The Dreyfus Third Century Fund, Inc.
	Summary Prospectus October 1, 2015
		ClassTicker ADTCAX CDTCCX IDRTCX ZDRTHX

Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You can find the fund's prospectus and other information about the fund, including the statement of additional information and most recent reports to shareholders, online at www.dreyfus.com/funddocuments. You can also get this information at no cost by calling 1-800-DREYFUS or by sending an e-mail request to info@dreyfus.com. The fund's prospectus and statement of additional information, dated October 1, 2015 (each as revised or supplemented), are incorporated by reference into this summary prospectus.

Investment Objective

The fund seeks to provide capital growth, with current income as a secondary goal.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section beginning on page 8 of the prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section beginning on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)
	Class A	Class C	Class I	Class Z
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75	none	none	none
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)	none*	1.00	none	none
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
	Class A	Class C	Class I	Class Z
Management fees	.75	.75	.75	.75
Distribution (12b-1) fees	none	.75	none	none
Other expenses (including shareholder services fees)	.45	.46	.15	.23
Total annual fund operating expenses	1.20	1.96	.90	.98

*Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year.

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

0035SP1015

	1 Year	3 Years	5 Years	10 Years
Class A	$690	$934	$1,197	$1,946
Class C	$299	$615	$1,057	$2,285
Class I	$92	$287	$498	$1,108
Class Z	$100	$312	$542	$1,201

You would pay the following expenses if you did not redeem your shares:

	1 Year	3 Years	5 Years	10 Years
Class A	$690	$934	$1,197	$1,946
Class C	$199	$615	$1,057	$2,285
Class I	$92	$287	$498	$1,108
Class Z	$100	$312	$542	$1,201

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 57.09% of the average value of its portfolio.

Principal Investment Strategy

To pursue its goals, the fund, under normal circumstances, invests at least 80% of its net assets in the common stocks of companies that, in the opinion of the fund's management, meet traditional investment standards and conduct their business in a manner that contributes to the enhancement of the quality of life in America.

The fund's investment strategy combines a disciplined investment process that consists of computer modeling techniques, fundamental analysis and risk management with a social investment process. In selecting stocks, the portfolio managers begin by using computer models to identify and rank stocks within an industry or sector, based on several characteristics, including value, growth and financial profile.

Next, based on fundamental analysis, the portfolio managers designate the most attractive of the higher ranked securities as potential purchase candidates, drawing on a variety of sources, including company management and internal as well as Wall Street research.

The portfolio managers then evaluate each stock considered to be a potential purchase candidate, by industry or sector, to determine whether the company enhances the quality of life in America by considering its record in the areas of protection and improvement of the environment and the proper use of our natural resources, occupational health and safety, consumer protection and product purity and equal employment opportunity.

The portfolio managers then further examine the companies determined to be eligible for purchase, by industry or sector, and select investments from those companies the portfolio managers consider to be the most attractive based on financial considerations.

Principal Risks

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general market conditions or because of factors that affect the particular company or the company's industry.

·Social investment risk. Socially responsible investment criteria may limit the number of investment opportunities available to the fund, and as a result, at times the fund's returns may be lower than those funds that are not subject to such special investment considerations.

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Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class Z shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%) Class Z
	Best Quarter Q2, 2009: 17.10% Worst Quarter Q4, 2008: -21.30%

The year-to-date total return of the fund's Class Z shares as of June 30, 2015 was 0.00%.

After-tax performance is shown only for Class Z shares. After tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Average Annual Total Returns (as of 12/31/14)
	1 Year	5 Years	10 Years
Class Z returns before taxes	13.15%	14.33%	7.57%
Class Z returns after taxes on distributions	10.02%	13.40%	7.10%
Class Z returns after taxes on distributions and sale of fund shares	10.07%	12.22%	6.51%
Class A returns before taxes	6.41%	12.69%	6.66%
Class C returns before taxes	11.12%	13.21%	6.51%
Class I returns before taxes	13.27%	14.47%	7.64%
S&P 500 Comp Stock Price Index reflects no deduction for fees, expenses or taxes	13.66%	15.44%	7.67%

Portfolio Management

The fund's investment adviser is The Dreyfus Corporation (Dreyfus).

Investment decisions for the fund are made by members of the Active Equity Team of Mellon Capital Management Corporation (Mellon Capital), an affiliate of Dreyfus. The team members are C. Wesley Boggs, William S. Cazalet, CAIA and Ronald P. Gala, CFA. Messrs. Boggs and Gala have each served as a primary portfolio manager of the fund since May 2012, and Mr. Cazalet has served as a primary portfolio manager of the fund since December 2014. Mr. Boggs is a vice president and senior portfolio manager at Mellon Capital. Mr. Cazalet is a managing director and head of active equity strategies at Mellon Capital. Mr. Gala is a managing director and senior portfolio manager at Mellon Capital. Each member of the team also is an employee of Dreyfus.

Purchase and Sale of Fund Shares

In general, for each share class, the fund's minimum initial investment is $1,000 and the minimum subsequent investment is $100. You may sell (redeem) your shares on any business day by calling 1-800-DREYFUS (inside the U.S. only) or by visiting www.dreyfus.com. If you invested in the fund through a third party, such as a bank, broker-dealer or financial adviser, or in a 401(k) or other retirement plan, you may mail your request to sell shares to Dreyfus Institutional Department, P.O. Box 9882, Providence, Rhode Island 02940-8082. If you invested directly through the fund, you may mail your request to sell shares to

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Dreyfus Shareholder Services, P.O. Box 9879, Providence, Rhode Island 02940-8079. If you are an Institutional Direct accountholder, please contact your BNY Mellon relationship manager for instructions.

Tax Information

The fund's distributions are taxable as ordinary income or capital gains, except when your investment is through an IRA, 401(k) plan or other tax-advantaged investment plan (in which case you may be taxed upon withdrawal of your investment from such account).

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares through a broker-dealer or other financial intermediary (such as a bank), the fund and its related companies may pay the intermediary for the sale of fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

This prospectus does not constitute an offer or solicitation in any state or jurisdiction in which, or to any person to whom, such offering or solicitation may not lawfully be made.

Printed on recycled paper. 50% post-consumer. Process chlorine free. Vegetable-based ink.

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