NISA

NISA may refer to:


 * National Independent Soccer Association, a third tier United States soccer league
 * National Intelligence and Security Agency of Somalia
 * Nuclear and Industrial Safety Agency, part of the Japanese Ministry of Economy, Trade and Industry
 * NIS America, the US subsidiary of Nippon Ichi Software
 * National Ice Skating Association, former name of British Ice Skating, the governing body of ice skating sports within the UK
 * The New ISA, a revised form of the Individual Savings Account introduced in the UK's 2014 budget
 * North Imphal Sporting Association, a football club in India
 * National Industrial Security Academy, an academy in India
 * NISA Investment Advisors, an American asset management firm
 * Nippon individual savings account, a tax-advantaged investment account in Japan