| Name | Siena |
| Province ID | 117 |
| Continent | Europe |
| Super region | Western Europe |
| Region | Italy |
| Area | Tuscany |
| Development | 15 |
| Base Tax | 6 |
| Base Production | 6 |
| Base Manpower | 3 |
| Trade node | Malacca |
| Modifiers | Natural Harbor |
| Owner | Siena |
| Culture | Tuscan |
| Culture Group | Latin |
Here are the IDs of provinces that in on the same region as Siena:
| Province | Province ID |
|---|---|
| Abruzzi | 120 |
| Albenga | 2992 |
| Ancona | 119 |
| Arborea | 4735 |
| Arezzo | 2978 |
| Avellino | 4734 |
| Bari | 1933 |
| Bergamo | 4739 |
| Bologna | 4730 |
| Brescia | 107 |
| Cagliari | 2986 |
| Calabria | 123 |
| Capitanata | 2985 |
| Como | 4740 |
| Corsica | 1247 |
| Cosenza | 2984 |
| Cremona | 1862 |
| Cuneo | 1875 |
| Ferrara | 113 |
| Firenze | 116 |
| Friuli | 111 |
| Genoa | 101 |
| Girgenti | 4737 |
| Lucania | 1934 |
| Lucca | 2980 |
| Malta | 126 |
| Mantua | 109 |
| Messina | 124 |
| Milan | 104 |
| Modena | 106 |
| Molise | 4733 |
| Montferrat | 2981 |
| Napoli | 121 |
| Nice | 102 |
| Novara | 2979 |
| Padova | 4729 |
| Palermo | 125 |
| Parma | 105 |
| Pavia | 4728 |
| Perugia | 2976 |
| Pisa | 115 |
| Ravenna | 114 |
| Roma | 118 |
| Salento | 122 |
| Salerno | 2983 |
| Saluzzo | 4727 |
| Sassari | 127 |
| Siena | 117 |
| Spoleto | 4731 |
| Syracuse | 2982 |
| Terracina | 4732 |
| Trapani | 4736 |
| Treviso | 1774 |
| Turin | 103 |
| Urbino | 2977 |
| Venezia | 112 |
| Verona | 108 |