ACA Open Enrollment 2027 Deadlines by State: When Each State Exchange Closes

State exchanges set their own 2027 open enrollment deadlines: Idaho’s Your Health Idaho ends Dec. 15, Vermont Health Connect ends Dec. 28, and Covered California and New Jersey’s exchange run through Jan. 31, 2027, each according to its own site or press release. HealthCare.gov closes Friday, Jan. 15, 2027, per the Centers for Medicare & Medicaid Services (CMS). This page is the state lookup for the Affordable Care Act (ACA) Marketplace; the federal window, and why it was not shortened, is in our HealthCare.gov dates story.

ACA open enrollment deadlines for 2027 by state

We read each exchange’s official page or press release on Nov. 6, 2026. A blank “not confirmed” cell means that exchange’s page did not state the date in the sources we could read, not that no deadline exists.

Exchange	Opens	Deadline for Jan. 1 coverage	Open enrollment ends	Also stated
HealthCare.gov (states without their own exchange)	Sun., Nov. 1	Tue., Dec. 15	Fri., Jan. 15, 2027	CMS: “runs through January 15, 2027”
California (Covered California)	Sun., Nov. 1	Thu., Dec. 31 (apply by)	Sun., Jan. 31, 2027	Feb. 1 deadline not stated
Colorado (Connect for Health Colorado)	Sun., Nov. 1	Tue., Dec. 15	Fri., Jan. 15, 2027
Connecticut (Access Health CT)	Fri., Oct. 23	Tue., Dec. 15	Fri., Jan. 15, 2027	Dec. 16 to Jan. 15 enrollments start Feb. 1
Georgia (Georgia Access)	Sun., Nov. 1	Tue., Dec. 15	Fri., Jan. 15, 2027	Jan. 15 for coverage starting Feb. 1
Idaho (Your Health Idaho)	Thu., Oct. 15	Not stated separately	Tue., Dec. 15	Page heading: “Oct. 15 – Dec. 15”
Illinois (Get Covered Illinois)	Sun., Nov. 1	Tue., Dec. 15	Fri., Jan. 15, 2027
Kentucky (Kentucky Health Benefit Exchange)	Sun., Nov. 1	Tue., Dec. 15	Fri., Jan. 15, 2027	Enroll through kynect
Maine (CoverME.gov)	Not confirmed	Tue., Dec. 15	Not confirmed
Maryland (Maryland Health Connection)	Not confirmed	Not confirmed on the exchange	Fri., Jan. 15, 2027	End date from two Maryland newsrooms (see below)
Minnesota (MNsure)	Not confirmed	“Before Dec. 15”	Not confirmed	Jan. 15 for coverage on Feb. 1
Nevada (Nevada Health Link)	Sun., Nov. 1	Not stated	Fri., Jan. 15, 2027
New Jersey (GetCoveredNJ)	Not confirmed	Thu., Dec. 31	Sun., Jan. 31, 2027	Department of Banking and Insurance (DOBI) release, Oct. 28, 2026
New Mexico (beWellnm)	Sun., Nov. 1	Not stated	Fri., Jan. 15	Home page shows no year
Oregon (Explore Health)	Sun., Nov. 1	Thu., Dec. 31	Fri., Jan. 15, 2027	New marketplace for 2027
Vermont (Vermont Health Connect)	Sun., Nov. 1	Tue., Dec. 15	Mon., Dec. 28	Dec. 28 is also the deadline for Feb. 1 coverage
Washington (Washington Healthplanfinder)	Not confirmed	Thu., Dec. 31	Not confirmed	Jan. 15, 2027 for coverage starting Feb. 1

Weekdays are computed from the dates; the exchanges’ pages print the dates only. Sources are linked at the bottom of this page.

Which dates stand out?

Among the 16 state exchanges in the table:

• Earliest start: Your Health Idaho opens Thursday, Oct. 15, and Connecticut’s open enrollment began Friday, Oct. 23, according to the Connecticut Insurance Department’s July 15, 2026 notice. HealthCare.gov and the other exchanges that state an opening day use Nov. 1.
• Earliest end: Idaho closes Tuesday, Dec. 15, the same day HealthCare.gov’s Jan. 1 coverage deadline falls. Vermont Health Connect closes Monday, Dec. 28.
• Latest end: Covered California’s release says enrollment runs “through Jan. 31, 2027,” and the New Jersey Department of Banking and Insurance says the same date for GetCoveredNJ. Both ask people to enroll by Dec. 31 for Jan. 1 coverage.
• Jan. 15 closers: Colorado, Connecticut, Georgia, Illinois, Kentucky, Nevada, New Mexico and Oregon list Jan. 15, 2027, the same as HealthCare.gov. Maryland does too, according to two Maryland newsrooms, the first (WYPR) and the second (WMAR), branded WMAR 2 News.

If you live in one of the states that ends Dec. 15 or Dec. 28, do not assume the Jan. 15 date you see in national coverage applies to you.

Which states have their own exchange, and what changed in Oregon?

CMS’s State-based Exchanges page, updated Aug. 13, 2026, lists 21 state-based exchanges for plan year 2026 and Oregon as transitioning for 2027. Oregon Health Authority (OHA) confirmed the switch in its Nov. 2, 2026 release: Explore Health “replaces the federal platform HealthCare.gov,” open enrollment runs Nov. 1, 2026, through Jan. 15, 2027, and people “should enroll by Dec. 31 for coverage that begins Jan. 1, 2027.”

Maryland: what two newsrooms report

We did not confirm the Maryland dates on the Maryland Health Connection site, so the end date rests on two independent reports. WYPR (Nov. 2, 2026) says enrollment “will stay open until Jan. 15, 2027,” and WMAR 2 News reports the same Jan. 15, 2027 end. The Dec. 31 deadline for Jan. 1 coverage that WMAR 2 News gives appears in only one report, so it is not confirmed on Maryland Health Connection and is left out of the table.

Exchanges whose 2027 dates are not confirmed

We could not confirm 2027 dates on an official page for the District of Columbia (DC Health Link), Massachusetts (Massachusetts Health Connector), New York (NY State of Health), Pennsylvania (Pennie), Rhode Island (HealthSource RI) and Virginia (Virginia’s Insurance Marketplace). Check the exchange directly. States that have no exchange of their own use HealthCare.gov and its Nov. 1 to Jan. 15 window.

ACA deadline dates to mark on your calendar

Pencil in the dates that apply to your exchange: Dec. 15 on the December 2026 calendar, Dec. 31 for the exchanges that ask for it by then, and Jan. 15 or Jan. 31 on the January 2027 calendar. The November 2026 calendar shows the Nov. 1 opening day. Our free printable puts the same dates for HealthCare.gov and the 16 exchanges on one page; it is under the downloads on this page. People with Medicare have a separate window; see Medicare open enrollment, ending Dec. 7.