Shipping · USPS
USPS postcard stamp price, domestic and abroad.
The postcard price for the US and abroad, and the size and thickness rules that decide whether a card pays the postcard price or the letter price.
A domestic postcard stamp is $0.65. An international postcard is $1.75 to Canada, Mexico and every other country.
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USPS postcard stamp price
| Postcard | Price |
|---|---|
| Domestic (single or double postcard) | $0.65 |
| To Canada | $1.75 |
| To Mexico | $1.75 |
| To all other countries | $1.75 |
Notice 123 says the card price applies to each single or double postcard when originally mailed, and that for weights over 3.5 oz the large envelope prices apply.
Card size and thickness standards
To get the postcard price, each card (and each half of a double card) must be rectangular, 3-1/2 to 4-1/4 inches high, 5 to 6 inches long and 0.007 to 0.016 inch thick, and weigh no more than 3.5 oz (DMM 101.6.2.2). “Ineligible cards are subject to letter-size pricing” (DMM 101.6.2.1): the 1 oz letter price is $0.82. A letter-size piece that also has a nonmachinable characteristic (for example an aspect ratio outside 1.3 to 2.5, or being under 0.009 inch thick while more than 6 inches long or 4-1/4 inches high) adds the $0.49 surcharge (DMM 101.1.2), making $1.31.
Frequently asked questions
How much is a postcard stamp?
A domestic postcard is $0.65 and an international postcard is $1.75 under Notice 123 effective October 4, 2026.
Can I use a letter stamp on a postcard?
Any combination of stamps that adds up to at least the postage required works. A postcard needs $0.65, so a 1 oz letter stamp ($0.82) covers it.
Why would a postcard cost more than the postcard price?
A card outside the DMM 101.6.2.2 size and thickness standards is priced as a letter ($0.82 for 1 oz), and adds $0.49 if it also has a nonmachinable characteristic.
How much is an international postcard stamp?
$1.75 to Canada, to Mexico and to all other countries (Notice 123 page 43). See the international letter rates page for letters and large envelopes.
When do USPS prices change?
USPS usually updates its prices in January and July and can also change them at other times. This page is built from Notice 123 effective October 4, 2026. Check the effective date at the top of the official Notice 123; if a newer one is in force, use its figures.
Sources
Checked
- USPS Notice 123, Price List (HTML), effective October 4, 2026
- USPS Notice 123, Price List (PDF)
- DMM 101.6.2: cards claimed at card prices; 101.1.2 nonmachinable criteria
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Prices change: check the date
These figures are USPS list prices from Notice 123 (Price List), effective October 4, 2026, read on 18 October 2026. USPS usually updates prices in January and July and can change them at other times, so if today is after a newer Notice 123 took effect, the official notice wins. Extra services (insurance, tracking add-ons, signature, pickup) and taxes are not included.