yes
A Roth IRA is an IRA that, except as explained below, is subject to the rules that apply to a traditional IRA. You cannot deduct contributions to a Roth IRA. If you satisfy the requirements, qualified distributions are tax-free. You can make contributions to your Roth IRA after you reach age 70 ½. You can leave amounts in your Roth IRA as long as you live. The account or annuity must be designated as a Roth IRA when it is set up. There is a maximum amount you can put in every year into an IRA. As of 2011, it is currently $5000/year for anyone age 49 and below; $6000/year if you are age 50 and above. Contributions to a Roth IRA are not tax-deductible. When you make withdrawals from your Roth IRA, your withdrawals come out tax-free. Yes, but combined contribution limits apply. For 2008 the maximum contribution amount is $5,000 for individuals under 50 years of age and $6,000 for those over 50. If you are … under 50 and contribute $2,000 to your Roth IRA then you can only contribute $3,000 to your Traditional IRA. For a traditional IRA, you no longer can contribute after the age of 70 1/2 (RMD checks in). For Roth, you can contribute forever since no RMD are taken from this type of IRA account IRA Contribution Limit. After age 50, you can put no more than $6,000 per year in your IRA(s). As regards contributions, the IRS sees all IRAs as one IRA. So if you have two IRAs, you can, for example, contribute $4,000 to one and $2,000 to the other. In addition, you can contribute no more than you earn. If you earn only $3,000 doing part-time work after retirement, for example, you can contribute only $3,000 that year. Clarifications. Although you can contribute to a Roth IRA during your retirement years, you cannot contribute unlimited amounts of money. The IRS enforces contribution limits for traditional and Roth IRAs regardless of age. In 2010, for example, you could contribute $6,000 if you are older than 50. Benefits. Once money is in a Roth IRA account, it grows tax-free. Contributions to a Roth IRA account after you retire--if you can afford to make them--could help make your later years more comfortable. A Roth IRA is an individual retirement account to which you contribute after-tax dollars. Contributions and earnings can grow tax-free, and you can withdraw them tax-free after age 59½. Depending on your situation, a Roth IRA can be more flexible than a 401(k) or Traditional IRA. A Roth IRA conversion allows you to move assets from a Traditional IRA, SEP-IRA, SIMPLE IRA, or certain employer-sponsored retirement accounts (such as 401(k)s) to a Roth IRA. However, in the case of inherited accounts, you can only convert to a Roth IRA if you inherited the Traditional IRA from your spouse. You can contribute up to $5,000 to your own Roth IRA (up to $6,000 if you’re 50 or older during the year) and up to $5,000 for your wife (or $6,000 if she’s 50 or older), as long as you earned at least as much for the year as the combined contributions.  Roth vs. traditional IRA. Whether to use a Roth or a traditional IRA for those contributions depends on your individual tax situation. Hevert favors the Roth because there is no RMD, so funds can continue to grow throughout retirement and can be tapped at a later date in retirement or left to heirs in an estate. 
https://www.irs.gov/retirement-plans/roth-iras http://www.answers.com/Q/Can_you_contribute_to_a_Roth_IRA_after_you_have_retired http://finance.zacks.com/can-open-ira-im-retired-2328.html http://www.ehow.com/info_8085240_can-roth-ira-after-retire.html http://www.schwab.com/public/schwab/investing/retirement_and_planning/understanding_iras/faqs http://www.kiplinger.com/article/retirement/T046-C001-S001-making-roth-ira-contributions-in-retirement.html http://www.bankrate.com/finance/retirement/contributing-to-an-ira-during-retirement.aspx
can you contribute to a roth ira after retirement