Yes, the Consulate of Singapore requires you to make your application in the jurisdiction where you live, as follows:
Singapore consulate in San Francisco (Area Served) Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington and Wyoming.
Singapore consulate in New York (Area Served) Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, and Wisconsin
Honory Consulate General in Miami - Florida
The Singapore Embassy in Washington DC All other states