Unity Trust Bank increased the size of its loan book by 68 per cent to £197m in 2009, the latest figures from the social lender show.
It also announced a pre-tax profit of £6.5m and said it had increased its deposits by 8 per cent to £551m.
The bank said its success, during a year when most other UK banks performed badly, came from its socially focused business model.
Kevin Turmore, managing director of Unity, said: "These results have not happened by accident. In line with our shareholders' vision, we have stuck to what we do best, by providing banking services based on values, quality service and meeting our customers' needs."