Announced by the USPS on October 24, 2022.

Among nature’s most beautiful wonders, waterfalls come in all shapes and sizes, from serene cascades to mighty cataracts. The Postal Service celebrates the variety and beauty of American waterfalls with 12 new stamps. Each stamp features a photograph with the name of the waterfall and state in which it is located. Art director Greg Breeding designed the stamps and pane with existing photographs.

New information will appear below the line, with the most recent at the top.

Updated (catching up) September 7^th:
How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at store.usps.com/store/home. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

FDOI – Waterfall Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by October 13, 2023.

Technical Specifications:

Issue: Waterfalls Stamps
Item Number: 580900
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 12 (12 designs)
Series: N/A
Issue Date & City: June 13, 2023, Yellowstone National Park, WY 82190
Art Director: Greg Breeding, Charlottesville, VA
Designer: Greg Breeding, Charlottesville, VA
Existing Photo: Tim Fitzharris
Existing Photo: Kevin Schafer
Existing Photo: John Cancalosi
Existing Photo: Joe Miller
Existing Photos: David B. Vernon
Existing Photo: Sandra Woods
Existing Photo: Nicole Nugent
Existing Photo: Quang-Tuan Luong
Existing Photo: Kenneth Keifer
Modeler: Joe Sheeran
Manufacturing Process: Offset
Printer: Ashton Potter (USA) Ltd (APU)
Press Type: Muller A76
Stamps per Pane: 12
Print Quantity: 34,992,000 stamps
Paper Type: Nonphosphored Type III, Block Tagged
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Vertical
Image Area (w x h): 1.225 x 1.56 in / 31.115 x 39.624 mm
Overall Size (w x h): 1.255 x 1.59 in / 31.877 x 40.386 mm
Full Pane Size (w x h): 7.8132 x 6.6257 in / 198.4552 x 168.2927 mm
Press Sheets Size (w x h): 24.1896 x 20.6271 in / 614.4158 x 523.9283 mm
Plate Size: 108 stamps per revolution
Plate Number: “P” followed by four (4) single digits in two corners
Marginal Markings:
Front: Header: Waterfalls • Plate number in bottom 2 corners
Back: ©2022 USPS • USPS logo • Two barcodes (580900) • Plate position diagram (9) • Promotional text