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NEWS RELEASE

IAMGOLD'S THREE OWNED MINES EARN AWARDS FOR SUSTAINABLE MINING

Toronto, Ontario, December 16, 2015 - IAMGOLD Corporation ("IAMGOLD" or the "Company") today announced that its Rosebel Gold Mine in Suriname, Essakane Mine in Burkina Faso and Westwood Mine in Canada have each been awarded prestigious Towards Sustainable Mining ("TSM") Leadership Awards for 2015 by the Mining Association of Canada. For the first time, mines outside Canada have been eligible for the TSM Leadership Award. Essakane and Rosebel were respectively the only winners in Africa and South America.

"IAMGOLD's commitment to corporate responsibility flows from our Zero Harm philosophy," commented Benjamin Little, SVP, Corporate Affairs, Health, Safety & Sustainability & People. "The inclusion of our three mines among the eight mines honoured this year is the result of the tireless efforts and commitment of our employees. We are proud to receive these awards and will continue to seek further innovative ways of excelling in health and safety performance, respect for the environment and relations with our community partners."

TSM's requirements go well beyond regulatory obligations and are designed to improve industry's operational performance in key environmental and social areas of mining. The TSM Leadership Award is granted only when a mining operation meets or exceeds a Level A ranking in their results across all of the six protocols of TSM: health and safety, Aboriginal and community outreach, crisis management, tailings management, biodiversity conservation management, and energy use and greenhouse gas emissions management. An operation's TSM results are externally verified to be eligible for the award.

About IAMGOLD

IAMGOLD (www.iamgold.com) is a mid-tier mining company with four operating gold mines on three continents. A solid base of strategic assets in North and South America and West Africa is complemented by development and exploration projects and continued assessment of accretive acquisition opportunities. IAMGOLD is in a strong financial position with extensive management and operational expertise.

For further information please contact:

Bob Tait, VP Investor Relations, IAMGOLD Corporation Tel: (416) 360-4743 Mobile: (647) 403-5520

Laura Young, Director Investor Relations, IAMGOLD Corporation Tel: (416) 933-4952 Mobile: (416) 670-3815

Toll-free: 1-888-464-9999 [email protected]

Please note:

This entire news release may be accessed via fax, e-mail, IAMGOLD's website at www.iamgold.com and through CNW Group's website at www.newswire.ca. All material information on IAMGOLD can be found at www.sedar.com or at www.sec.gov.

Si vous désirez obtenir la version française de ce communiqué, veuillez consulter le http://www.iamgold.com/French/accueil/default.aspx.