What is MGM National Harbor?
MGM National Harbor is a casino in National Harbor, Maryland in Oxon Hill, Maryland, United States.
About MGM National Harbor
MGM National Harbor is a casino hotel in National Harbor, Maryland, just outside of Washington, D.C. It opened on December 8, 2016, and cost $1.4 billion. It is owned by Vici Properties and operated by MGM Resorts International.
Description from Wikipedia, available under CC BY-SA 4.0.
Everything below is answered from MGM National Harbor's catalog record and the casino rules that apply in United States. Where a fact is not published, the question is left out rather than guessed at.
Where is MGM National Harbor?
MGM National Harbor is at 101 MGM National Avenue, 20745, Oxon Hill, Maryland, United States.
- Coordinates: 38.79506, -77.00891.
How old do you have to be to enter MGM National Harbor?
You must be at least 21 to enter MGM National Harbor, which is the minimum casino age in Maryland.
- 21 in every commercial casino state. Some tribal casinos admit 18-year-olds, and a few states are 18 throughout.
- Carry photo ID even if you are well over the limit — staff check on appearance, not on the paperwork you left at the hotel.
Do you need ID to get into MGM National Harbor?
Yes. Government-issued photo ID is required to claim a jackpot, open a player's-club account or buy alcohol, and is routinely checked at the door for anyone who looks under 30.
Can you smoke inside MGM National Harbor?
MGM National Harbor follows the smoking rules for Maryland. Smoking rules are set state by state and often property by property. Nevada casinos allow smoking at the tables and machines; most other states ban it indoors or confine it to a sealed room.
- A property can always be stricter than the law requires, and many are.
What currency do you need at MGM National Harbor?
MGM National Harbor deals in the US dollar (USD).
- Cash machines on a casino floor charge the worst rates in the building; change money before you arrive.
- On tax: Casino winnings are taxable income. Casinos withhold 24% and issue a W-2G above set thresholds (from $1,200 on a slot jackpot), and non-resident visitors are generally withheld at 30% unless a tax treaty applies.
What other casinos are near MGM National Harbor?
The closest casino to MGM National Harbor is A&A Gaming in Greater Upper Marlboro, about 42 km away in a straight line.
- Distances are straight-line from this venue; road journeys will be longer.
- A&A GamingGreater Upper Marlboro, United States · 42 km
- Maryland Live! CasinoHanover, United States · 47 km
- Horseshoe Casino BaltimoreBaltimore, United States · 63 km
- Horseshoe Casino BaltimoreBaltimore, United States · 63 km
- Hollywood Casino at Charles Town RacesRanson, United States · 92 km
- Hollywood Casino PerryvillePerryville, United States · 120 km
How reliable is this information about MGM National Harbor?
This profile is built from OpenStreetMap and Wikidata, last updated July 2026. Country rules were reviewed in August 2026.
- Opening hours, table minimums and dress codes change without notice — call ahead before a long trip.
- No official website is listed for this venue, so confirm details by phone or with a local source.
Evidence and verification
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This panel separates confirmed facts from listed claims and missing details for MGM National Harbor. Physical casino details can change quickly, so use unknowns as prompts to verify.
Building profile
Source basis
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Identity and location
Address and map coordinates are listed for trip planning.
Not listed yet: gaming floor, table limits, amenities and logistics, hours and access and player reports. Confirm last verification date, current table minimums and maximums, slot count and denomination range, opening hours by day and fresh player reviews with the property before you rely on them.
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