SNL Financial ranked three Massachusetts community banks among its list of 2013’s 100 best-performing community banks with assets between $500 million and $5 billion. 

Northern Bancorp in Woburn clocked in at the No. 6 spot, with around $1.1 billion in assets, a 4.5 percent interest margin, a 15.98 percent loan growth rate and net charge offs totaling around 0.03 percent of total loans.

Leader Bank in Arlington ranked in at No. 99 on SNL’s list, with $658 million in assets, 22.8 percent loan growth, a 3.2 percent interest margin and net charge offs making up 0.04 percent of total loans.

Cambridge Bancorp ranked 100 on the list. Last year, it had $1.5 billion in assets, 26.7 percent loan growth and 3.39 percent interest margin.

For banks between $500 million and $5 billion, SNL ranked companies at the bank holding company level if consolidated data was reported. Otherwise, it used the commercial bank subsidiary. Thrifts were excluded. Based on those criteria, SNL said in a statement, 784 companies were eligible for the top 100 ranking of banks between $500 million and $5 billion in assets, and 4,057 were eligible for the category of banks below $500 million. The second list did not include any Massachusetts banks.