| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Iberia | city | Tamaulipas | Mexico | 22.75 | -98.68 | 114 | 894 |
| Ideal del Campesino | city | Tamaulipas | Mexico | 26.16 | -98.57 | 141 | 2495 |
| Ignacio Allende | city | Tamaulipas | Mexico | 24.06 | -99.21 | 830 | 1229 |
| Ignacio Allende | city | Tamaulipas | Mexico | 23.24 | -99.18 | 994 | 867 |
| Ignacio Allende | city | Tamaulipas | Mexico | 22.80 | -99.04 | 223 | 14515 |
| Ignacio Allende | city | Tamaulipas | Mexico | 23.71 | -99.13 | 1118 | 87355 |
| Ignacio Manuel Altamirano | city | Tamaulipas | Mexico | 25.89 | -97.82 | 65 | 2314 |
| Ignacio Manuel Altamirano | city | Tamaulipas | Mexico | 22.78 | -98.89 | 167 | 15631 |
| Ignacio Zaragoza | city | Tamaulipas | Mexico | 23.19 | -98.78 | 830 | 894 |
| Ignacio Zaragoza | city | Tamaulipas | Mexico | 25.87 | -97.62 | 29 | 76498 |
| Ignacio Zaragoza | city | Tamaulipas | Mexico | 23.99 | -98.20 | 236 | 449 |
| Imperial | city | Tamaulipas | Mexico | 23.75 | -99.17 | 1115 | 88030 |
| Independencia | city | Tamaulipas | Mexico | 24.30 | -98.55 | 830 | 447 |
| Independencia | city | Tamaulipas | Mexico | 25.65 | -98.03 | 65 | 1049 |
| Independencia | city | Tamaulipas | Mexico | 24.23 | -99.52 | 1669 | 1192 |
| Independencia | city | Tamaulipas | Mexico | 23.30 | -98.96 | 830 | 894 |
| Independencia | city | Tamaulipas | Mexico | 23.21 | -98.67 | 898 | 894 |
| Independencia | city | Tamaulipas | Mexico | 22.97 | -98.97 | 278 | 7215 |
| Independencia | city | Tamaulipas | Mexico | 23.74 | -99.12 | 918 | 88040 |
| Independencia y Revolución | city | Tamaulipas | Mexico | 22.77 | -98.76 | 190 | 894 |
| Indio | city | Tamaulipas | Mexico | 27.63 | -99.63 | 396 | 18934 |
| Industrial | city | Tamaulipas | Mexico | 22.97 | -98.95 | 288 | 7973 |
| Insurgentes | city | Tamaulipas | Mexico | 23.75 | -99.12 | 912 | 88031 |
| Integracion Familiar | city | Tamaulipas | Mexico | 23.72 | -99.12 | 1095 | 88010 |
| Isidro | city | Tamaulipas | Mexico | 25.68 | -97.77 | 45 | 20509 |
| Isla Loma de Agua | city | Tamaulipas | Mexico | 24.97 | -97.59 | 0 | 32 |
| Isla el Carrizal | city | Tamaulipas | Mexico | 24.95 | -97.61 | 3 | 23 |
| Ivaro Obregon | city | Tamaulipas | Mexico | 24.48 | -99.58 | 1827 | 605 |
| Izaguirre | city | Tamaulipas | Mexico | 24.15 | -99.28 | 830 | 1192 |