| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
1801  | Isesia Isesia | Tanzania, Katavi Mpanda District > Ikola | hill | S 6° 37′ 41'' | E 30° 20′ 9'' |
| 1802 | Isanja | Tanzania, Tabora Sikonge District > Usunga | hill | S 5° 42′ 0'' | E 33° 1′ 0'' |
| 1803 | Isanga | Tanzania, Shinyanga Shinyanga Urban > Mwawaza | hill | S 3° 42′ 0'' | E 33° 19′ 0'' |
| 1804 | Irundi | Tanzania, Iringa Mafinga Town Council > Sao Hill | hill | S 8° 27′ 0'' | E 35° 15′ 0'' |
| 1805 | Irumiru | Tanzania, Tabora Nzega District Council > Utwigu | hill | S 4° 25′ 0'' | E 33° 1′ 0'' |
| 1806 | Iruma Island | Tanzania, Mara | island | S 1° 41′ 0'' | E 33° 24′ 0'' |
| 1807 | Iroba Island | Tanzania, Kagera | island | S 1° 47′ 0'' | E 31° 50′ 0'' |
| 1808 | Iringa | Tanzania, Mara Musoma District Council > Bulinga | hill | S 1° 49′ 0'' | E 33° 23′ 0'' |
| 1809 | Iriga Island | Tanzania, Mara | island | S 1° 31′ 0'' | E 33° 37′ 0'' |
| 1810 | Iriga | Tanzania, Katavi Mpanda District > Mishamo | hill | S 5° 24′ 0'' | E 30° 21′ 0'' |
| 1811 | Irekwa | Tanzania, Singida Manyoni District Council > Mwamagembe | hill | S 6° 25′ 0'' | E 34° 10′ 0'' |
| 1812 | Iramba Plateau | Tanzania, Singida | upland | S 4° 25′ 0'' | E 34° 22′ 0'' |
| 1813 | Iputa | Tanzania, Dodoma Mpwapwa District Council > Galigali | mountain | S 6° 54′ 0'' | E 36° 33′ 0'' |
| 1814 | Ipungulu Ipungulu | Tanzania, Rukwa | hill | S 6° 54′ 35'' | E 30° 46′ 44'' |
| 1815 | Ipunga | Tanzania, Songwe Mbozi District Council > Ipunga | hill | S 9° 8′ 0'' | E 32° 47′ 0'' |
| 1816 | Ipumba Ipumba | Tanzania, Katavi Mpanda District > Mishamo | hill | S 5° 59′ 0'' | E 30° 28′ 0'' |
| 1817 | Ipuli | Tanzania, Singida Ikungi District Council > Issuna | hill | S 5° 21′ 0'' | E 34° 55′ 0'' |
| 1818 | Ipito Hill | Tanzania, Mbeya Chunya District Council > Kambikatoto | hill | S 7° 16′ 0'' | E 33° 31′ 0'' |
| 1819 | Ipiri | Tanzania, Manyara Babati Town > Bonga | hill | S 4° 19′ 0'' | E 35° 46′ 0'' |
| 1820 | Ipanza | Tanzania, Tabora Kaliua District Council > Zugimlole | hill | S 5° 20′ 0'' | E 31° 41′ 0'' |
| 1821 | Ipanga | Tanzania, Simiyu Bariadi District Council > Mwadobana | hill | S 2° 35′ 0'' | E 34° 5′ 0'' |
| 1822 | Ipalanganga | Tanzania, Morogoro Ulanga District Council > Iragua | hill | S 8° 31′ 0'' | E 36° 33′ 0'' |
| 1823 | Inolo | Tanzania, Dodoma Mpwapwa District Council > Luhundwa | hill | S 6° 47′ 0'' | E 36° 26′ 0'' |
| 1824 | Inner Sinda | Tanzania, Dar es Salaam Region | island | S 6° 49′ 30'' | E 39° 23′ 39'' |
| 1825 | Inner Makatumbe | Tanzania, Dar es Salaam Region | island | S 6° 47′ 57'' | E 39° 19′ 53'' |
| 1826 | Imalange | Tanzania, Shinyanga Kahama Rural District > Sabasabini | hill | S 3° 57′ 0'' | E 32° 16′ 0'' |
| 1827 | Imalakaseka | Tanzania, Shinyanga Kahama Rural District > Igwamanoni | hill | S 3° 47′ 0'' | E 32° 10′ 0'' |
| 1828 | Imagi | Tanzania, Dodoma Dodoma Urban District > Ntyuka | hill | S 6° 12′ 55'' | E 35° 44′ 46'' |
| 1829 | Ilyandi Sandy Ridge Ilyandi Sandy Ridge | Tanzania, Katavi | ridge(s) | S 6° 43′ 0'' | E 31° 0′ 31'' |
| 1830 | Ilunga Range | Tanzania, Mbeya | hills | S 8° 20′ 0'' | E 33° 0′ 0'' |
| 1831 | Ilundi | Tanzania, Mbeya Chunya District Council > Itewe | hill | S 8° 32′ 0'' | E 33° 20′ 0'' |
| 1832 | Ilundi | Tanzania, Dodoma Kongwa > Chamkoroma | hill | S 6° 21′ 0'' | E 36° 41′ 0'' |
| 1833 | Iluma | Tanzania, Singida Manyoni District Council > Sasilo | hill | S 6° 19′ 0'' | E 34° 43′ 0'' |
| 1834 | Iluli | Tanzania, Singida Manyoni District Council > Isseke | hill | S 6° 42′ 0'' | E 34° 44′ 0'' |
| 1835 | Ilowi | Tanzania, Dodoma Mpwapwa District Council > Mima | hill | S 6° 33′ 0'' | E 36° 5′ 0'' |
| 1836 | Ilomo | Tanzania, Songwe Songwe District > Kapalala | hill | S 8° 2′ 0'' | E 32° 34′ 0'' |
| 1837 | Ilomero | Tanzania, Tabora Nzega District Council > Milambo Itobo | hill | S 4° 44′ 0'' | E 32° 57′ 0'' |
| 1838 | Ilomba | Tanzania, Songwe Momba District Council > Chitete | hill | S 8° 47′ 0'' | E 32° 32′ 0'' |
| 1839 | Ilolo | Tanzania, Iringa Iringa Rural District > Migoli | hill | S 7° 5′ 0'' | E 35° 43′ 0'' |
| 1840 | Ilole Ilole | Tanzania, Dodoma Mpwapwa District Council > Ipera | hill | S 7° 8′ 0'' | E 36° 28′ 0'' |
| 1841 | Ilima Hill | Tanzania, Mbeya Rungwe District Council > Ilima | hill | S 9° 27′ 0'' | E 33° 41′ 0'' |
| 1842 | Ilege | Tanzania, Shinyanga Kahama Rural District > Bulungwa | hill | S 3° 57′ 0'' | E 32° 11′ 0'' |
| 1843 | Ilangala | Tanzania, Tanga Kilindi District > Pagwi | hill | S 5° 57′ 0'' | E 37° 10′ 0'' |
| 1844 | Ilalanguru | Tanzania, Songwe Mbozi District Council > Nambinzo | hill | S 8° 43′ 0'' | E 32° 37′ 0'' |
| 1845 | Ikusu Ikusu | Tanzania, Katavi Mpanda District > Mwese | hill | S 6° 0′ 0'' | E 30° 26′ 0'' |
| 1846 | Ikuse | Tanzania, Katavi Mpanda District > Mpandandogo | hill | S 5° 52′ 0'' | E 30° 43′ 0'' |
| 1847 | Ikuru Island | Tanzania, Mwanza | island | S 2° 15′ 0'' | E 32° 33′ 0'' |
| 1848 | Ikunwa | Tanzania, Dodoma Kongwa > Nghumbi | hill | S 6° 14′ 0'' | E 36° 49′ 0'' |
| 1849 | Ikungu | Tanzania, Mwanza Misungwi district > Misasi | hill | S 3° 0′ 0'' | E 33° 2′ 0'' |
| 1850 | Ikowe | Tanzania, Songwe Songwe District > Gua | hill | S 7° 43′ 0'' | E 32° 17′ 0'' |
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