| Country | Diplomatic representation in the US |
| Portugal | chief of mission: Ambassador Joao DE VALLERA chancery: 2012 Massachusetts Avenue NW, Washington, DC 20036 telephone: [1] (202) 350-5400 FAX: [1] (202) 462-3726 consulate(s) general: Boston, New York, Newark (New Jersey), San Francisco consulate(s): New Bedford (Massachusetts), Providence (Rhode Island) |
| Puerto Rico | none (territory of the US with commonwealth status) |
| Qatar | chief of mission: Ambassador Ali Fahad al-Shahwany al-HAJRI chancery: 2555 M Street NW, Washington, DC 20037 telephone: [1] (202) 274-1600 and 274-1603 FAX: [1] (202) 237-0061 consulate(s) general: Houston |
| Romania | chief of mission: Ambassador Adrian Cosmin VIERITA chancery: 1607 23rd Street NW, Washington, DC 20008 telephone: [1] (202) 332-4846, 4848, 4851, 4852 FAX: [1] (202) 232-4748 consulate(s) general: Chicago, Los Angeles, New York |
| Russia | chief of mission: Ambassador Yuriy Viktorovich USHAKOV chancery: 2650 Wisconsin Avenue NW, Washington, DC 20007 telephone: [1] (202) 298-5700, 5701, 5704, 5708 FAX: [1] (202) 298-5735 consulate(s) general: Houston, New York, San Francisco, Seattle |
| Rwanda | chief of mission: Ambassador James KOMONYO chancery: 1714 New Hampshire Avenue NW, Washington, DC 20009 telephone: [1] (202) 232-2882 FAX: [1] (202) 232-4544 |
| Saint Barthelemy | none (overseas collectivity of France) |
| Saint Helena | none (overseas territory of the UK) |
| Saint Kitts and Nevis | chief of mission: Ambassador Dr. Izben Cordinal WILLIAMS chancery: 3216 New Mexico Avenue NW, Washington, DC 20016 telephone: [1] (202) 686-2636 FAX: [1] (202) 686-5740 consulate(s) general: New York |
| Saint Lucia |  chief of mission: vacant; note - Clenie GREER-LACASCADE (Charge d'Affaires) chancery: 3216 New Mexico Avenue NW, Washington, DC 20016 telephone: [1] (202) 364-6792 through 6795 FAX: [1] (202) 364-6723 consulate(s) general: Miami, New York |
| Saint Martin | none (overseas collectivity of France) |
| Saint Pierre and Miquelon | none (territorial overseas collectivity of France) |
| Saint Vincent and the Grenadines |  chief of mission: Ambassador La Celia A. PRINCE chancery: 3216 New Mexico Avenue NW, Washington, DC 20016 telephone: [1] (202) 364-6730 FAX: [1] (202) 364-6736 consulate(s) general: New York |
| Samoa | chief of mission: Ambassador Aliioaiga Feturi ELISAIA chancery: 800 Second Avenue, Suite 400D, New York, NY 10017 telephone: [1] (212) 599-6196, 6197 FAX: [1] (212) 599-0797 |
| San Marino | San Marino does not have an embassy in the US honorary consulate(s) general: New York, Washington, DC honorary consulate(s): Detroit, Honolulu |
| Sao Tome and Principe | chief of mission: First Secretary Domingos Augusto FERREIRA chancery: 400 Park Avenue, 7th Floor, New York, NY 10022 telephone: [1] (212) 317-0580 FAX: [1] (212) 935-7348 consulate(s): Atlanta |
| Saudi Arabia | chief of mission: Ambassador Adil al-Ahmad al-JUBAYR chancery: 601 New Hampshire Avenue NW, Washington, DC 20037 telephone: [1] (202) 342-3800 FAX: [1] (202) 944-3113 consulate(s) general: Houston, Los Angeles, New York |
| Senegal | chief of mission: Ambassador Amadou Lamine BA chancery: 2112 Wyoming Avenue NW, Washington, DC 20008 telephone: [1] (202) 234-0540 FAX: [1] (202) 332-6315 consulate(s) general: Houston, New York |
| Serbia | chief of mission: Ambassador Ivan VUJACIC chancery: 2134 Kalorama Road NW, Washington, DC 20008 telephone: [1] (202) 332-0333 FAX: [1] (202) 332-3933 consulate(s) general: Chicago, New York |
| Seychelles | chief of mission: Ambassador Jean Ronald JUMEAU chancery: 800 Second Avenue, Suite 400C, New York, NY 10017 telephone: [1] (212) 972-1785 FAX: [1] (212) 972-1786 |
| Sierra Leone | chief of mission: Ambassador Bockari Kortu STEVENS chancery: 1701 19th Street NW, Washington, DC 20009 telephone: [1] (202) 939-9261 through 9263 FAX: [1] (202) 483-1793 |
| Singapore | chief of mission: Ambassador CHAN Heng Chee chancery: 3501 International Place NW, Washington, DC 20008 telephone: [1] (202) 537-3100 FAX: [1] (202) 537-0876 consulate(s) general: San Francisco consulate(s): New York |
| Slovakia | chief of mission: Ambassador Rastislav KACER chancery: 3523 International Court NW, Washington, DC 20008 telephone: [1] (202) 237-1054 FAX: [1] (202) 237-6438 consulate(s) general: Los Angeles, New York |