TrustCo Bank Corp NY (TRST) 8-K Other Events

Exhibit 99(a)

Shareholder Assembly Agenda

•State of the Industry / Economy

•Summary of Expansion Plan

•Financial Performance

•Stock Performance

•Future Plans

•Things to be Proud Of

•Questions and Answers

•Economic Conditions - Unemployment Level

                                       - Housing Market

•Increasing Regulation

•Government Intervention

•Large Deficits / Low Interest Rates / Rising
Inflation?

•Asset Quality

State of the Industry

•Our Major Branch Expansion is Now
Complete

•Look for Selected, Opportunistic Branch
Openings Going Forward

•Review of Expansion

Summary of Expansion Plan

Number of Branches

Efficiency Ratio (%)

Financial Performance

Key Metrics Driving Profitability have Turned in Recent Quarters

Net Interest Margin (%)

Return on Average Assets (%)

Financial Performance

Key Metrics Driving Profitability have Turned in Recent Quarters

Deposits

($ - Billions)

Loans

TrustCovs.Peers

	TrustCo	Peers*
Return on Average Equity	11.70%	2.10%
Return on Average Assets	0.79%	0.28%
Efficiency Ratio	57.02%	61.41%

*All banking institutions covered by SNL Financial with assets of $2 to $10 billion as of December 31, 2009

Other Key Indicators

•Non-Performing Loans

•Efficiency Ratio

•Average Assets Per Employee

Stock Performance

“Crisis Period”

Stock Performance

5 Year

•We are Working to Capitalize on Our
Expanded Branch Network

•Branch Maturity

•Expense Management

•Net Interest Margin

•Loan Portfolio Management

Future Plans

Things to be Proud Of

•Top 10 of “Banking’s Top Performers” - ABA Banking
Journal, 2009

•Audit Integrity Top 100 - Audit Integrity Independent
Research, 2009-2010

•Top 30 of “Top 150 Performers” - Bank Director Magazine,
2008-2010

•Robert T. Cushing, CFO of the Year - Capital Region
Business Review, 2009

•Top 20 of “Top 100 Thrifts” - SNL Thrift Investor, 2005-
2009

•Top 10 of “Top 200 Mid Tier Banks” - US Banker
Magazine, 2007-2009

Things to be Proud Of

2010 Annual Meeting

Questions and Answers

2010 Annual Meeting

Thank You for Attending