Haresnape, who was first appointed as deputy chair of IMLA in 2012, was appointed to the role following a vote by members of the executive committee.
He will replace David Finlay following his departure from Barclays Bank.
Haresnape said: “I am looking forward to building on David’s great contribution as IMLA Chairman and helping to move the organisation forward as we continue to grow.
“IMLA has a vital role to play in supporting lender/broker relationships and informing broader efforts to shape a balanced and sustainable mortgage market.”
He will hold the position until IMLA’s Annual General Meeting in November 2014, when the next election takes place.
Peter Williams, IMLA executive director, added: “Charles will head up a strong team of IMLA directors who are committed to work closely with our members and associates, fellow trade bodies, government and regulators to encourage the healthy growth of the mortgage and housing markets.
“Charles has already led on member and associate recruitment and has been instrumental in the growth of IMLA in recent years, and we will continue to seek new partners moving forwards.”
