The Singles Map

There are various interactive maps that compile tax data to determine where single men are compared to single women for a given age bracket.

• In general, there are more men on the west coast and more women on the east coast.  Places like Seattle, San Francisco, Los Angeles, and San Diego have considerably more single men than single women.
• Many westward states that are tech hubs draw transplants.  Since few women pursue Science Technology Engineering Math (STEM) careers, there are simply not as many women as men moving west for work.  Also, some places are not only tech hubs but also have military bases.  Military bases are known to be predominantly male dominated.

"A singles map of the United States of America" by Richard Florida