Acadia National Park zip code at a glance
Acadia National Park does not have a dedicated zip code of its own. Mail addressed to the park uses nearby post offices in Bar Harbor, Ellsworth, and other towns. The primary zip code most often associated with the park area is 04609 (Bar Harbor). For general delivery and packages, use 04609 or the specific town code matching where you are staying or where you want the mail delivered. Visitor centers, campgrounds, and lodges rely on these surrounding post offices for sorting and delivery.
Why Acadia doesn’t have its own zip code
Acadia National Park is a federal unit of the National Park Service spread across multiple towns, islands, and coastal segments in Hancock County, Maine. The U.S. Postal Service assigns zip codes by delivery point and post office jurisdiction, not by federal land boundaries. Because the park spans several communities without a single primary mailing address, it relies on the established zip codes of neighboring towns. This is common for national parks that cross municipal or unincorporated boundaries. When you send mail to Acadia, using the correct nearby zip code helps ensure timely delivery.
Bar Harbor zip code (04609)
Bar Harbor is the most well-known gateway town to Acadia National Park and shares its name with the park in many visitor references. The zip code 04609 serves Bar Harbor’s residential neighborhoods, the main village, and critical park facilities such as the Hulls Cove Visitor Center and the Bar Harbor retail corridor. Lodging, major campgrounds like Blackwoods, and several park-operated services are located in or near Bar Harbor, making 04609 the de facto zip code most visitors and vendors use.
Ellsworth zip code (04605)
Ellsworth is the county seat and a key service and logistics hub for Acadia. The park’s headquarters and the main NPS administrative offices are located here, making 04605 important for official correspondence. Some regional suppliers, utility services, and maintenance facilities also operate under this zip code. For business mail, government communication, or services related to park operations, 04605 is frequently the point of contact.
Other nearby zip codes
Several other zip codes cover communities that either border the park or serve visitors accessing different entry points. Somesville on Mount Desert Island uses 04676, while Northeast Harbor and Southwest Harbor share 04662. Winter Harbor and areas south of Bar Harbor use 04692. If you are staying in a smaller town, rental, or seasonal property, confirm the local zip code at the property or with your host to avoid mail delays.
How to address mail to Acadia National Park
When sending letters, packages, or postcards to Acadia, include the specific recipient location or the nearest post office rather than a park-wide zip. Use one of the following formats depending on where you want the item delivered:
- For general lodging or visitor services in Bar Harbor: Recipient Name, Address, City, State, 04609
- For park headquarters or formal correspondence: Recipient Name, Position, Acadia National Park, 1234 Park Loop Road, Ellsworth, ME 04605
- For island communities such as Northeast Harbor: Recipient Name, Address, City, State, 04662
When in doubt, 04609 is the most reliably routed code for visitor-related mail, while 04605 is best for official NPS correspondence.
Practical tips for visitors sending mail
- Use 04609 for postcards, gifts, and packages to your lodging or to park visitor centers.
- Use 04605 for formal inquiries, press requests, or communications addressed to park officials.
- Renters and seasonal residents should double-check the host or property listing for the exact zip code to avoid delivery issues.
- Expect longer delivery times during peak summer months when volume increases at Bar Harbor and Ellsworth post offices.
- For time-sensitive items, consider using a delivery service or sending from a nearby town with extended post office hours.
Nearby zip code reference table
| Location | Purpose | Zip Code |
|---|---|---|
| Bar Harbor (visitor services, lodging) | General visitor mail and packages | 04609 |
| Ellsworth (park headquarters) | Official correspondence and NPS mail | 04605 |
| Somesville (Mount Desert Island) | Island lodging and retail | 04676 |
| Northeast Harbor / Southwest Harbor | Island residential and visitor addresses | 04662 |
| Winter Harbor | Southern area mail delivery | 04692 |
Delivery considerations and timing
Mail delivery within the park area follows standard U.S. Postal Service schedules, but seasonal demand can slow service. Summer months bring high volume, so sending packages well before travel dates is recommended. If you are planning a visit and need gear or supplies shipped, allow extra time or use a private carrier with defined delivery windows. Local post offices in Bar Harbor and Ellsworth often provide package pickup and drop-box services for convenience.
Key takeaways
- Acadia National Park shares zip codes with surrounding towns; it does not have a unique zip code.
- 04609 (Bar Harbor) is the most common zip for visitor services and lodging.
- 04605 (Ellsworth) is best for official park headquarters mail.
- Island communities each have their own zip codes (for example, 04662 and 04676).
- Always confirm the exact zip with hosts or local guides if you are staying outside the main village centers.