Islands of Salawati and New Guinea | ||
| Cenderawasih Bay | ||
| Island of Numfor | ||
| Cenderawasih Bay | ||
| Island of Biak | ||
| Pacific Ocean | Passing just north of the atolls of Pelleluhu and Heina, Passing just south of the Kaniet Islands, Passing just south of Banaba Island, Passing between the atolls of Nonouti and Tabiteuea, | |
| Island of Isabela | ||
| Pacific Ocean | Passing just south of the island of San Cristóbal, | |
| Passing just south of Manta | ||
| Amazonas Roraima Amazonas Pará Amapá Maranhão Pará - islands of Grande do Gurupá and Marajó, and the mainland | ||
| Atlantic Ocean | ||