| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
1951  | Jumbi Jumbi,Mkorogo | Tanzania, Zanzibar Central/South Kati > Jumbi | third-order administrative division | S 6° 11′ 34'' | E 39° 17′ 53'' |
1952  | Jongowe Jongoe,Jongowe,Jongwe | Tanzania, Zanzibar North Kaskazini A > Tumbatu Jongowe | populated place | S 5° 51′ 0'' | E 39° 13′ 0'' |
| 1953 | Tumbatu Jongowe Jongowe,Tumbatu Jongowe | Tanzania, Zanzibar North Kaskazini A > Tumbatu Jongowe | third-order administrative division | S 5° 50′ 56'' | E 39° 13′ 28'' |
1954  | Jiraue | Tanzania, Manyara | area | S 4° 3′ 0'' | E 35° 20′ 0'' |
1955  | Kibondo Island Jibondo Island,Kibondo Island | Tanzania, Pwani | island | S 8° 3′ 26'' | E 39° 43′ 43'' |
| 1956 | Jengendete | Tanzania, Mbeya | area | S 8° 38′ 0'' | E 34° 37′ 0'' |
| 1957 | Jendele | Tanzania, Zanzibar Central/South Kati > Jendele | third-order administrative division | S 6° 10′ 0'' | E 39° 22′ 38'' |
| 1958 | Jasini Forest Reserve | Tanzania, Tanga | forest reserve | S 5° 23′ 0'' | E 38° 56′ 0'' |
| 1959 | Yasini Jasin,Jasini,Yasini | Tanzania, Tanga Mkinga District Council > Mayomboni | populated place | S 4° 40′ 10'' | E 39° 11′ 36'' |
| 1960 | Jambiani Jambiani,Jembiani | Tanzania, Zanzibar Central/South Kusini > Jambiani | third-order administrative division | S 6° 18′ 32'' | E 39° 32′ 4'' |
| 1961 | Jambangome Jambangome,Jombangome,Jombangoni,Yambagomi | Tanzania, Pemba South Mkoani District > Mizingani | populated place | S 5° 21′ 0'' | E 39° 42′ 0'' |
| 1962 | Izinga Isinga,Izinga,Nsinga | Tanzania, Rukwa | populated place | S 8° 2′ 0'' | E 30° 54′ 0'' |
| 1963 | Iyondo Forest Reserve | Tanzania, Mbeya | forest reserve | S 9° 26′ 0'' | E 33° 31′ 0'' |
| 1964 | Iyondo Forest Reserve | Tanzania, Morogoro | forest reserve | S 8° 10′ 0'' | E 36° 12′ 0'' |
| 1965 | Iwonde Forest Reserve Iwonde Forest Reserve | Tanzania, Morogoro | forest reserve | S 7° 55′ 45'' | E 36° 36′ 42'' |
| 1966 | Iwimbi Iwimbi,Uvirabi,Uwimbi | Tanzania, Dodoma | populated place | S 6° 56′ 0'' | E 35° 23′ 0'' |
| 1967 | Ivuna South Forest Reserve | Tanzania, Mbeya | forest reserve | S 8° 33′ 0'' | E 32° 25′ 0'' |
| 1968 | Ivuna Forest Reserve | Tanzania, Mbeya | forest reserve | S 8° 29′ 0'' | E 32° 26′ 0'' |
| 1969 | Itungi Port Itunge,Itungi,Itungi Port | Tanzania, Mbeya Kyela District Council > Kajunjumele | populated place | S 9° 35′ 0'' | E 33° 56′ 0'' |
| 1970 | Itumba | Tanzania, Songwe Ileje District Council > Itumba | populated place population 13,438 | S 9° 24′ 0'' | E 33° 11′ 0'' |
| 1971 | Itulu Hill Forest Reserve | Tanzania, Tabora | forest reserve | S 6° 20′ 0'' | E 33° 20′ 0'' |
| 1972 | Itope | Tanzania, Mbeya | locality | S 9° 34′ 0'' | E 33° 50′ 0'' |
| 1973 | Itira Forest Reserve | Tanzania, Mara | forest reserve | S 2° 0′ 0'' | E 32° 54′ 0'' |
| 1974 | Itindi | Tanzania, Mbeya | locality | S 8° 38′ 0'' | E 32° 55′ 0'' |
| 1975 | Itindakusya Itindakusia,Itindakusya | Tanzania, Kigoma Uvinza District > Igalula | populated place | S 6° 8′ 3'' | E 30° 9′ 49'' |
| 1976 | Itiaso Hill Itiaso,Itiaso Hill | Tanzania, Katavi Mpanda District > Katuma | hill elevation 1734m | S 6° 14′ 10'' | E 30° 40′ 11'' |
| 1977 | Itetemia Idetemia,Itetemia,Tetemia | Tanzania, Geita Nyang’hwale District Council > Mwingiro | populated place | S 3° 8′ 0'' | E 32° 30′ 0'' |
| 1978 | Itete | Tanzania, Morogoro | locality | S 9° 4′ 0'' | E 36° 11′ 0'' |
| 1979 | Itar Itar,Itare,Itari | Tanzania, Geita Chato District > Muungano | populated place | S 2° 41′ 0'' | E 31° 45′ 0'' |
| 1980 | Itamba Itamba,Tamba | Tanzania, Katavi Mpanda District > Sibwesa | hill | S 6° 36′ 24'' | E 30° 43′ 28'' |
| 1981 | Issenye Isenye,Issenye | Tanzania, Mara Serengeti District Council > Issenye | populated place population 7,778 | S 2° 0′ 0'' | E 34° 20′ 0'' |
| 1982 | Isita | Tanzania, Mbeya | locality | S 8° 37′ 0'' | E 32° 50′ 0'' |
| 1983 | Ishuka Point Ischuka-Spitze,Ishuka Point | Tanzania, Mara Rorya District Council > Nyamagaro | point | S 1° 17′ 0'' | E 33° 54′ 0'' |
| 1984 | Ishbonidamust | Tanzania, Manyara | area | S 4° 35′ 0'' | E 35° 23′ 0'' |
| 1985 | Isangawale | Tanzania, Mbeya | locality | S 8° 26′ 0'' | E 33° 29′ 0'' |
| 1986 | Isalamagasi Isalamagasi,Iselamagazi,Iselomagazi | Tanzania, Shinyanga Shinyanga Rural > Iselamagazi | populated place | S 3° 32′ 0'' | E 33° 8′ 0'' |
| 1987 | Isalala Forest Reserve | Tanzania, Mbeya | forest reserve | S 8° 54′ 0'' | E 32° 38′ 0'' |
| 1988 | Iryenyi Irene,Iryenyi,Makongoro | Tanzania, Mara Rorya District Council > Rabour | hill | S 1° 27′ 0'' | E 34° 4′ 0'' |
| 1989 | Irunda Forest Reserve | Tanzania, Iringa | forest reserve | S 8° 27′ 0'' | E 35° 13′ 0'' |
| 1990 | Irome Irome,Iromue,Kiromue | Tanzania, Morogoro Ulanga District Council > Itete | hill | S 8° 43′ 0'' | E 36° 28′ 0'' |
| 1991 | Iringa Forest Reserve | Tanzania, Iringa | forest reserve | S 7° 45′ 0'' | E 35° 42′ 0'' |
| 1992 | Irenga Forest Reserve | Tanzania, Mbeya | forest reserve | S 8° 57′ 0'' | E 33° 45′ 0'' |
| 1993 | Irambokoma | Tanzania, | area | S 4° 29′ 0'' | E 34° 55′ 0'' |
| 1994 | Ipogoro Ipogoi,Ipogoro,Mapogoro | Tanzania, Mbeya Mbarali District > Miyombweni | populated place | S 8° 18′ 59'' | E 34° 41′ 56'' |
| 1995 | Ipangu | Tanzania, Mbeya | area | S 8° 32′ 0'' | E 33° 58′ 0'' |
| 1996 | Image Forest Reserve Image Forest Reserve | Tanzania, Iringa | forest reserve | S 7° 27′ 35'' | E 36° 10′ 3'' |
| 1997 | Image Image,Imagi | Tanzania, Iringa Kilolo District > Ibumu | populated place | S 7° 27′ 56'' | E 36° 7′ 35'' |
| 1998 | Ilunde Forest Reserve | Tanzania, Kigoma | forest reserve | S 5° 5′ 0'' | E 30° 28′ 0'' |
| 1999 | Ilongafipa Forest Reserve | Tanzania, Mwanza | forest reserve | S 3° 12′ 0'' | E 32° 57′ 0'' |
| 2000 | Ilomero Hill Forest Reserve | Tanzania, Tabora | forest reserve | S 4° 35′ 0'' | E 32° 50′ 0'' |
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