Probably.
See http://www.ct.gov/drs/lib/drs/forms/1-2017/income/booklets/ct-1040_online_instruction_booklet_1217.p...
page 9 (CT Gross include includes IRA distributions).
The way it works is that your CT income is your federal income with certain adjustments (see CT-1040 schedule 1). There is no adjustment for IRA distributions. So if your distribution is gross income for the Feds, it is for CT. If it isn't taxable to the feds, it isn't taxable to CT. (For example if it is a Roth-IRA distribution or some of the distribution is the return of after-tax contributions).
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