| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ajalvir | city | Madrid | Spain | 40.53 | -3.48 | 2509 | 49241 |
| Alalpardo | city | Madrid | Spain | 40.63 | -3.47 | 2509 | 12791 |
| Alameda de Osuna | city | Madrid | Spain | 40.45 | -3.59 | 1932 | 469233 |
| Alameda del Valle | city | Madrid | Spain | 40.92 | -3.84 | 3589 | 730 |
| Alcala de Henares | city | Madrid | Spain | 40.48 | -3.36 | 1971 | 133270 |
| Alcobendas | city | Madrid | Spain | 40.54 | -3.64 | 2080 | 257481 |
| Alcorconum | city | Madrid | Spain | 40.35 | -3.82 | 2509 | 407958 |
| Alcorcón | city | Madrid | Spain | 40.35 | -3.82 | 2509 | 407958 |
| Alcovendae | city | Madrid | Spain | 40.54 | -3.64 | 2080 | 257481 |
| Aldea del Fresno | city | Madrid | Spain | 40.32 | -4.20 | 1669 | 3103 |
| Aldehuela | city | Madrid | Spain | 40.30 | -3.59 | 1879 | 147680 |
| Algete | city | Madrid | Spain | 40.60 | -3.50 | 2509 | 20228 |
| Alkala de Henaresas | city | Madrid | Spain | 40.48 | -3.36 | 1971 | 133270 |
| Alkobendasas | city | Madrid | Spain | 40.54 | -3.64 | 2080 | 257481 |
| Alkorkonas | city | Madrid | Spain | 40.35 | -3.82 | 2509 | 407958 |
| Alkorkono | city | Madrid | Spain | 40.35 | -3.82 | 2509 | 407958 |
| Alpedrete | city | Madrid | Spain | 40.66 | -4.03 | 2864 | 54858 |
| Ambite | city | Madrid | Spain | 40.33 | -3.18 | 2509 | 2419 |
| Ambroz | city | Madrid | Spain | 40.42 | -3.58 | 2047 | 456274 |
| Anchuelo | city | Madrid | Spain | 40.47 | -3.27 | 2831 | 15542 |
| Aorlos | city | Madrid | Spain | 41.06 | -3.60 | 3395 | 877 |
| Aorroyomolinos | city | Madrid | Spain | 40.27 | -3.92 | 1998 | 97979 |
| Aoslos | city | Madrid | Spain | 41.06 | -3.60 | 3395 | 877 |
| Apeadero de Los Molinos-Guadarrama | city | Madrid | Spain | 40.71 | -4.07 | 3480 | 20892 |
| Aranchuesas | city | Madrid | Spain | 40.03 | -3.60 | 1811 | 27832 |
| Aranguesia | city | Madrid | Spain | 40.03 | -3.60 | 1811 | 27832 |
| Aranjuez | city | Madrid | Spain | 40.03 | -3.60 | 1811 | 27832 |
| Aravaca | city | Madrid | Spain | 40.46 | -3.78 | 2011 | 370475 |
| Arganda | city | Madrid | Spain | 40.30 | -3.44 | 2509 | 34180 |
| Arganda del Rey | city | Madrid | Spain | 40.30 | -3.44 | 2509 | 34180 |
| Arroyomolinos | city | Madrid | Spain | 40.27 | -3.92 | 1998 | 97979 |
| Atazar | city | Madrid | Spain | 40.93 | -3.47 | 3349 | 284 |