| NAME | TEL CODE | TELEPHONE | ADDRESS | POSTAL CODE | CITY |
| Agricultural Bank of Ermoupoli | 0281 | 22565 | Akti Petrou Ralli | 841 00 | ERMOUPOLI |
| National Bank of Ermoupoli | 0281 | 22451 | 5, Kalomenopoulou str. | 841 00 | ERMOUPOLI |
| National Bank of Neorio | 0281 | 23321 | 841 00 | ERMOUPOLI | |
| Postal Bank of Ermoupoli | 0281 | 28667 | 18, Sperhiou str. | 841 00 | ERMOUPOLI |
| NAME | TEL CODE | TELEPHONE | CITY |
| Custom Office of Siros | 0281 | 22680 | ERMOUPOLI |
| NAME | TEL CODE | TELEPHONE | ADDRESS | POSTAL CODE | CITY |
| Danish Consulate of Siros | 0281 | 23714 | 1, Venizelou str. | 841 00 | ERMOUPOLI |
| Holland Consulate of Siros | 0281 | 22720 | 3, Vokotopoulou str. | 841 00 | ERMOUPOLI |
| NAME | TEL CODE | TELEPHONE | ADDRESS | POSTAL CODE | CITY |
| Radio Station "Aegean 96,0" | 0281 | 87178 | 1, Don I.Stefanou str. | 841 00 | ANO SIROS |
| Daily Newspaper "Kikladiki Foni" | 0281 | 22520 | 841 00 | ERMOUPOLI | |
| Daily Newspaper "Kini Gnomi" | 0281 | 86900 | 2, Vokotopoulou str. | 841 00 | ERMOUPOLI |
| Daily Newspaper "Laikos Agonas" | 0281 | 23800, 22416 | 841 00 | ERMOUPOLI | |
| Daily Newspaper "Sfragida" | 0281 | 23735 | Possidonia | 841 00 | ERMOUPOLI |
| Daily Newspaper "Vartsimanis" | 0281 | 25460 | 25, Stef. Proiou str. | 841 00 | ERMOUPOLI |
| Magazine "Mahitis" | 0281 | 86289 | 6, Mavromoustaki str. | 841 00 | ERMOUPOLI |
| Magazine "Paremvassi" | 0281 | 22407 | Miaouli Sq. | 841 00 | ERMOUPOLI |
| Radio Station "Kanali Ermoupolis 107,0" | 0281 | 27323 | 3, Kotsovili str. | 841 00 | ERMOUPOLI |
| Radio Station "Kosmos" | 0281 | 87400 | 841 00 | ERMOUPOLI | |
| Radio Station "SEVEN EIGHT" | 0281 | 86057 | 13, Thessaloniki str. | 841 00 | ERMOUPOLI |
| Radio Station "Siros FM 100,3" | 0281 | 85698 | Ano Taxiarhon str. | 841 00 | ERMOUPOLI |
| NAME | TEL CODE | TELEPHONE | CITY |
| Port Office of Ermoupoli | 0281 | 22633, 22690 | ERMOUPOLI |
| NAME | TEL CODE | TELEPHONE | ADDRESS | POSTAL CODE | CITY |
| G.N.T.O (E.O.T) Information Office of Siros | 0281 | 26725 | 841 00 | ERMOUPOLI | |
| G.N.T.O (E.O.T) Office of Siros | 0281 | 22375 | Andrea Miaouli Sq. | 841 00 | ERMOUPOLI |
http://www.areianet.gr/infoxenios/
