Wikipedia:WikiProject U.S. Roads/Washington/List of all state highways before 1970

Numbered

SR 1/PSH 1

• White River-Natches Road (1905-1913); became part of the McClellan Pass Highway
• Pacific Highway (1923-1970)

SR 2/PSH 2

• Newport-Orient Road (1905-1915)
• Sunset Highway (1923-1970)

SR 3/PSH 3

• Chelan-Skagit Road (1905-1915)
• Inland Empire Highway (1923-1970)

SR 4/PSH 4

• Sans Poil-Loomis Road (1905-1923); Tonasket-San Poil Highway (1923-1970)

SR 5/PSH 5

• Cowlitz-Natches Road (1905-1923); National Park Highway System (1923-1937); National Park Highway (1937-1970)

SR 6/PSH 6

• Waterfront Road (1905-1913); became part of the Pacific Highway
• Pend O'Reille Highway (1923-1937); Pend Oreille Highway (1937-1963); Newport Highway (1963-1970)

SR 7/PSH 7

• Snoqualmie Pass Road (1905-1919); became the Sunset Highway
• North Central Highway (1923-1970)

SR 8/PSH 8

• Columbia River Road (1905-1919); became the North Bank Highway
• North Bank Highway (1923-1937); Evergreen Highway (1937-1970)

SR 9/PSH 9

• Montesano-Port Angeles Road (1905-1913); became part of the Olympic Highway
• Olympic Highway (1923-1970)

SR 10/PSH 10

• Wenatchee-Oroville Road (1905-1917); became the Lake Chelan and Okanogan Highway
• Chelan-Okanogan State Highway (1923-1937); Chelan-Okanogan Highway (1937-1970)

SR 11/PSH 11

• Skagit River Road (1905-1917); became the Skagit Highway
• Central Washington Highway (1923-1929); Columbia Basin Highway (1929-1970)

SR 12/PSH 12

• Methow-Barron Road (1905-1919); became part of the Roosevelt Highway
• Ocean Beach Highway (1923-1970)

SR 13/PSH 13

• Cascade Wagon Road (1907-1915); became the Cascade Wagon Road
• Willapa-Grays Harbor Highway (1923-1970)

SR 14/PSH 14

• Hood Canal Road (1909-1913); became part of the Olympic Highway
• Navy Yard Highway (1923-1970)

SR 15/PSH 15

• Lewis River Road (1909-1919)
• Stevens Highway (1931-1970)

SR 16/PSH 16

• Garfield-Asotin Road (1909-1919)
• Methow Valley Highway (1937-1961); North Cross State Highway (1961-1970)

SR 17/PSH 17

• Island-Skagit Road (1909-1919)
• Cascade Wagon Road (1937-1961)

SR 18/PSH 18

• Alder-Kosmos Road (1909-1923); became part of SR 5 National Park Highway System
• No name (1937-1970)

SR 19

• No name (1915-1919); became the Ocean Beach Highway

SR 20

• No name (1915-1923); became SR 13 Willapa-Grays Harbor Highway

SR 21/PSH 21

• No name (1915-1937); Kitsap Peninsula Highway (1937-1970)

SR 22/PSH 22

• No name (1915-1937); Coulee Reservoir Highway (1937-1970)

SR 23

• No name (1915-1917); became the Pend Oreille Highway

Named

This is a list of the highways that only had names between 1913 and 1937.

• Pacific Highway (1913-1923); became SR 1 Pacific Highway
• Sunset Highway (1913-1923); became SR 2 Sunset Highway
• Inland Empire Highway (1913-1923); became SR 3 Inland Empire Highway
  • First Division of the Eastern Route of the Inland Empire Highway (1913-1923); became part of SR 3 Inland Empire Highway
  • Second Division of the Eastern Route of the Inland Empire Highway (1913-1923); Eastern Route of the Inland Empire Highway (1923-1937); became part of PSH 3 Inland Empire Highway
• National Park Highway (1913-1923); became SR 5 National Park Highway System
  • McClellan Pass Highway (1913-1921); Naches Pass Highway (1921-1923); became part of SR 5 National Park Highway System
• Pend Oreille Highway (1917-1923); became SR 6 Pend O'Reille Highway
• North Central Highway (1915-1923); became SR 7 North Central Highway
• North Bank Highway (1919-1923); became SR 8 North Bank Highway
• Olympic Highway (1913-1923); became SR 9 Olympic Highway
• Lake Chelan and Okanogan Highway (1917-1919); Chelan and Okanogan Highway (1919-1923); became SR 10 Chelan-Okanogan State Highway
• Central Washington Highway (1913-1923); became SR 11 Central Washington Highway
• Ocean Beach Highway (1919-1923); became SR 12 Ocean Beach Highway
• Navy Yard Highway (1919-1923); became SR 14 Navy Yard Highway
• Skagit Highway (1917-1919); Roosevelt Highway (1919-1923); Methow Valley Highway (1923-1937); became PSH 16 Methow Valley Highway

Alphanumeric

PSH 1

• SSH 1A (1937-1970)
• SSH 1B (1937-1970)
• SSH 1C (1937-1970)
• SSH 1D (1937-1970)
• SSH 1E (1937-1970)
• SSH 1F (1937-1961, 1967-1970)
• SSH 1G (1937-1970)
• SSH 1H (1937-1970)
• SSH 1I (1937-1970)
• SSH 1J (1937-1970)
• SSH 1K (1937-1970)
• SSH 1L (1937-1970)
• SSH 1M (1937-1970)
• SSH 1N (1937-1943, 1943-1970)
• SSH 1P (1937-1970)
• SSH 1Q (1937-1970)
• SSH 1R (1937-1970)
• SSH 1S (1937-1970)
• SSH 1T (1937-1970)
• SSH 1U (1937-1970)
• SSH 1V (1937-1970)
• SSH 1W (1937-1970)
• SSH 1X (1937-1970)
• SSH 1Y (1945-1970)
• SSH 1Z (1953-1970)

PSH 2

• SSH 2A (1937-1963)
• SSH 2B (1937-1970)
• SSH 2C (1937-1943)
• SSH 2D (1937-1970)
• SSH 2E (1937-1970)
• SSH 2F (1937-1970)
• SSH 2G (1937-1970)
• SSH 2H (1937-1970)
• SSH 2I (1937-1970)
• SSH 2J (1957-1970)
• SSH 2K (1967-1970)
• SSH 2M (1959-1970)

PSH 3

• SSH 3A (1937-1970)
• SSH 3B (1937-1970)
• SSH 3C (1937-1957)
• SSH 3D (1937-1970)
• SSH 3E (1937-1970)
• SSH 3F (1937-1970)
• SSH 3G (1969-1970)
• SSH 3H (1937-1970)
• SSH 3I (1937-1953)
• SSH 3J (1937-1970)
• SSH 3K (1937-1970)
• SSH 3L (1937-1970)
• SSH 3M (1937-1953)
• SSH 3P (1953-1970)
• SSH 3R (1953-1970)
• SSH 3S (1959-1970)
• SSH 3T (1963-1970)
• SSH 3U (1967-1970)
• SSH 3V (1967-1970)

PSH 4

• SSH 4A (1937-1970)
• SSH 4B (1937-1970)
• SSH 4C (1937-1970)

PSH 5

• SSH 5A (1937-1970)
• SSH 5B (1937-1963)
• SSH 5C (1937-1970)
• SSH 5D (1937-1970)
• SSH 5E (1937-1970)
• SSH 5G (1937-1970)
• SSH 5H (1937-1970)
• SSH 5I (1937-1970)
• SSH 5J (1937-1970)
• SSH 5K (1937-1970)
• SSH 5L (1937-1967)
• SSH 5M (1937-1959)
• SSH 5N (1955-1970)

PSH 6

• SSH 6A (1937-1970)
• SSH 6B (1937-1970)

PSH 7

• SSH 7B (1937-1953)
• SSH 7C (1951-1970)
• SSH 7E (1955-1970)

PSH 8

• SSH 8A (1937-1970)
• SSH 8B (1937-1970)
• SSH 8C (1937-1961)
• SSH 8D (1937-1970)
• SSH 8E (1937-1953, 1961-1970)

PSH 9

• SSH 9A (1937-1970)
• SSH 9B (1937-1955)
• SSH 9C (1937-1970)
• SSH 9D (1937-1970)
• SSH 9E (1937-1970)
• SSH 9F (1937-1959)
• SSH 9G (1959-1970)

PSH 10

• SSH 10A (1937-1970)
• SSH 10B (1937-1970)
• SSH 10C (1937-1970)
• SSH 10D (1937-1970)

PSH 11

• SSH 11A (1937-1970)
• SSH 11B (1937-1970)
• SSH 11C (1937-1953, 1961-1970)
• SSH 11D (1953-1970)
• SSH 11E (1937-1970)
• SSH 11F (1937-1970)
• SSH 11G (1951-1970)
• SSH 11H (1961-1970)
• SSH 11I (1967-1970)

PSH 12

• SSH 12A (1937-1970)
• SSH 12B (1937-1970)
• SSH 12C (1937-1970)
• SSH 12D (1937-1970)
• SSH 12E (1937-1970)
• SSH 12F (1943-1970)
• SSH 12G (1959-1970)
• SSH 12H (1957-1970)

PSH 13

• SSH 13A (1937-1970)

PSH 14

• SSH 14A (1937-1970)
• SSH 14B (1937-1955)
• SSH 14C (1937-1939)

PSH 15

• SSH 15A (1937-1970)
• SSH 15B (1937-1970)
• SSH 15C (1937-1970)
• SSH 15D (1937-1970)

PSH 16

• SSH 16A (1967-1970)

PSH 17

• SSH 17A (1937-1961)

PSH 21

• SSH 21A (1937-1970)
• SSH 21B (1937-1970)
• SSH 21C (1957-1970)

PSH 22

• SSH 22A (1937-1970)

Fate of the pre-1923 highways

• SR 6 Waterfront Road (1905-13) → Pacific Highway (1913-23) → SR 1 (1923-37) → PSH 1
• SR 7 Snoqualmie Pass Road (1905-19) → Sunset Highway (1919-23) → SR 2 (1923-37) → PSH 2
• SR 4 Sans Poil-Loomis Road (1905-37) → PSH 4
• SR 1 White River-Natches Road (1905-13) → McClellan Pass Highway (1913-21) → Naches Pass Highway (1921-23) → SR 5 (1923-37) → PSH 5
• SR 5 Cowlitz-Natches Road (1905-23), SR 18 Alder-Kosmos Road (1909-23) → SR 5 (1923-37) → PSH 5
• SR 23 (1915-17) → Pend Oreille Highway (1917-23) → SR 6 (1923-37) → PSH 6
• SR 8 Columbia River Road (1905-37) → PSH 8
• SR 9 Montesano-Port Angeles Road (1905-13), SR 14 Hood Canal Road (1909-13) → Olympic Highway (1913-23) → SR 9 (1923-37) → PSH 9
• SR 10 Wenatchee-Oroville Road (1905-17) → Chelan and Okanogan Highway (1917-23) → SR 10 (1923-37) → PSH 10
• SR 19 (1915-19) → Ocean Beach Highway (1919-23) → SR 12 (1923-37) → PSH 12
• SR 20 (1915-23) → SR 13 (1923-37) → PSH 13
• SR 12 Methow-Barron Road (1905-19) → Roosevelt Highway (1919-23) → Methow Valley Highway (1923-37) → PSH 16
• SR 13 Cascade Wagon Road (1907-15) → Cascade Wagon Road (1915-37) → PSH 17
• SR 21 (1915-37) → PSH 21
• SR 22 (1915-37) → PSH 22

• SR 2 Newport-Orient Road (1905-15) deleted
• SR 3 Chelan-Skagit Road (1905-15) deleted
• SR 11 Skagit River Road (1905-17) → Skagit Highway (1917-19) → Roosevelt Highway (1919-23) deleted when the Roosevelt Highway was truncated as the Methow Valley Highway
• SR 15 Lewis River Road (1909-19) deleted
• SR 16 Garfield-Asotin Road (1909-19) deleted
• SR 17 Island-Skagit Road (1909-19) deleted