| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Madras Settlement | city | County of Caroni | Trinidad and Tobago | 10.55 | -61.3333333 | 91 | 52159 |
| Mairad Village | city | County of Victoria | Trinidad and Tobago | 10.2666667 | -61.2666667 | 180 | 20965 |
| Malabar Settlement | city | County of Saint George | Trinidad and Tobago | 10.6166667 | -61.2833333 | 193 | 62051 |
| Mamon | city | County of Saint Andrew | Trinidad and Tobago | 10.4666667 | -61.15 | 242 | 12806 |
| Mamoral | city | County of Caroni | Trinidad and Tobago | 10.45 | -61.2833333 | 255 | 27950 |
| Mamural | city | County of Caroni | Trinidad and Tobago | 10.45 | -61.2833333 | 255 | 27950 |
| Manahambre | city | County of Victoria | Trinidad and Tobago | 10.2666667 | -61.3833333 | 170 | 82283 |
| Manahambre Village | city | County of Victoria | Trinidad and Tobago | 10.2666667 | -61.3833333 | 170 | 82283 |
| Marabella | city | San Fernando | Trinidad and Tobago | 10.3 | -61.45 | 9 | 65640 |
| Maracas | city | County of Saint George | Trinidad and Tobago | 10.6833333 | -61.4 | 1906 | 116169 |
| Maracas Bay Village | city | County of Saint George | Trinidad and Tobago | 10.75 | -61.4333333 | 1486 | 108605 |
| Maracas Village | city | County of Saint George | Trinidad and Tobago | 10.6833333 | -61.4 | 1906 | 116169 |
| Maraval | city | County of Saint George | Trinidad and Tobago | 10.7 | -61.5166667 | 702 | 105087 |
| Mary's Hill | city | Ward of Tobago | Trinidad and Tobago | 11.2 | -60.75 | 249 | 14611 |
| Maryʼs Hill | city | Ward of Tobago | Trinidad and Tobago | 11.2 | -60.75 | 249 | 14611 |
| Mason Hall | city | Ward of Tobago | Trinidad and Tobago | 11.2166667 | -60.7166667 | 416 | 14962 |
| Matelot | city | County of Saint David | Trinidad and Tobago | 10.8166667 | -61.1166667 | 643 | 2379 |
| Matura | city | County of Saint Andrew | Trinidad and Tobago | 10.6666667 | -61.0666667 | 68 | 6138 |
| Maturita | city | County of Saint George | Trinidad and Tobago | 10.6333333 | -61.2666667 | 232 | 79968 |
| Mayo | city | County of Victoria | Trinidad and Tobago | 10.35 | -61.3833333 | 219 | 63067 |
| Mc Bean | city | County of Caroni | Trinidad and Tobago | 10.45 | -61.45 | 262 | 50398 |
| Mc Bean Village | city | County of Caroni | Trinidad and Tobago | 10.45 | -61.45 | 262 | 50398 |
| Merchiston | city | Ward of Tobago | Trinidad and Tobago | 11.2666667 | -60.5333333 | 3 | 8190 |
| Mesopotamia | city | Ward of Tobago | Trinidad and Tobago | 11.1833333 | -60.6833333 | 0 | 13332 |
| Mitan | city | County of Saint Andrew | Trinidad and Tobago | 10.45 | -61.1166667 | 275 | 13864 |
| Mon Plaisir | city | County of Caroni | Trinidad and Tobago | 10.5666667 | -61.3833333 | 52 | 65768 |
| Mon Repos | city | San Fernando | Trinidad and Tobago | 10.2666667 | -61.45 | 36 | 83300 |
| Monkey Town | city | County of Victoria | Trinidad and Tobago | 10.2 | -61.4166667 | 101 | 73286 |
| Monkey Town | city | County of Victoria | Trinidad and Tobago | 10.2666667 | -61.3333333 | 255 | 34350 |
| Monkey Town Village | city | County of Victoria | Trinidad and Tobago | 10.2 | -61.4166667 | 101 | 73286 |
| Monte Video | city | County of Saint David | Trinidad and Tobago | 10.8166667 | -61.0333333 | 498 | 4535 |
| Montgomery | city | Ward of Tobago | Trinidad and Tobago | 11.1833333 | -60.7833333 | 213 | 12500 |
| Montrose | city | County of Caroni | Trinidad and Tobago | 10.5166667 | -61.4 | 288 | 69315 |
| Montrose | city | Ward of Tobago | Trinidad and Tobago | 11.2 | -60.65 | 226 | 9914 |
| Montserrat Village | city | County of Victoria | Trinidad and Tobago | 10.35 | -61.3833333 | 219 | 63067 |
| Moos | city | County of Victoria | Trinidad and Tobago | 10.2666667 | -61.2666667 | 180 | 20965 |
| Moque Point | city | County of Saint Patrick | Trinidad and Tobago | 10.0666667 | -61.45 | 0 | 19504 |
| Moriah | city | Ward of Tobago | Trinidad and Tobago | 11.25 | -60.7166667 | 695 | 14962 |
| Moriah Village | city | Ward of Tobago | Trinidad and Tobago | 11.25 | -60.7166667 | 695 | 14962 |
| Morichal | city | County of Victoria | Trinidad and Tobago | 10.35 | -61.35 | 246 | 51568 |
| Morne Cabrite | city | County of Saint David | Trinidad and Tobago | 10.8 | -60.9333333 | 0 | 2594 |
| Morne Diablo | city | County of Saint Patrick | Trinidad and Tobago | 10.1 | -61.45 | 193 | 35250 |
| Morne Quiton | city | Ward of Tobago | Trinidad and Tobago | 11.1833333 | -60.7333333 | 291 | 14611 |
| Moruga | city | County of Victoria | Trinidad and Tobago | 10.0833333 | -61.2833333 | 0 | 2123 |
| Moruga Village | city | County of Victoria | Trinidad and Tobago | 10.0833333 | -61.2833333 | 0 | 2123 |
| Morvant | city | County of Saint George | Trinidad and Tobago | 10.65 | -61.4666667 | 75 | 99230 |
| Mount Dillon | city | Ward of Tobago | Trinidad and Tobago | 11.2666667 | -60.7 | 1368 | 13671 |
| Mount Dillon River | city | Ward of Tobago | Trinidad and Tobago | 11.2666667 | -60.7 | 1368 | 13671 |
| Mount Grace | city | Ward of Tobago | Trinidad and Tobago | 11.1833333 | -60.75 | 3 | 14611 |
| Mount Harris | city | County of Saint Andrew | Trinidad and Tobago | 10.5 | -61.1166667 | 308 | 16674 |
| Mount Pleasant | city | County of Saint George | Trinidad and Tobago | 10.7166667 | -61.6166667 | 308 | 59947 |
| Mount Pleasant | city | Ward of Tobago | Trinidad and Tobago | 11.15 | -60.8 | 16 | 6749 |
| Mount Saint George | city | Ward of Tobago | Trinidad and Tobago | 11.2 | -60.6833333 | 393 | 13332 |
| Mount Saint George Village | city | Ward of Tobago | Trinidad and Tobago | 11.2 | -60.6833333 | 393 | 13332 |
| Mount Stewart | city | County of Victoria | Trinidad and Tobago | 10.2833333 | -61.4 | 108 | 82283 |
| Mount Stewart Village | city | County of Victoria | Trinidad and Tobago | 10.2833333 | -61.4 | 108 | 82283 |
| Mount Thomas | city | Ward of Tobago | Trinidad and Tobago | 11.2333333 | -60.7333333 | 311 | 14962 |
| Mucurapo | city | County of Saint Andrew | Trinidad and Tobago | 10.6666667 | -61.5333333 | 68 | 105087 |
| Mundo Nuevo | city | County of Saint George | Trinidad and Tobago | 10.4666667 | -61.25 | 246 | 18046 |
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