Ronald Umphress offers a simple reason why his bank is so profitable  year after year. 
"We don't charge country club memberships to the bank," said Mr.  Umphress, president and chief executive of Citizens State Bank, Princeton,   Tex. In fact, he said, executives get "no perks at all."   
  
Keeping costs low and maintaining an active bond trading business helped  the tiny Texas bank make the 1996 list of the 100 most profitable community   banks in the country. It earned a whopping 3.25% return on assets.   
Though analysts and consultants often tout the success of large  superregional banks, the list compiled by American Banker using Sheshunoff   Information Services data found high achievers among the smallest and most   obscure community banks-those with less than $50 million of assets-and   those of $50 million to $1 billion. (Complete tables begin on page 8.)       
  
"Small banks are doing so well sometimes you worry for them," said  Arnold Danielson, chairman of Danielson Associates Inc., a Rockville, Md.,   consulting firm. "They may think it's the future forever."   
How did last year's strongest performers do it? The stories range from  cost cutting to buying risky loans to maintaining close relations with   local customers.   
For example, among the stars in the $50 million-$1 billion range was  $165 million-asset Yellowstone Bank of Laurel, Mont. Vice president James   K. Harris credits the bank's decision to move into the faster-growing   Billings market.     
  
Among even smaller banks the standouts include First State Bank of  Keene, Tex. President Peter G. Bennis attributes its startling return on   equity-more than 30% a year for three years running-to buying more than $30   million in loans from the Federal Deposit Insurance Corp. since 1991.     
Buying the loans, which came from failed Texas banks, "was very nerve-  racking," Mr. Bennis said, "but we realized it was something we needed to   be doing."   
Some bankers cited special circumstances for their exceptional returns.  Reading (Kan.) State Bank, with $4 million of assets, said its ROA was   inflated by a profit on stock it owned and by the sale of some assets.   Reading returned 4.77% on assets last year, compared with 0.40% in 1995.   The bank is now looking for a buyer.