HUBZone Improvement Act of 2010 - Directs the Administrator of the Small Business Administration (SBA) to ensure that the map used by the SBA to identify HUBZones (historically underutilized business zones) is accurate, up-to-date, and revised as new data is made available.
Requires the Administrator to: (1) implement policies for ensuring that only qualified HUBZone small businesses are participating in the HUBZone program; (2) report to the congressional small businesses concerning qualification for, and recertification of, a HUBZone small business; and (3) develop measures and implement plans to assess HUBZone program effectiveness.
Amends the Small Business Act to prohibit the Administrator, during the period beginning on the date that a small business is determined qualified as a HUBZone small business and ending the day before a HUBZone program contract for which such small business submits a bid is awarded, from determining that the small business is no longer qualified based on a failure to meet the applicable employment percentage unless, among other things, the small business has not attempted to maintain such percentage.