Third Quarter 2010

Exhibit 99.1

Todd Brice

President and

Chief Executive Officer

Mark Kochvar

Sr. EVP and

Chief Financial Officer

3

Forward-Looking Statement

and Risk Factors

•

This presentation contains certain forward-looking statements within the meaning of Section 27A

of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.  Forward-

looking statements include, among others, statements regarding trends, strategies, plans, beliefs,

intentions, expectations, goals and opportunities.  Forward-looking statements are typically

identified by words or phrases such as believe, expect, anticipate, intend, estimate, assume,

strategy, plan, outlook, outcome, continue, remain, trend and variations of such words and similar

expressions,

or

future

or

conditional

verbs

such

as

will,

would,

should,

could,

may

or similar

expressions.  Actual results and performance could differ materially from those anticipated by

these forward-looking statements.  Factors that could cause such a difference include, but are not

limited to, general economic conditions, changes in interest rates, deposit flows, loan demand,

asset quality, including real estate and other collateral values, and competition.

•

S&T cautions that these forward-looking statements are subject to numerous assumptions, risks

and uncertainties, which change over time.  These forward-looking statements speak only as of

the date hereof, and S&T assumes no duty to update forward-looking statements.  Subsequent

written

or

oral

statements

attributable

to

S&T

or

persons

acting

on

its

behalf

are

expressly

qualified in their entirety by the cautionary statements contained herein and those in S&T’s reports

previously and subsequently filed with the Securities and Exchange Commission.

S&T Bancorp Corporate Profile

4

Investor Highlights

•

Historically High Performing Bank

•

Experienced Management Team

•

Relationship Banking Model

•

Well-Positioned for Growth

5

6

Select PA Bank Holding Companies

6.35

0.86

4.1

S&T Bancorp

0.12

0.01

6.1

FCF

6.48

0.77

8.8

FNB

(0.68)

(0.08)

9.2

National Penn

0.19

0.03

13.9

Susquehanna

4.81%

0.59%

$16.6

Fulton

ROE

*

ROA

*

Assets

Data

Source:

SNL

YTD

June

30,

2010

/

*

Annualized

using

net income available to common shareholders

Dollars in billions

7

Stock Performance

18.71

5.55

8.80

6.46

8.45

$ 9.34

Price

1.83

1.13

S&T Bancorp

98

73

FCF

204

95

FNB

130

88

National Penn

117

55

Susquehanna

140%

99%

Fulton

P/TBV

P/BV

Data Source: Highline Financial 10/22/10

Marcellus Shale Distribution

8

Marcellus Shale Impact

•

Fully developed, the Marcellus Shale has the potential to

be the second largest natural gas field in the world.

•

The natural gas found in the Marcellus could be equivalent

to the energy content of 87 billion barrels of oil, enough to

meet the demand of the entire world for nearly three years.

•

Potential to create thousands of jobs and billions in annual

revenue for the state.

9

Source: www.iogapa.org

10

Quarterly Summary

5.60%

0.76%

$0.28

$7.9

Second

Quarter

2010

7.61%

1.06%

$0.39

$10.9

Third

Quarter

2010

2009

Third

Quarter

Net Income

$7.7

Diluted Common Earnings per Share

$0.28

Common Return on Average Assets

*

0.73%

Common Return on Average Equity

*

5.67%

Dollars in millions

*

Annualized

11

Income Statement

Dollars in millions

$0.39

$10.9

(1.6)

(4.7)

17.2

(8.3)

-

(24.9)

50.4

12.3

$38.1

Third

Quarter

2010

2010

2009

Second

Quarter

Third

Quarter

Net Interest Income –

FTE

$37.8

$38.1

Noninterest Income

11.4

10.3

Total Revenue

49.2

48.4

Noninterest Expense

(25.7)

(24.8)

Security Gains (Losses)

0.1

(2.1)

Provision for Loan Losses

(9.1)

(8.4)

Net Income Before Taxes

14.5

13.1

Taxes

(5.1)

(3.9)

Preferred Stock Dividends

(1.5)

(1.5)

Net Income Available to Common 

Shareholders

$7.9

$7.7

Diluted Common Earnings per Share

$0.28

$0.28

12

Net Interest Margin

4.09

1.21

2.90

1.08

4.99

5.10

3.82%

Third

Quarter

2010

2010

2009

Second

Quarter

Third

Quarter

Securities -

FTE

3.89%

4.11%

Loans -

FTE

5.12

5.25

Total Earning Assets

5.01

5.13

Deposits

1.15

1.37

Borrowings

2.79

2.71

Total Costing Liabilities

1.28

1.54

Net Interest Margin -

FTE

4.05

3.94

13

Noninterest Income

Dollars in millions

$12.3

0.1

1.6

0.6

2.1

1.9

$ 6.0

Third

Quarter

2010

2010

2009

Second

Quarter

Third

Quarter

Community Banking

$  6.6

$  5.7

Wealth Management

1.9

1.9

Insurance

2.0

2.0

Letters of Credit / Loan

0.8

0.8

Mortgage Banking

0.2

-

Other

(0.1)

(0.1)

Total

$11.4

$10.3

14

Balance Sheet

Dollars in millions

$4,098

575

49

169

$3,305

$4,098

482

3,315

$301

Sept. 30,

2010

June 30,

2010

Sept. 30,

2009

Securities

$340

$390

Loans, Net

3,343

3,385

Other

456

433

Total Assets

$4,139

$4,208

Deposits

$3,297

$3,280

Borrowings

227

331

Other

49

55

Equity

566

542

Total Liabilities & Equity

$4,139

$4,208

15

Loan Portfolio

Dollars in millions

$3,371

$2,471

306

728

$1,437

$900

7

76

366

$451

Sept. 30,

2010

June 30,

2010

Sept. 30,

2009

Consumer

Home Equity    

$451

$459

Residential Mortgage

364

368

Consumer Installment

77

81

Construction

10

12

Total Consumer

$902

$920

Commercial

Commercial Real Estate

$1,424

$1,425

Commercial & Industrial

734

748

Construction

337

353

Total Commercial

$2,495

$2,526

Total Loans

$3,397

$3,446

16

Asset Quality

*

YTD September 30, 2010 Annualized

75

1.67

0.99

2.45

2.23%

2010

Sept. 30,

1.25

1.23

1.20

1.75

Loan Loss Reserve / Total Loans

December 31,

101

0.31

1.21

1.19%

2008

66

1.60

2.80

2.67%

2009

2007

2006

Nonperforming Loans / Total Loans

0.60%

0.74%

Nonperforming Assets / Total Loans Plus

OREO

0.62

0.76

Net

Charge-offs

/

Average

Loans

*

0.17

0.49

Loan Loss Reserve / Nonperforming Loans

204

167

Nonperforming Loans

90

2.75

$  67.9

Total Commercial

10

2.48

7.6

Construction

11

1.16

8.5

Commercial & Industrial  

69

3.60

$  51.8

Commercial Real Estate

Commercial

10

0.83

$    7.4

Total Consumer

1

7.63

0.5

Construction

-

0.12

0.1

Consumer Installment

7

1.41

5.1

Residential Mortgage

2

0.38

$    1.7

Home Equity

% of

Total NPL

Consumer

% NPL

Sept. 30,

2010

Total Nonperforming Loans

100

2.23

$  75.3

Nonperforming

Loans

(NPL)

are

loans

where

collection

of

interest

or

principal

is

doubtful,

or

generally

when

interest

or

principal

payments are 90 days or more past due.

Dollars in millions

Specific reserves $10.5

USDA Guarantee $6.8

17

Construction & CRE by Type

(4)

97

5

93

RE Develop –

Residential

(14)

242

13

228

Offices

100

16 

5

6

6

8

11

13

17

$1,743

273

92

112

103

129

196

218

$   299

($ 35)

$1,778

Total

(11)

284

Miscellaneous

(4)

96

Healthcare/Education

102

Flex/Mixed Use

(1)

104

RE Develop –

CL

3

126

Manuf/Industrial/Warehouse

43

153

Hotels

(44)

262

Residential Rental Properties

($13)

$   312

Retail/Strip Malls

Change

Type 

18

Dollars in millions

Sept. 30,

2010

% of Total

Sept. 30,

2009

10

Construction & CRE –

NPL by Type

8

5.35

5.0

RE Develop –

Residential

5

1.33

3.0

Offices

7

1.29

$  3.9

Retail/Strip Malls

100

3.41

$59.4

Total

26

5.64

15.4

Miscellaneous

7

4.31

4.0

Healthcare/Education

5

2.84

3.1

Flex/Mixed Use

15

8.90

9.1

RE Develop –

CL

1

0.43

0.6

Manuf/Industrial/Warehouse

4

1.31

2.6

Hotels

22

5.79

12.7

Residential Rental Properties

% of

Total NPL

Type

% NPL

Sept. 30,

2010

19

Dollars in millions

Construction & CRE by Location

1

30

2

31

Southwest Region

10

12

1

22

West Virginia

-

13

1

13

Western Region

-

12

1

12

Mid-Atlantic Region

100

1 

1

3

1

4

6

79

$1,743

11

24

55

20

70

102

$1,383

($35)

$1,778

Total

-

11

New England

-

24

Midwest Region

6

49

Southeast Region

7

13

Tennessee

(4)

74

Ohio

90

New York

($67)

$1,450

Pennsylvania

Change

Location

20

Dollars in millions

Sept. 30,

2009

% of

Total

Sept. 30,

2010

12

Construction & CRE –

NPL by Location

2

4.60

1.4

Southwest Region

-

-

-

West Virginia

78

3.31

$45.7

Pennsylvania

13

71.87

8.0

New England

100

3.41

$59.4

Total

-

-

-

Mid-Atlantic Region

-

-

-

Western Region

-

-

-

Midwest Region

4.48

2.5

Southeast Region

-

-

-

Tennessee

-

-

-

Ohio

3

1.77

1.8

New York

% of

Total NPL

Location

% NPL

Sept. 30,

2010

21

Dollars in millions

4

22

Securities

$301

23

11

73

49

45

$100

Third

Quarter

2010

13

11

Equities

2010

2009

Second

Quarter

Third

Quarter

Agencies

$124

$123

Agency CMO

50

65

Agency MBS

54

67

Municipals

78

99

FHLB Stock

23

23

Total  

$340

$390

All securities are classified as available-for sale

Dollars in millions

23

Deposits

Dollars in millions

921

845

823

Certificates of Deposit < $100K

732

743

746

Savings

2010

2010

2009

Third

Quarter

Second

Quarter

Third

Quarter

Noninterest-bearing Demand

$ 744

$ 733

$ 674

Interest-bearing Demand

277

260

241

Money Market

247

251

239

Certificates Of Deposit > $100K

468

465

473

Total  

$3,305

$3,297

$3,280

24

Borrowings

Dollars in millions

70

70

70

Subordinated Debt

2010

2010

2009

Third

Quarter

Second

Quarter

Third

Quarter

Repos and FFP

$   48

$   44

$  61

Short-term Borrowings

-

52

83

Long-term Borrowings

30

40

96

Trust Preferred

21

21

21

Total  

$169

$227

$331

25

Capital

Sept. 30

2010

June 30

2010

Sept. 30

2009

Well-

Capitalized

Leverage

*

10.92%

10.64%

9.92%

5.00%

Tier 1 –

Risk-Based Capital

*

12.97

12.52

11.57

6.00

Total –

Risk-Based Capital

*

16.35

15.87

14.86

10.00

Tangible Common Equity /

Tangible Assets

7.53

7.23

6.48

NA

*

Includes CPP of $108.7 million

26

S&T Strategy Map

27

One Customer at a Time

Culture of

Collaboration

Integration

Based on

Customer Needs

Market

Composition

Develop & Align

Infrastructure

Shareholder

Value

High Performance