Exhibit 99.1

NEWS RELEASE

FOR IMMEDIATE RELEASE

Contact:	William P. Hornby
	whornby@centurybank.com
Phone:	781-393-4630
Fax:	781-393-4071

CENTURY BANCORP, INC. ANNOUNCES INCREASED YEAR-TO-DATE EARNINGS FOR

2013, UP 11%; ASSET GROWTH OF 6.5% TO RECORD SIZE OF $3.3 BB; REGULAR

DIVIDEND DECLARED

Medford, MA, July 9, 2013—Century Bancorp, Inc. (NASDAQ:CNBKA) (www.centurybank.com) (“the Company”) today announced net income of $9,502,000 for the six months ended June 30, 2013, or $1.71 per Class A share diluted, an increase of 10.8% compared to net income of $8,579,000, or $1.55 per Class A share diluted, for the same period a year ago. Total assets increased 6.5% from $3.1 billion at December 31, 2012 to $3.3 billion at June 30, 2013. For the quarter ended June 30, 2013, net income totaled $5,026,000, or $0.90 per Class A share diluted, an increase of 5.3% compared to net income of $4,771,000, or $0.86 per Class A share diluted, for the same period a year ago.

Net interest income totaled $29.1 million for the six months ended June 30, 2013 compared to $29.8 million for the same period in 2012. The 2.5% decrease in net interest income for the period is primarily due to $640,000 of prepayment penalties collected during the first six months of 2012. The net interest margin decreased from 2.50% on a fully taxable equivalent basis in 2012 to 2.21% on the same basis for 2013. This was primarily the result of a decrease in asset yields. Also, interest expense decreased primarily as a result of the continued decline in market rates and there was a 12.3% increase in the average balances of earning assets, combined with a similar increase in average deposits.

The provision for loan losses decreased by $500,000 from $2.0 million for the six months ended June 30, 2012 to $1.5 million for the six months ended June 30, 2013, primarily as a result of a lower level of charge-off activity. The Company capitalized on favorable market conditions for the first six months ended June 30, 2013 and realized net gains on sales of investments of $1.7 million, as compared to $590,000 for the same period in 2012. The Company’s effective tax rate decreased from 6.2% in 2012 to 5.8% in 2013 primarily as a result of an increase in tax-exempt income.

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At June 30, 2013, total equity was $166.2 million compared to $180.0 million at December 31, 2012. The Company’s equity decreased primarily as a result of an increase in other comprehensive loss, net of taxes, and dividends paid, offset somewhat by earnings. Other comprehensive loss, net of taxes, increased as a result of an increase in unrealized losses on securities available-for-sale. Unrealized losses on the available-for-sale portfolio increased as a result of increases in interest rates. The Company’s leverage ratio stood at 6.74% at June 30, 2013, compared to 6.80% at December 31, 2012. The decrease in the leverage ratio is due to an increase in assets. Book value as of June 30, 2013 was $29.92 per share compared to $32.40 at December 31, 2012.

The Company’s allowance for loan losses was $20.5 million or 1.76% of loans outstanding at June 30, 2013, compared to $19.2 million or 1.73% of loans outstanding at December 31, 2012 and $18.0 million or 1.75% of loans outstanding at June 30, 2012. The increase in the allowance for loan losses was due to the increase in the size and composition of the loan portfolio as well as qualitative factors. Non-performing assets totaled $3.3 million at June 30, 2013, compared to $4.5 million at December 31, 2012 and $5.3 million at June 30, 2012.

The Company’s Board of Directors voted a regular quarterly dividend of 12.00 cents ($0.12) per share on the Company’s Class A common stock, and 6.00 cents ($0.06) per share on the Company’s Class B common stock. The dividends were declared payable August 15, 2013 to stockholders of record on August 1, 2013.

The Company, through its subsidiary bank, Century Bank and Trust Company, a state chartered full service commercial bank, operating twenty-five full-service branches in the Greater Boston area, offers a full range of Business, Personal and Institutional Services.

Century Bank and Trust Company is a member of the FDIC and is an Equal Housing Lender.

This press release contains certain “forward-looking statements” with respect to the financial condition, results of operations and business of the Company. Actual results may differ from those contemplated by these statements. The Company wishes to caution readers not to place undue reliance on any forward-looking statements. The Company disclaims any intent or obligation to update publicly any such forward-looking statements, whether in response to new information, future events or otherwise.

Century Bancorp, Inc. and Subsidiaries

Consolidated Comparative Statements of Condition (unaudited)

(in thousands)

	June 30, 2013		December 31, 2012
Assets
Cash and Due From Banks	$	49,192	$	53,646
Federal Funds Sold and Interest-bearing Deposits In Other Banks		122,713		98,637
Short-term Investments		19,611		17,367
Securities Available-For-Sale (AFS)		1,552,216		1,434,801
Securities Held-to-Maturity		267,613		275,507
Federal Home Loan Bank of Boston stock, at cost		16,082		15,146
Loans:
Commercial & Industrial		101,918		88,475
Construction & Land Development		34,919		38,618
Commercial Real Estate		609,462		576,465
Residential Real Estate		283,392		281,857
Consumer and Other		8,123		7,450
Home Equity		125,918		118,923
Total Loans		1,163,732		1,111,788
Less: Allowance for Loan Losses		20,500		19,197
Net Loans		1,143,232		1,092,591
Bank Premises and Equipment		23,367		23,899
Accrued Interest Receivable		6,005		5,811
Goodwill		2,714		2,714
Other Assets		83,191		66,090
Total Assets	$	3,285,936	$	3,086,209
Liabilities
Demand Deposits	$	440,120	$	438,429
Interest Bearing Deposits:
Savings and NOW Deposits		964,923		933,316
Money Market Accounts		769,660		653,345
Time Deposits		466,492		419,983
Total Interest Bearing Deposits		2,201,075		2,006,644
Total Deposits		2,641,195		2,445,073
Borrowed Funds:
Securities Sold Under Agreements to Repurchase		214,290		191,390
Other Borrowed Funds		177,144		195,144
Total Borrowed Funds		391,434		386,534
Other Liabilities		50,991		38,529
Subordinated Debentures		36,083		36,083
Total Liabilities		3,119,703		2,906,219
Total Stockholders’ Equity		166,233		179,990
Total Liabilities & Stockholders’ Equity	$	3,285,936	$	3,086,209

Century Bancorp, Inc. and Subsidiaries

Consolidated Comparative Statements of Income (unaudited)

For the Quarter and Six months ended June 30, 2013 and 2012

(in thousands)

	Quarter ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Interest Income:
Loans	$	11,997	$	12,572	$	23,878	$	24,620
Securities Held-to-Maturity		1,419		1,924		2,939		3,387
Securities Available-for-Sale		5,571		5,668		11,188		11,383
Federal Funds Sold and Interest-bearing Deposits In Other Banks		145		148		264		287
Total Interest Income		19,132		20,312		38,269		39,677
Interest Expense:
Savings and NOW Deposits		649		560		1,259		1,087
Money Market Accounts		582		618		1,114		1,230
Time Deposits		1,234		1,600		2,568		3,281
Securities Sold Under Agreements to Repurchase		89		88		179		180
Other Borrowed Funds and Subordinated Debentures		2,066		2,057		4,092		4,108
Total Interest Expense		4,620		4,923		9,212		9,886
Net Interest Income		14,512		15,389		29,057		29,791
Provision For Loan Losses		750		900		1,500		2,000
Net Interest Income After
Provision for Loan Losses		13,762		14,489		27,557		27,791
Other Operating Income
Service Charges on Deposit Accounts		2,034		1,922		3,976		3,910
Lockbox Fees		838		781		1,610		1,480
Net Gain on Sales of Investments		781		442		1,664		590
Other Income		1,568		843		2,405		1,627
Total Other Operating Income		5,221		3,988		9,655		7,607
Operating Expenses
Salaries and Employee Benefits		8,382		8,191		17,000		16,332
Occupancy		1,193		1,176		2,475		2,298
Equipment		610		544		1,192		1,127
FDIC Assessment		450		445		850		852
Other		3,027		3,095		5,610		5,642
Total Operating Expenses		13,662		13,451		27,127		26,251
Income Before Income Taxes		5,321		5,026		10,085		9,147
Income Tax Expense		295		255		583		568
Net Income	$	5,026	$	4,771	$	9,502	$	8,579

Century Bancorp, Inc. and Subsidiaries

Consolidated Year-to-Date Average Comparative Statements of Condition (unaudited)

(in thousands)

	June 30, 2013		June 30, 2012
Assets
Cash and Due From Banks	$	57,758	$	52,885
Federal Funds Sold and Interest-Bearing Deposits in Other Banks		188,730		200,066
Securities Available-For-Sale (AFS)		1,446,196		1,250,085
Securities Held-to-Maturity		259,812		255,609
Total Loans		1,140,277		996,503
Less: Allowance for Loan Losses		19,828		17,386
Net Loans		1,120,449		979,117
Unrealized Gain on Securities AFS		11,075		16,541
Bank Premises and Equipment		23,689		22,091
Accrued Interest Receivable		6,004		6,168
Goodwill		2,714		2,714
Other Assets		73,617		68,568
Total Assets	$	3,190,044	$	2,853,844
Liabilities
Demand Deposits	$	421,646	$	364,588
Interest Bearing Deposits:
Savings and NOW Deposits		1,010,517		830,199
Money Market Accounts		727,499		656,662
Time Deposits		391,005		422,256
Total Interest Bearing Deposits		2,129,021		1,909,117
Total Deposits		2,550,667		2,273,705
Borrowed Funds:
Securities Sold Under Agreements to Repurchase		203,755		161,112
Other Borrowed Funds		178,896		180,131
Total Borrowed Funds		382,651		341,243
Other Liabilities		41,724		36,564
Subordinated Debentures		36,083		36,083
Total Liabilities		3,011,125		2,687,595
Total Stockholders’ Equity		178,919		166,249
Total Liabilities & Stockholders’ Equity	$	3,190,044	$	2,853,844
Total Average Earning Assets - QTD	$	3,084,217	$	2,761,669
Total Average Earning Assets - YTD	$	3,035,015	$	2,702,263

Century Bancorp, Inc. and Subsidiaries

Consolidated Selected Key Financial Information (unaudited)

(in thousands, except share data)

	June 30, 2013			June 30, 2012
Performance Measures:
Earnings per average Class A share, diluted, quarter	$	0.90		$	0.86
Earnings per average Class A share, diluted, year-to-date	$	1.71		$	1.55
Return on average assets, year-to-date		0.60	%		0.60	%
Return on average stockholders’ equity, year-to-date		10.71	%		10.38	%
Net interest margin (taxable equivalent), quarter		2.16	%		2.52	%
Net interest margin (taxable equivalent), year-to-date		2.21	%		2.50	%
Efficiency ratio, year-to-date		63.3	%		63.7	%
Book value per share	$	29.92		$	30.77
Tangible book value per share	$	29.43		$	30.28
Tangible capital / tangible assets		4.98	%		5.60	%
Common Share Data:
Average Class A shares outstanding, diluted, quarter		5,557,354			5,548,830
Average Class A shares outstanding, diluted, year-to-date		5,557,655			5,547,237
Shares outstanding Class A		3,574,379			3,556,529
Shares outstanding Class B		1,982,180			1,991,880
Total shares outstanding at period end		5,556,559			5,548,409
Asset Quality and Other Data:
Allowance for loan losses / loans		1.76	%		1.75	%
Nonaccrual loans	$	3,260		$	5,313
Nonperforming assets	$	3,260		$	5,313
Loans 90 days past due and still accruing	$	—		$	57
Accruing troubled debt restructures	$	3,492		$	2,274
Net charge-offs, year-to-date	$	196		$	594
Leverage ratio		6.74	%		6.90	%
Tier 1 risk weighted capital ratio		14.00	%		14.36	%
Total risk weighted capital ratio		15.25	%		15.61	%
Total risk weighted assets	$	1,555,727		$	1,393,806