| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Alto Machay | city | Cajamarca | Peru | -6.99 | -78.45 | 12122 | 7757 |
| Alto Madeira | city | Rondonia | Brazil | -8.80 | -63.93 | 265 | 56528 |
| Alto Maderero | city | Guarico | Venezuela | 9.37 | -66.27 | 830 | 4277 |
| Alto Madidi | city | La Paz | Bolivia | -13.63 | -68.74 | 1669 | 0 |
| Alto Mae "A" | city | Maputo | Mozambique | -25.96 | 32.57 | 193 | 316449 |
| Alto Mae "B" | city | Maputo | Mozambique | -25.96 | 32.56 | 3 | 270090 |
| Alto Majagua | city | Chiriqui | Panama | 8.55 | -82.48 | 830 | 9633 |
| Alto Mamelon | city | Piura | Peru | -4.93 | -80.93 | 108 | 5374 |
| Alto Manteca | city | Huanuco | Peru | -8.43 | -76.31 | 1916 | 1618 |
| Alto Maranhao | city | Minas Gerais | Brazil | -20.57 | -43.87 | 3349 | 8630 |
| Alto Maranon | city | Cocle | Panama | 8.30 | -80.62 | 173 | 4888 |
| Alto Maranquiari | city | Junin | Peru | -11.18 | -74.55 | 1738 | 2827 |
| Alto Marcelino | city | Tamaulipas | Mexico | 26.10 | -98.94 | 269 | 1027 |
| Alto Martincito | city | Veraguas | Panama | 8.08 | -80.97 | 203 | 23674 |
| Alto Martín | city | Herrera | Panama | 7.78 | -80.90 | 830 | 2407 |
| Alto Mateo | city | Veracruz | Mexico | 21.53 | -97.38 | 3 | 0 |
| Alto Matzuriniari | city | Junin | Peru | -11.40 | -74.37 | 2047 | 724 |
| Alto Mayo | city | Cauca | Colombia | 1.70 | -77.30 | 3349 | 4555 |
| Alto Mayo | city | San Martin | Peru | -5.70 | -77.47 | 2877 | 1552 |
| Alto Maé ”A” | city | Maputo | Mozambique | -25.96 | 32.57 | 193 | 316449 |
| Alto Maé ”B” | city | Maputo | Mozambique | -25.96 | 32.56 | 3 | 270090 |
| Alto Merecure | city | Miranda | Venezuela | 10.31 | -66.34 | 288 | 26392 |
| Alto Meregilda | city | Ngobe-Bugle | Panama | 8.30 | -81.64 | 1141 | 3947 |
| Alto Mimaso | city | Piaui | Brazil | -5.60 | -42.13 | 328 | 462 |
| Alto Mina | city | Lisboa | Portugal | 39.03 | -9.37 | 187 | 15110 |
| Alto Mincuini | city | Veracruz | Mexico | 21.62 | -98.07 | 147 | 5149 |
| Alto Mineiro | city | Parana | Brazil | -23.26 | -52.64 | 954 | 6928 |
| Alto Mira | city | Arauca | Colombia | 6.36 | -71.80 | 1148 | 298 |
| Alto Miricharo | city | Junin | Peru | -11.03 | -75.01 | 3415 | 2720 |
| Alto Mishquiyacu | city | Amazonas | Peru | -5.76 | -78.33 | 1669 | 3481 |
| Alto Molocue Airport | airport | -15.61 | 37.68 | 1950 | 0 | ||
| Alto Molokwe | city | Zambezia | Mozambique | -15.64 | 37.69 | 1870 | 20958 |
| Alto Molócuè | city | Zambezia | Mozambique | -15.64 | 37.69 | 1870 | 20958 |
| Alto Monte | city | Miranda | Venezuela | 10.29 | -66.83 | 1712 | 79272 |
| Alto Monte Carmelo | city | Tachira | Venezuela | 7.88 | -72.19 | 4225 | 30543 |
| Alto Montilla | city | Los Santos | Panama | 7.57 | -80.60 | 1213 | 2189 |
| Alto Morales | city | Sonora | Mexico | 29.43 | -110.42 | 1207 | 298 |
| Alto Moshoca | city | Huanuco | Peru | -9.63 | -75.49 | 1669 | 298 |
| Alto Mucajaí Airport | airport | 2.77 | -62.22 | 237 | 0 | ||
| Alto Mutabide | city | Zambezia | Mozambique | -17.10 | 37.98 | 160 | 5364 |
| Alto Mutum Preto | city | Espirito Santo | Brazil | -19.27 | -40.90 | 2509 | 3585 |
| Alto México | city | Cocle | Panama | 8.60 | -80.18 | 1922 | 5472 |