From the USPS on October 29, 2025:

With these stamps, the Postal Service celebrates the 100th anniversary of Route 66, the legendary highway that originally stretched about 2,400 miles from Chicago to Los Angeles. Dubbed “The Mother Road” by author John Steinbeck, Route 66 forever changed how Americans travel and became a symbol of freedom and adventure. The pane of 16 stamps includes photographs by David Schwartz from each of the eight states Route 66 passes through, with each one repeated twice. The selvage features a photo by Schwartz of the open road rolling through hills in Crookton, AZ, along the longest continuous drivable stretch of Route 66 in the state.

More details will be posted below the line, with the most recent information at the top.

Updated July 8^th:
Here are the Scott catalogue numbers for this issue:
6074-81 Route 66
6074 Munger Moss Motel
6075 Ford Model A
6076 Oil Capital Motel
6077 Grants Cafe Sign
6078 Conoco Tower Station
6079 Kan-O-Tex Gas Pump
6080 motel sign
6081 Beverly Hills City Hall

Updated April 15^th:
Technical Specifications:

Issue: Route 66 Stamps
Item Number: 488400
Denomination & Type of Issue: First-Class Mail Forever®
Format: Pane of 16 (8 designs)
Series: N/A
Issue Date & City: May 5, 2026, Phoenix, AZ 85026
Art Director: Greg Breeding, Charlottesville, VA
Designer: Greg Breeding, Charlottesville, VA
Existing Photos: David Schwartz, Lakewood, OH
Modeler: Daryl DeMont
Manufacturing Process: Offset
Printer: Ashton Potter (USA) Ltd. (APU)
Press Type: Muller A76
Stamps per Pane: 16
Print Quantity: 26,000,000 stamps
Paper Type: Nonphosphored Type III, Block Tag Applied
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black
Stamp Orientation: Square
Image Area (w x h): 1.0850 x 1.0850 in. / 27.5590 x 27.5590 mm.
Overall Size (w x h): 1.2250 x 1.2250 in. / 31.1150 x 31.1150 mm.
Full Pane Size (w x h): 8.0500 x 5.9300 in. / 204.4700 x 150.6220 mm.
Press Sheets Size (w x h): 24.6500 x 12.1100 in. / 626.1100 x 307.5940 mm.
Plate Size: 192 stamps per revolution
Plate Number: “P” followed by four (4) single digits
Marginal Markings:
Front: ROUTE 66 Road Sign
Back: ROUTE 66 Road Sign • Descriptive Text • Map of United States identifying Route 66 and locations • © 2025 USPS • USPS logo • Two barcodes (488400) • Plate position diagram (6) • Promotional text

Updated April 3^rd:
Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.65″ x 1.33″The Pictorial Postmark measures 2.39″ x 1.24″

Surprisingly, there is no “special” postmark for local post offices to use. Or not yet.

From the Postal Bulletin:

On May 5, 2026, in Phoenix, AZ, the United States Postal Service® will issue the Route 66 stamps (Forever® priced at the First-Class Mail® rate), in eight designs, in a pressure-sensitive adhesive (PSA) pane of 16 stamps (Item 488400). These stamps will go on sale nationwide May 5, 2026, and must not be sold or canceled before the first-day-of-issue. The Route 66 commemorative pane of 16 stamps must not be split and the stamps must not be sold individually.

For a century, drivers have hit the open road chasing the American Dream along Route 66, the legendary highway that originally stretched about 2,400 miles from Chicago to Los Angeles. Established on November 11, 1926, Route 66 forever changed how Americans travel and became a symbol of freedom and adventure. Eight different photographs, featured twice on the stamp pane, show a site from each state that Route 66 runs through. The selvage features a photograph of Route 66 stretching into the distance in Arizona, capturing the sense of possibility the open road inspires. Art director Greg Breeding designed the stamps and stamp pane with existing photographs by David Schwartz.