EXHIBIT 21.0

SUBSIDIARIES OF THE COMPANY

The following are the Company's subsidiaries as of the close of the fiscal year
ended June 30, 2008. All beneficial interests are wholly-owned, directly or
indirectly, by the Company, except for Napco Gulf security Group of which the
Company owns 51%,and are included in the Company's consolidated financial
statements.

Name                                       State or Jurisdiction of Organization
- ----                                       -------------------------------------

Alarm Lock Systems, Inc.                         Delaware

Continental Instruments, LLC                     New York

Napco Security Systems International, Inc.       New York

Napco/Alarm Lock Exportadora, S.A.               Dominican Republic

Napco/Alarm Lock Grupo Internacional, S.A.       Dominican Republic
(formerly known as NSS Caribe, S.A.)

Napco Group Europe, Limited                      England

Napco Gulf Security Group, LLC                   New York

Napco Americas                                   Cayman Islands