A valid passport is required. U.S. citizens do not need a visa if their visit is for business or a social visit and their stay is for 90 days or less. Travelers to the region should note that Singapore and some neighboring countries, do not allow Americans to enter under any circumstances with fewer than six months of validity remaining on their passport. Female U.S. citizens who are pregnant when they apply to enter Singapore for a social visit are no longer required to make prior application through the nearest Singapore overseas mission or to provide documentation from a U.S. embassy concerning the nationality the child will acquire at birth.
Embassy
in the US :
For
additional information, contact the Embassy of Singapore,
3501 International Place, NW, Washington, DC 20008 (202-537-3100).
Singapore
Travel
Health Information :
Vaccination or Disease
Recommendations or Requirements for Vaccine-Preventable Diseases
Recommended if you are not up-to-date with routine shots such as, measles/mumps/rubella (MMR) vaccine, diphtheria/pertussis/tetanus (DPT) vaccine, etc.
Recommended for all unvaccinated people traveling to or working in countries with an intermediate or high level of hepatitis A virus infection ( see map ) where exposure might occur through food or water. Cases of travel-related hepatitis A can also occur in travelers to developing countries with "standard" tourist itineraries, accommodations, and food consumption behaviors.
Recommended for all unvaccinated persons traveling to or working in countries with intermediate to high levels of endemic HBV transmission ( see map ) and who might be exposed to blood or body fluids, have sexual contact with the local population, or be exposed through medical treatment, such as for an accident, and for all adults requesting protection from HBV infection.
Recommended for all unvaccinated people traveling to or working in Southeast Asia, especially if visiting smaller cities, villages, or rural areas and staying with friends or relatives where exposure might occur through food or water.
Recommended if you plan to visit rural farming areas and under special circumstances, such as a known outbreak of Japanese encephalitis, see country-specific information .
Recommended for adult travelers who have received a primary series with either inactivated poliovirus vaccine (IPV) or oral polio vaccine (OPV). They should receive another dose of IPV before departure.