8-K

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 8-K
Current Report
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 16, 2006
S&T Bancorp, Inc. ____________________________________________________________ (Exact Name of Registrant as Specified in its Charter)
Pennsylvania_________________ (State or Other Jurisdiction of Incorporation)	0-12508_________________ (Commission File Number)	25-1434426_________________ (IRS Employer Identification No.)

43 South Ninth Street, Indiana, PA
__________________________________________
(Address of Principal Executive Offices) 15701
___________________
Zip Code

Registrant's telephone number, including area code (800) 325-2265
___________________

Item 2.02 - Results of Operations and Financial Condition

     On January 16, 2006, S&T Bancorp, Inc. announced by press release its earnings for the quarter ended December 31, 2005. A copy of the press release is attached hereto as Exhibit 99.1. The information contained in this Report on form 8-K is furnished pursuant to Item 2.02 and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 - Financial Statements and Exhibits (c) Exhibits (99.1) Press Release
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed by the undersigned thereunto duly authorized.
January 16, 2006	S&T Bancorp, Inc. /s/ Robert E. Rout Robert E. Rout Senior Executive Vice President, Chief Financial Officer and Secretary

EX-99

Contact:   Robert E. Rout
Senior Executive Vice President,
Chief Financial Officer & Secretary
724-465-1487

TO BE RELEASED
9:00 a.m., Monday, January 16, 2006

S&T Bancorp, Inc. Announces Earnings

Indiana, Pennsylvania - S&T Bancorp, Inc. (NASDAQ: STBA) today announced earnings for the fourth quarter and the year ended December 31, 2005. Diluted earnings per share for the fourth quarter of 2005 was $0.55 per share compared to $0.54 per share in the fourth quarter of 2004. Net income for the fourth quarter of 2005 was $14.6 million compared to $14.6 million in the comparable period one year ago.

For the year ended December 31, 2005, diluted earnings per share increased 7 percent to $2.18 from $2.03 in 2004, and net income increased 7 percent to $58.2 million from $54.4 million in 2004. Return on average assets and return on average equity for 2005 were 1.90 percent and 16.57 percent, respectively, compared to 1.83 percent and 16.07 percent in 2004.

James C. Miller, chairman and chief executive officer, commented, "I am very pleased with our 2005 performance and the continued progress we are making implementing our relationship banking strategies. All areas of the bank performed well this year, but particularly notable in our performance for 2005 is the success in commercial lending, core deposit growth and fee revenues."

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S&T Bancorp
Announces Earnings
Page 2 of 5

Earning assets have increased $180.6 million over the past 12 months, primarily driven by a $174.7 million or 10 percent increase in commercial lending, and a $29.4 million or 5 percent increase in consumer and residential mortgage loans. Investment securities declined $23.6 million during the same period as an asset liability management strategy to reduce borrowing levels, balance sheet leverage and the potential interest rate risks of a flattening yield curve. Deposits increased $242.6 million or 11 percent. Miller noted, "Core deposit growth is an important success factor for S&T. We are seeing continued success in deepening customer relationships with S&T through deposit products such as our Greenplan savings account, free checking, on-line banking and corporate cash management services."

Net interest income, on a fully taxable equivalent basis, increased approximately $0.8 million or 3 percent for the quarter, and $5.2 million or 5 percent for the 12 months of 2005 as compared to the same periods of 2004. Net interest margin on a fully taxable equivalent basis was 4.03 percent, 3.97 percent and 4.05 percent for the third quarter, fourth quarter and full year of 2005. For the same periods of 2004, the net margin was 3.96 percent, 4.05 percent and 3.99 percent, respectively.

Noninterest income for the fourth quarter of 2005, excluding gains on the sale of investment securities, increased $0.8 million or 10 percent, as compared to the same period last year, primarily due to a strong performance in insurance, mortgage banking and debit/credit card activities. Year-to-date noninterest income, excluding gains on the sale of investment securities, increased $3.7 million or 13 percent. Deposit fees, wealth management, mortgage banking, insurance, letters of credit, lending and cash management activities all had strong performances for the full year.

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S&T Bancorp
Announces Earnings
Page 3 of 5

Realized equity security gains for the fourth quarter and year-to-date 2005 were $1.2 million and $5.0 million, respectively. Realized equity security gains for the fourth quarter and full year 2004 were $1.1 million and $5.4 million. Market value and unrealized gains in the equity securities portfolios at December 31, 2005 were $65.1 million and $19.7 million, respectively, as compared to $74.6 million and $27.7 million at December 31, 2004.

Noninterest expense increased for the fourth quarter and full year 2005 by $0.5 million and $2.5 million, respectively, as compared to the same periods of 2004. The primary factors in the full year increase is a $1.9 million increase in salaries and benefits and a $1.3 million increase in occupancy, equipment and data processing expenses. Salary and benefits expenses reflect the impact of normal merit increases and the addition of 12 average full-time equivalent staff to accommodate business expansion. Occupancy, equipment and data processing expense increases for the 2005 year-to-date period were affected by several facility restructurings which included the loss on the sale of an obsolete branch building, the donation of two branches to local municipalities, the write-off of leasehold improvements in a vacated leased office, as well as the addition of 5 new branches. The efficiency ratio, which measures noninterest expense to core revenue, was 43 percent in the fourth quarter of 2005, as compared to 43 percent in the fourth quarter of 2004. The efficiency ratio for the year ended December 31, 2005 was 42 percent as compared to 43 percent last year.

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S&T Bancorp
Announces Earnings
Page 4 of 5

Asset quality continued to be an area of focus. Nonperforming assets totaled $14.9 million or 0.47 percent of total assets at December 31, 2005 as compared to $10.3 million or 0.33 percent at September 30, 2005 and $8.4 million or 0.28 percent at December 31, 2004. The increase in nonperforming assets during the fourth quarter of 2005 is primarily attributable to a $4.6 million commercial real estate loan classified as nonperforming and a $2.4 million residential development property acquired through foreclosure. The allowance for loan losses was $36.6 million at December 31, 2005 as compared to $34.3 million at December 31, 2004. The ratio of the allowance for loan losses compared to total loans is 1.47 percent at December 31, 2005 and 1.50 percent at December 31, 2004.

Net loan charge-offs for the full year 2005 were $1.7 million or 0.07 percent of average loans on an annualized basis compared to $1.6 million or 0.07 percent for 2004. 2004 net loan charge-offs were affected by two significant troubled commercial loan relationships that were satisfactorily resolved during the fourth quarter of 2004, resulting in net recoveries of $2.6 million for the quarter.

In the fourth quarter of 2005, S&T recorded a provision for loan losses of $1.5 million as compared to a negative provision of $0.5 million in the fourth quarter of 2004. Year-to-date 2005, the provision for loan losses was $5.0 million as compared to $4.4 million for the year ended December 31, 2004. The provision, which is based upon management's detailed quarterly analysis of the adequacy of the allowance for loan losses, is directionally consistent with the trends in asset quality. Miller added, "Asset quality is a cardinal commitment at S&T, and we continue to be very aggressive in dealing with potential problem loans. This is especially important in dealing with potential problems in our commercial loan portfolio since these loans tend to be larger and, by their nature, may take longer to resolve."

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S&T Bancorp
Announces Earnings
Page 5 of 5

S&T Bancorp, Inc. declared a common stock quarterly cash dividend of $0.29 per share on December 19, 2005. The dividend is payable on January 25, 2006 to shareholders of record as of December 30, 2005. This dividend represents a 7 percent increase over the $0.27 per share quarterly dividend declared a year ago and a 3 percent projected yield utilizing the December 31, 2005 closing market price of $36.82. The S&T Board of Directors also authorized a stock buyback program on December 20, 2004 of up to one million shares, or approximately 4 percent of shares outstanding. During 2005, S&T repurchased 660,400 shares under this program at an average cost of $35.09 per share. The remaining shares authorized under this program expired at December 31, 2005. On December 19, 2005, the S&T Board of Directors authorized a new buyback program for 2006 of up to 1 million shares, or approximately 4 percent of shares outstanding.

Headquartered in Indiana, PA, S&T Bancorp, Inc. operates 50 offices within Allegheny, Armstrong, Blair, Butler, Cambria, Clarion, Clearfield, Indiana, Jefferson and Westmoreland counties. With assets of $3.2 billion, S&T Bancorp, Inc. stock trades on the NASDAQ National Market System under the symbol STBA.

This information may contain forward-looking statements regarding future financial performance which are not historical facts and which involve risks and uncertainties. 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, change in interest rates, deposit flows, loan demand, asset quality, including real estate and other collateral values, and competition. This information should be read in conjunction with the audited financial statements and analysis as presented in the Annual Report on Form 10-K for S&T Bancorp, Inc. and subsidiaries.

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S&T Bancorp, Inc. Consolidated Selected Financial Data December 31, 2005 (Dollars in thousands, except per share data)										Page 1 of 3
	2004				2005				Year-to-date
For the period:	March 1Q	June 2Q	September 3Q	December 4Q	March 1Q	June 2Q	September 3Q	December 4Q	December 2005		December 2004
Interest Income	$35,596	$36,235	$37,726	$39,075	$39,466	$42,144	$44,035	$46,476	$172,122		$148,638
Interest Expense	9,506	9,542	10,549	11,287	12,148	13,780	15,595	17,991	59,514		40,890
Net Interest Income	26,090	26,693	27,177	27,788	27,318	28,364	28,440	28,485	112,608		107,748
Taxable Equivalent Adjustment	920	923	927	936	975	1,002	1,024	1,041	4,042		3,706
Net Interest Income (FTE)	27,010	27,616	28,104	28,724	28,293	29,366	29,464	29,526	116,650		111,454
Provision For Loan Losses	1,500	1,900	1,500	(500)	800	(300)	3,000	1,500	5,000		4,400
Net Interest Income After           Provisions (FTE)	25,510	25,716	26,604	29,224	27,493	29,666	26,464	28,026	111,650		107,054
Security Gains, Net	1,520	1,708	1,144	972	1,668	801	1,300	1,239	5,008		5,344
Service Charges and Fees	2,232	2,359	2,316	2,476	2,181	2,338	2,504	2,564	9,587		9,383
Wealth Management	1,517	1,525	1,471	1,688	1,643	1,831	1,760	1,743	6,977		6,201
Insurance	1,076	1,115	1,219	1,148	1,403	1,387	1,403	1,492	5,685		4,558
Other	2,048	2,474	1,814	2,380	2,191	2,948	2,473	2,699	10,311		8,716
Total Other Income	6,873	7,473	6,820	7,692	7,418	8,504	8,140	8,498	32,560		28,858
Salaries and Employee Benefits	8,292	8,006	8,438	8,109	8,798	8,440	8,754	8,723	34,715		32,845
Occupancy and Equip. Expense, Net	1,720	1,710	1,752	1,900	2,290	1,939	1,892	1,946	8,067		7,082
Data Processing Expense	999	975	956	1,036	1,035	1,092	1,046	1,117	4,290		3,966
FDIC Expense	73	74	72	70	74	75	71	72	293		289
Other	3,653	4,049	3,678	4,630	3,876	4,059	2,932	4,415	15,281		16,009
Total Other Expense	14,737	14,814	14,896	15,745	16,073	15,605	14,695	16,273	62,646		60,191
Income Before Taxes	19,166	20,083	19,672	22,143	20,506	23,366	21,209	21,490	86,572		81,065
Taxable Equivalent Adjustment	920	923	927	936	975	1,002	1,024	1,041	4,042		3,706
Applicable Income Taxes	5,290	5,588	5,468	6,655	5,711	6,871	5,818	5,886	24,287		23,001
Net Income	$12,956	$13,572	$13,277	$14,552	$13,820	$15,493	$14,367	$14,563	$58,243		$54,358
Per Common Share Data:
Shares Outstanding at End of Period	26,619,399	26,261,769	26,513,869	26,600,395	26,584,029	26,200,529	26,364,095	26,270,730	26,270,730		26,600,395
Average Shares Outstanding - Diluted	26,950,542	26,644,177	26,709,616	26,896,777	26,951,090	26,644,682	26,618,216	26,542,511	26,688,148		26,799,451
Net Income - Diluted	$0.48	$0.51	$0.50	$0.54	$0.51	$0.58	$0.54	$0.55	$2.18		$2.03
Dividends Declared	$0.26	$0.27	$0.27	$0.27	$0.28	$0.28	$0.28	$0.29	$1.13		$1.07
Book Value	$12.74	$12.25	$12.77	$13.12	$13.06	$13.09	$13.35	$13.41	$13.41		$13.12
Market Value	$30.06	$31.98	$35.71	$37.69	$35.40	$36.10	$37.80	$36.82	$36.82		$37.69

S&T Bancorp, Inc. Consolidated Selected Financial Data December 31, 2005 (Dollars in thousands)								Page 2 of 3
	2004				2005
	March	June	September	December	March	June	September		December
Asset Quality Data	1Q	2Q	3Q	4Q	1Q	2Q	3Q		4Q
Nonaccrual Loans and Nonperforming Loans	$12,465	$13,514	$15,895	$6,309	$7,331	$5,944	$8,368		$11,166
Assets acquired through foreclosure or      repossession	2,287	521	2,822	2,119	1,536	945	1,908		3,712
Nonperforming Assets	14,752	14,035	18,717	8,428	8,867	6,889	10,276		14,878
Allowance for Loan Losses	32,658	32,792	32,127	34,262	34,339	33,525	36,093		36,572
Nonperforming Loans / Loans	0.57%	0.60%	0.69%	0.28%	0.32%	0.25%	0.35%		0.45%
Allowance for Loan Losses / Loans	1.50%	1.46%	1.40%	1.50%	1.48%	1.40%	1.50%		1.47%
Allowance for Loan Losses / Nonperforming     Loans	262%	243%	202%	543%	468%	564%	431%		328%
Net Loan Charge-offs (Recoveries)	320	1,765	2,166	(2,635)	723	(455)	432		1,021
Net Loan Charge-offs (Recoveries)     (annualized)/ Average Loans	0.06%	0.32%	0.38%	-0.46%	0.13%	-0.08%	0.07%		0.17%
Balance Sheet (Period-End)
Assets	$2,956,404	$3,006,203	$3,009,776	$2,989,034	$3,027,881	$3,095,177	$3,104,433		$3,194,979
Earning Assets	2,776,693	2,823,231	2,829,035	2,805,522	2,841,330	2,900,582	2,909,863		2,986,081
Securities	592,761	576,612	536,783	518,171	522,631	509,985	499,545		494,575
Loans, Gross	2,183,931	2,246,619	2,292,253	2,287,351	2,318,699	2,390,598	2,410,318		2,491,506
Total Deposits	1,977,330	1,976,340	2,079,182	2,176,263	2,168,932	2,208,204	2,306,604		2,418,884
Non-Interest Bearing Deposits	382,110	376,471	416,748	415,812	404,557	409,721	417,894		435,672
NOW, Money Market & Savings	756,965	742,582	772,783	896,395	904,809	922,923	965,625		1,050,104
CD's $100,000 and over	176,512	187,574	197,347	192,761	187,010	201,076	210,024		206,666
Other Time Deposits	661,743	669,713	692,304	671,295	672,556	674,484	713,061		726,442
Short-term borrowings	463,000	542,598	456,684	323,384	399,846	410,362	314,467		287,829
Long-term Debt	116,890	116,894	86,328	86,303	61,115	81,080	83,860		83,776
Shareholder's Equity	339,095	321,625	338,575	349,129	347,279	342,852	351,983		352,421
Balance Sheet (Daily Averages)
Assets	$2,908,794	$2,979,134	$3,002,225	$3,000,134	$2,998,237	$3,061,157	$3,090,488		$3,141,728
Earning Assets	2,732,315	2,798,943	2,821,311	2,818,925	2,813,642	2,869,845	2,897,199		2,947,840
Securities	597,845	583,192	555,568	530,547	518,872	516,704	504,806		495,676
Loans, Gross	2,134,470	2,215,751	2,264,843	2,285,101	2,294,699	2,353,141	2,381,551		2,452,165
Deposits	1,955,025	1,982,751	2,040,251	2,116,041	2,157,201	2,188,288	2,269,085		2,348,991
Shareholder's Equity	341,835	330,474	333,545	347,105	353,472	347,871	351,432		353,373

S&T Bancorp, Inc. Consolidated Selected Financial Data December 31, 2005 (Dollars in thousands, except per share data)										Page 3 of 3
	2004				2005				Year-to-date
	March	June	September	December	March	June	September	December	December		December
Profitability Ratios (annualized)	1Q	2Q	3Q	4Q	1Q	2Q	3Q	4Q	2005		2004
Return on Average Assets	1.79%	1.83%	1.76%	1.93%	1.87%	2.03%	1.84%	1.84%	1.90%		1.83%
Return on Average Shareholder's Equity	15.24%	16.52%	15.84%	16.68%	15.86%	17.86%	16.22%	16.35%	16.57%		16.07%
Yield on Earning Assets (FTE)	5.39%	5.35%	5.46%	5.66%	5.84%	6.04%	6.18%	6.40%	6.12%		5.47%
Cost of Interest Bearing Funds	1.79%	1.74%	1.90%	2.06%	2.27%	2.46%	2.73%	3.07%	2.64%		1.87%
Net Interest Margin (FTE)(4)	3.98%	3.97%	3.96%	4.05%	4.08%	4.10%	4.03%	3.97%	4.05%		3.99%
Efficiency Ratio (FTE)(1)	43.49%	42.22%	42.66%	43.24%	45.01%	41.21%	39.08%	42.80%	41.99%		42.90%
Capitalization Ratios
Dividends Paid to Net Income	53.48%	51.06%	53.34%	49.20%	51.96%	48.16%	51.08%	50.69%
Shareholder's Equity to Assets (Period End)	11.47%	10.70%	11.25%	11.68%	11.47%	11.08%	11.34%	11.03%
Leverage Ratio (2)	9.15%	8.80%	9.15%	9.51%	9.68%	9.27%	9.56%	9.50%
Risk Based Capital - Tier I (3)	10.55%	10.10%	10.44%	10.84%	10.86%	10.29%	10.73%	10.52%
Risk Based Capital - Tier II (3)	12.31%	11.78%	12.13%	12.58%	12.52%	11.89%	12.35%	12.09%
Definitions: (1) Recurring non-interest expense divided by recurring non-interest income plus net interest income, on a fully taxable equivalent basis. (2) Equity less goodwill to total assets and allowance for loan losses. (3) Effective October 1, 1998, banking regulators require financial institutions to include 45% of the pretax net unrealized holding gains on available for sale equity securities in Tier 2 capital. (4) Net interest income, on a fully taxable equivalent basis, annualized divided by quarter-to-date average earning assets.