1. VA government or you can register your state government programs.

https://www.sbsd.virginia.gov/certification-division/swam/

 

 

2. SBA (more difficult rules)

http://www.sba.gov/content/women-owned-small-business-federal-contract-program

 

3. you can register with some private organisations which charge yearly fees and generally recognized by many vendors.

Example:

https://wbenc.wbenclink.org