U.S. Highway 14 (US 14) in the U.S. state of Wyoming runs east to west across the northern part of the state. The road connects South Dakota on the east with Yellowstone National Park on the west. It is mostly a two-lane surface road except for several sections that it shares with Interstate 90 (I-90).

While the official western terminus of the road is at the Eastern gate of Yellowstone National Park, some commercially produced maps show US 14 within the park itself starting at a junction with US 89 and US 287 at West Thumb and following the northern shore of Yellowstone Lake. From the park US 14 is cosigned with US 16 and US 20. The roads lead east out of the Absaroka Range and down the Shoshone River valley to Cody. Here, US 14A splits north toward Powell, while US 14/US 16/US 20 continues east across the Bighorn Basin to Greybull. At Greybull, US 16 and US 20 go south, while US 14 travels east to Shell, and the western slope of the Bighorn Mountains. The road ascends a windy path through steep Shell Canyon and rejoins US 14A at the top of the range at Burgess Junction. The road is designated as Bighorn Scenic Byway between Shell and Dayton on the eastern side of the mountain range. On the east side of the Bighorn Mountains, the road merges with I-90 and travels southeast to Sheridan. From Sheridan, the road continues east, rejoining with US 16 near Clearmont. The roads travel across the Powder River Country to Gillette where it joins again with I-90 to Moorcroft. From here, it diverges north from I-90 briefly to junction with Wyoming Highway 24 (WYO 24) with access to Devils Tower National Monument. US 14 turns south and rejoins I-90 which it follows to the eastern border of Wyoming and South Dakota.

US 14 was originally planned to stop in Wall, South Dakota. In 1936, the road was extended to the Wyoming border and US 16 was rerouted through Newcastle and the old US 16 was redesignated as US 14. Prior to 1940, US 14 followed the route currently serviced by US 14A through Lovell and Powell. In 1940, the highway took over WYO 520 between Burgess Junction and Greybull, and the old road was renamed WYO 14. Due to confusion, it was recommissioned as US 14A in 1965. In the 1960s, portions of the highway in the eastern part of the state became I-90.

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County	Location	mi	km	Destinations	Notes
Yellowstone National Park		0.00	0.00	Yellowstone National Park East Entrance	National western terminus of US 14 and US 16; western end of US 16 and US 20 overlaps; US 20 resumes in Montana at the park's west entrance
Park	Cody	49.38	79.47	WYO 291 (South Fork Road)
		51.96	83.62	US 14A east (16th Street) / WYO 120 west (Chief Joseph Scenic Highway) – Powell, Big Horn Natl Rec Area	Western end of WYO 120 overlap
		54.18	87.19	WYO 120 south – Meeteetse, Thermopolis	Eastern end of WYO 120 overlap
Big Horn	​	85.12	136.99	WYO 30 – Burlington
	Emblem	85.72	137.95	WYO 32 – Powell, Lovell
	​	100.11	161.11	US 310 west / WYO 789 north – Lovell, Billings, Bighorn Canyon Natl Recreation Area	Western end of WYO 789 overlap
	Greybull	105.09	169.13	US 16 east / US 20 east / WYO 789 south – Basin, Worland	Eastern end of US 16, US 20, and WYO 789 overlaps
Sheridan	​	152.49	245.41	US 14A west (Medicine Wheel Passage) – Lovell, Yellowstone, Teton
	Dayton	179.30	288.56	WYO 343
	Ranchester	185.14	297.95	WYO 345 – Parkman
		185.49	298.52	I-90 west / US 87 north – Billings	Western end of I-90 and US 87 overlaps
	​	191.80	308.67	WYO 345 – Acme
	​	193.52	311.44	WYO 339 – Decker, Mont.
	Sheridan	198.10	318.81	I-90 BL east (Main Street) / WYO 338 (Decker Road)
		200.33	322.40	WYO 330 (Fifth Street)
		202.48	325.86	I-90 east / I-90 BL west / US 87 south – Sheridan, Big Horn	Eastern end of I-90 and US 87 overlaps
	​	229.92	370.02	US 16 west – Buffalo	Western end of US 16 overlap
	​	256.88	413.41	WYO 341 – Arvada
Campbell	​	304.38	489.85	WYO 59 north – Broadus	Western end of WYO 59 overlap
	Gillette	308.17	495.95	WYO 50 to I-90 (I-90 BL) – Buffalo, Moorcroft
		309.19	497.59	WYO 59 south to I-90 – Douglas	Eastern end of WYO 59 overlap
		310.51	499.72	I-90 west / I-90 BL ends / WYO 51 – Buffalo	Western end of I-90 overlap
		311.52	501.34	Garner Lake Road
	​	315.41	507.60	Wyodak Road
	​	323.73	520.99	Rozet
Crook	Moorcroft	335.90	540.58	I-90 east / I-90 BL ends – Sundance	Eastern end of I-90 overlap; western end of BL 90 overlap
		336.04	540.80	WYO 51 west
		337.10	542.51	I-90 BL east / US 16 east to I-90 – Upton, Newcastle	Eastern end of BL 90 and US 16 overlaps
	​	342.09	550.54	WYO 113 – Pine Haven
	​	362.66	583.64	WYO 24 east – Devils Tower, Hulett
	Sundance	382.01	614.79	I-90 / I-90 BL begins – Moorcroft, Spearfish	Western end of BL 90 overlap
		382.21	615.11	WYO 116 west – Upton
		383.67	617.46	WYO 585 south – Newcastle
		385.43	620.29	I-90 west / I-90 BL ends – Moorcroft	Eastern end of BL 90 overlap; western end of I-90 overlap
	​	388.35	624.99	Moskee Road
	​	395.74	636.88	WYO 111 – Aladdin
	Beulah	402.33	647.49	Beulah
	​	403.57	649.48	I-90 east / US 14 east – Spearfish, Sturgis, Rapid City	Continuation into South Dakota
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

U.S. Highway 14A
Location	Cody–Burgess Junction
Length	103.01 mi (165.78 km)
Existed	1936–present

U.S. Highway 14A (US 14A) is an alternate route for US 14 between Cody and Burgess Junction. At its west end in Cody, US 14 is concurrent with US 16 and US 20. West of Burgess Junction, US 14A passes through the Bighorn Mountains, reaching a maximum elevation of 9,430 feet (2,870 m). This portion of the road is closed during the winter months. The total length of US 14A is approximately 106 miles (171 km). Intermediate towns on the highway include Powell and Lovell. At Lovell, US 14A is concurrent with US 310 for approximately three miles (4.8 km).

In the initial 1925 plan, roughly the west half of present US 14A, from Cody to US 310 in Deaver, was assigned the number U.S. Highway 220 (US 220). However, two spurs of US 20 were added in Pennsylvania, and so US 220 became U.S. Highway 420 (US 420) in the final 1926 plan.

Around 1933, US 116 was extended west from Sheridan to Deaver, then absorbing US 420 to end at Cody. Soon after, it became part of an extended US 14. US 14 was shifted south to its present alignment in 1940, and the old alignment became WYO 14 for a while and was recommissioned as US 14A around 1965.

U.S. Route 14
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