| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Baezuela | city | Madrid | Spain | 40.45 | -3.43 | 1850 | 151692 |
| Barajas | city | Madrid | Spain | 40.47 | -3.58 | 1906 | 408617 |
| Barajas Madrid | city | Madrid | Spain | 40.47 | -3.58 | 1906 | 408617 |
| Barajas de Madrid | city | Madrid | Spain | 40.47 | -3.58 | 1906 | 408617 |
| Barrio Ciudad Lineal | city | Madrid | Spain | 40.45 | -3.65 | 2509 | 458597 |
| Barrio Colonia Alfar | city | Madrid | Spain | 40.45 | -3.79 | 2509 | 326485 |
| Barrio El Goloso | city | Madrid | Spain | 40.55 | -3.70 | 2509 | 347518 |
| Barrio Humera | city | Madrid | Spain | 40.42 | -3.78 | 2509 | 354770 |
| Barrio La Alameda de Osuna | city | Madrid | Spain | 40.45 | -3.59 | 1932 | 469233 |
| Barrio La Estacion | city | Madrid | Spain | 40.63 | -4.01 | 2926 | 70690 |
| Barrio La Huerta del Obispo | city | Madrid | Spain | 40.46 | -3.71 | 2509 | 460112 |
| Barrio La Marañosa | city | Madrid | Spain | 40.27 | -3.59 | 2050 | 63833 |
| Barrio La Poveda | city | Madrid | Spain | 40.30 | -3.47 | 1998 | 41051 |
| Barrio Las Monoteras | city | Madrid | Spain | 40.49 | -3.67 | 2509 | 420271 |
| Barrio Los Hueros | city | Madrid | Spain | 40.44 | -3.35 | 2509 | 69475 |
| Barrio Moratalaz | city | Madrid | Spain | 40.40 | -3.64 | 2509 | 460794 |
| Barrio Obrero Las Matas | city | Madrid | Spain | 40.56 | -3.89 | 2509 | 159180 |
| Barrio Pajares | city | Madrid | Spain | 40.55 | -4.17 | 3392 | 8081 |
| Barrio Pavones | city | Madrid | Spain | 40.40 | -3.63 | 2509 | 461957 |
| Barrio Peña Grande | city | Madrid | Spain | 40.47 | -3.72 | 2509 | 459785 |
| Barrio Pueblo Nuevo-Ventas | city | Madrid | Spain | 40.43 | -3.63 | 2509 | 463877 |
| Barrio Puente de Vallecas | city | Madrid | Spain | 40.39 | -3.66 | 2509 | 460574 |
| Barrio Puente-Viveros | city | Madrid | Spain | 40.45 | -3.53 | 1797 | 277503 |
| Barrio Rosales | city | Madrid | Spain | 40.35 | -3.68 | 1804 | 402754 |
| Barrio Valdeconejos | city | Madrid | Spain | 40.47 | -3.72 | 2509 | 459785 |
| Barrio de la Estacion | city | Madrid | Spain | 40.58 | -3.96 | 2791 | 48731 |
| Batres | city | Madrid | Spain | 40.21 | -3.92 | 2050 | 10443 |
| Becerril de la Sierra | city | Madrid | Spain | 40.72 | -3.99 | 3369 | 15379 |
| Belmonte de Tajo | city | Madrid | Spain | 40.13 | -3.34 | 2509 | 3708 |
| Belvis | city | Madrid | Spain | 40.56 | -3.55 | 2080 | 59610 |
| Belvis de Jarama | city | Madrid | Spain | 40.56 | -3.55 | 2080 | 59610 |
| Berzosa del Lozoya | city | Madrid | Spain | 40.97 | -3.52 | 4189 | 547 |
| Boadilla del Monte | city | Madrid | Spain | 40.40 | -3.88 | 2509 | 122886 |
| Boalo | city | Madrid | Spain | 40.72 | -3.92 | 3349 | 7976 |
| Braojos | city | Madrid | Spain | 41.04 | -3.64 | 3631 | 1414 |
| Brea | city | Madrid | Spain | 40.23 | -3.11 | 2509 | 1038 |
| Brea de Tajo | city | Madrid | Spain | 40.23 | -3.11 | 2509 | 1038 |
| Brunete | city | Madrid | Spain | 40.41 | -4.00 | 2040 | 19293 |
| Buitrago | city | Madrid | Spain | 40.99 | -3.63 | 3349 | 2183 |
| Buitrago de Lozoya | city | Madrid | Spain | 40.99 | -3.63 | 3349 | 2183 |
| Buitrago del Lozoya | city | Madrid | Spain | 40.99 | -3.63 | 3349 | 2183 |
| Buitrago del Lozoyo | city | Madrid | Spain | 40.99 | -3.63 | 3349 | 2183 |
| Bustarviejo | city | Madrid | Spain | 40.86 | -3.71 | 3671 | 2309 |