If I contribute to a 457(b) plan, am I able to deduct a contribution to a traditional IRA?

[ChristinaS]

Maybe.

Whether an IRS contribution is deductible or not also depends on your income, your filing status, and whether your spouse (if married) is covered by a plan at work.

Since you yourself are covered by a plan, use the chart below to determine any deduction for a contribution made by you:

https://www.irs.gov/retirement-plans/plan-participant-employee/2016-ira-contribution-and-deduction-l...

If you are married and your spouse is not covered by a plan, the income limit is higher if the contribution is made by the spouse instead:

https://www.irs.gov/retirement-plans/plan-participant-employee/2016-ira-contribution-and-deduction-l...