Marlborough-based St. Mary’s Credit Union posted net income of $2.3 million for 2009, a 74 percent increase over the $1.3 million it reported the previous year.
The credit union’s assets grew by 10.5 percent to $562 million and new loans increased 62 percent to $152.3 million.
St. Mary’s has more than 40,000 members and branches in Marlborough, Northborough and Hudson.