| Name | Siam |
| Country Tag | SIA |
| Subcontinent | East Indies |
| Region | Indochina |
| Capital Province | Ayutthaya |
| Capital Province ID | 600 |
Here are the tags of countries that are on the same subcontinent as Siam:
| Country | Country Tag |
|---|---|
| Aceh | ATJ |
| Annam | ANN |
| Arakan | ARK |
| Ava | AVA |
| Ayutthaya | AYU |
| Bali | BLI |
| Banjar | BNJ |
| Banten | BAN |
| Barus | BRS |
| Berau | BEU |
| Blambangan | BLM |
| Bone | BNE |
| Brunei | BEI |
| Buton | BTN |
| Butuan | BTU |
| Cebu | CEB |
| Champa | CHA |
| Champasak | CHK |
| Cirebon | CRB |
| Dai Viet | DAI |
| Deli | DLI |
| Demak | DMK |
| Hsenwi | HSE |
| Hsipaw | HSI |
| Indrapura | IND |
| Jambi | JMB |
| Jarai | JAR |
| Johor | JOH |
| Kale | KAL |
| Kedah | KED |
| Kelantan | KEL |
| Khmer | KHM |
| Koho | KOH |
| Kutai | KUT |
| Lan Na | LNA |
| Lan Xang | LXA |
| Lanao | LNO |
| Lanfang | LFA |
| Ligor | LIG |
| Luang Prabang | LUA |
| Luwu | LUW |
| Madyas | MAS |
| Maguindanao | MGD |
| Majapahit | MAJ |
| Makassar | MKS |
| Malacca | MLC |
| Malaya | MSA |
| Maldives | DGL |
| Mataram | MTR |
| Maynila | MNA |
| Mong Kawng | MKA |
| Mong Nai | MNI |
| Mong Pai | MPA |
| Mong Yang | MYA |
| Muang Phuan | MPH |
| Pagarruyung | PGR |
| Pahang | PAH |
| Palembang | PLB |
| Pangasinan | PGS |
| Pasai | PSA |
| Pattani | PAT |
| Pegu | PEG |
| Perak | PRK |
| Prome | BPR |
| Rhade | RHA |
| Sambas | SMB |
| Shan | SST |
| Siak | SAK |
| Siam | SIA |
| Sukhothai | SUK |
| Sulu | SUL |
| Sunda | SUN |
| Taungu | TAU |
| Ternate | TER |
| Tidore | TID |
| Tondo | TDO |
| Tonkin | TOK |
| Vientiane | VIE |