NASDAQ: BOKF                                          EXHIBIT 99 (a)



For Further Information Contact:          Stacy Kymes
                                          Investor Relations
                                          BOK Financial Corp.
                                          (918) 588-6542

                                          Danny Boyd
                                          Corporate Communications
                                          BOK Financial Corp.
                                          (918) 588-6348

              BOK Financial Income Up 11 Percent in Second Quarter
      Annualized Loan Growth Jumps to 21 Percent, First Cash Dividend Paid

     TULSA,  Okla.  (Tuesday,  July 19,  2005) --  Accelerated  loan  growth and
continued increases in non-interest revenue combined to generate earnings growth
of 11 percent at BOK Financial Corp. for the second quarter of 2005.

     BOK Financial reported net income of $50.5 million, or 75 cents per diluted
share,  for the second quarter of 2005 compared with $45.5 million,  or 68 cents
per diluted  share,  for the second  quarter of 2004.  During the  quarter,  the
company  paid its  first  quarterly  cash  dividend  on common  shares,  of $6.6
million, or 10 cents per share.

     The company's performance featured a $429 million increase in loan balances
since March 31, 2005.  Outstanding  loans totaled $8.5 billion at June 30, 2005.
Commercial loans increased $223 million, led by a $104 million increase in loans
to the energy sector of the  portfolio.  Commercial  real estate loans grew $193
million,  including  $65  million in  Oklahoma  and $32  million  in Texas.  The
acquisition  of Valley  Commerce  Bank in Phoenix,  which was  completed  in the
second quarter of 2005, added $70 million of commercial real estate loans.

     "Each of our major markets  contributed to loan growth," said President and
CEO Stan Lybarger.  "We are especially pleased to report a 14 percent annualized
growth rate in Oklahoma,  our most mature  market,  and a 22 percent  annualized
growth rate in Texas. Our efforts in Phoenix are off to a very good start with a
68  percent  annualized  growth  rate for the first  quarter  of  operations  in
addition to the Valley Commerce acquisition."

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Page 2: BOK Financial Earnings

     Net interest revenue increased $7.3 million,  or 7 percent,  due to an $886
million  increase  in average  earning  assets.  Average  loans  increased  $793
million, or 11 percent,  and average securities  increased $179 million compared
with the second quarter of 2004. The growth in average earning assets was funded
primarily by a $389 million  increase in deposits and a $594 million increase in
short-term borrowings.

     Net interest margin was 3.45 percent compared with 3.46 percent in both the
second  quarter of 2004 and the first quarter of 2005.  Net interest  margin for
the first quarter of 2005  included a 4 basis point benefit from the  collection
of foregone  interest on a non-performing  loan and fees related to a large loan
transaction.  This stability in the net interest  margin was achieved  despite a
highly  competitive rate environment and a flattening yield curve. The company's
overall interest rate risk management objective is to position the balance sheet
to be essentially neutral to changes in interest rates. Additionally, net losses
of $1.5 million were  recognized  during the second  quarter on  securities  and
derivatives as part of the interest rate risk management program.

     Fee and commission revenue rose $6.7 million,  or 8 percent,  compared with
the second quarter of 2004. Trust revenue  increased $2.3 million or 17 percent.
Trust assets totaled $26.0 billion compared with $22.9 billion at June 30, 2004.
Service  charges on deposit  accounts  grew $1.4  million,  or 6 percent,  while
transaction  card revenue  increased $1.2 million,  or 7 percent.  Other revenue
increased  $1.7  million due  primarily to fees earned on margin funds placed as
part of the company's derivatives programs.

     The company  recorded a $2.0 million  provision  for loan losses during the
second  quarter of 2005 compared with  provisions of $4.0 million for the second
quarter of 2004 and $2.0 million for the first quarter of 2005. Net  charge-offs
totaled $2.3 million compared to $4.9 million for the same period last year.

     "Credit quality continues to be exceptionally strong, which is reflected in
our loan loss provision,"  said Lybarger.  "Although credit quality is difficult
to  predict,  we do not see any  change  in this  general  trend  over  the next
quarter."

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Page 3: BOK Financial Earnings

     Reserves for credit losses, which include the allowance for loan losses and
a reserve for credit risk on unfunded  loans,  were 1.50 percent of  outstanding
loans and 313 percent of  non-performing  loans at June 30, 2005.  That compared
with combined  reserves for credit losses of 1.57 percent of  outstanding  loans
and 253 percent of  non-performing  loans at March 31, 2005.  The  allowance for
loan losses was $109  million at June 30, 2005,  or 1.29 percent of  outstanding
loans, and 269 percent of  non-performing  loans at June 30, 2005. The allowance
for loan  losses  was 1.35  percent  of  outstanding  loans and 219  percent  of
non-performing loans at March 31, 2005. Non-performing loans totaled $41 million
at June 30, 2005, down $9.3 million since March 31, 2005.

     The company  realized  gains of $5.9 million on sales of assets  during the
second  quarter of 2005.  These gains included $4.7 million from the sale of its
interest in an Oklahoma City office  building.  This gain,  net of income taxes,
contributed 4 cents to the second quarter's earnings per share. Additionally,  a
net gain of $1.2  million was  recognized  on the sale of $118  million of loans
from the residential mortgage loan portfolio.

     A provision for impairment of mortgage servicing rights of $7.1 million was
recorded  during the quarter as mortgage  commitment  rates  decreased  50 basis
points.  This  provision  was  partially  offset  by $3.4  million  in  gains on
securities and derivatives  the company holds as an economic hedge.  The net MSR
provision of $3.7 million  recognized  in the second  quarter of 2005  generally
offsets a net recovery of MSR provision of $3.5 million  recognized in the first
quarter of 2005. A net recovery of MSR provision of $752,000 was recorded during
the second quarter of 2004.

     Operating expenses,  excluding the provision for MSRs, increased 8 percent,
or $9.1  million,  compared  with last  year.  Personnel  costs  increased  $5.5
million, or 9 percent.  Regular  compensation expense increased $4.7 million due
to a 7 percent  increase in average  compensation  per  employee and a 5 percent
increase in staffing levels.

     Also during the second quarter,  the company issued $150 million of 10-year
subordinated  debt  through  its  lead  banking  subsidiary  and  completed  the
acquisition of Valley Commerce Bank.  Proceeds of the subordinated debt provided
additional  capital  to  support  future  growth of the  company  and  permitted
repayment of short-term borrowing. Valley Commerce Bank was acquired on April 6,
2005, for $32 million in cash. The Valley Commerce acquisition added $93 million
in loans and $110 million in deposits.

                                     -more-

Page 4: BOK Financial Earnings

     BOK  Financial  is a regional  financial  services  company  that  provides
commercial  and  consumer  banking,  investment  and  trust  services,  mortgage
origination and servicing,  and an electronic funds transfer  network.  Holdings
include Bank of  Albuquerque,  N.A.,  Bank of Arkansas,  N.A., Bank of Oklahoma,
N.A., Bank of Texas, N.A.,  Colorado State Bank and Trust, N.A., Valley Commerce
Bank,  N.A.,  BOSC,  Inc.,  Southwest Trust and the TransFund  electronic  funds
network. Shares of BOK Financial are traded on the NASDAQ under the symbol BOKF.
For more information, visit our website at www.bokf.com.

     This news release  contains  forward-looking  statements  that are based on
management's  beliefs,   assumptions,   current   expectations,   estimates  and
projections  about BOK Financial Corp., the financial  services industry and the
economy  generally.  Words  such  as  "anticipates,"  "believes,"  "estimates,"
"expects,"  "forecasts,"  "plans,"  "projects,"  variations  of such  words and
similar  expressions are intended to identify such  forward-looking  statements.
Management  judgments relating to, and discussion of the provision and allowance
for credit  losses  involve  judgments  as to future  events and are  inherently
forward-looking  statements.  Assessments that BOK Financial's  acquisitions and
other growth endeavors will be profitable are necessary  statements of belief as
to the outcome of future events based in part on information  provided by others
which BOK Financial has not  independently  verified.  These  statements are not
guarantees of future performance and involve certain risks,  uncertainties,  and
assumptions  which are  difficult  to predict  with  regard to  timing,  extent,
likelihood and degree of occurrence.  Therefore, actual results and outcomes may
materially  differ  from  what  is  expected,  implied  or  forecasted  in  such
forward-looking statements.  Internal and external factors that might cause such
a difference  include,  but are not limited to (1) the ability to fully  realize
expected  cost  savings from mergers  within the expected  time frames,  (2) the
ability of other  companies on which BOK  Financial  relies to provide goods and
services in a timely and  accurate  manner,  (3)  changes in interest  rates and
interest  rate  relationships,  (4) demand for  products and  services,  (5) the
degree of  competition  by  traditional  and  non-traditional  competitors,  (6)
changes in banking regulations,  tax laws, prices, levies, and assessments,  (7)
the impact of  technological  advances,  and (8) trends in customer  behavior as
well as their ability to repay loans.  BOK Financial  Corp.  and its  affiliates
undertake no obligation to update, amend, or clarity forward-looking statements,
whether as a result of new information, future events or otherwise.