We don’t have the precinct maps yet, but I found the breakdown of Proposition 1 votes by legislative district on the King County Website. Semi-official illustrator of STB Oranviri generated this map for your viewing pleasure:
Note that the results apply to the King County portions of the districts only; in many cases only a fraction of the district was eligible to vote on the measure.
The results, in tabular form, are below the jump. A big pat on the back to the 36th district (Ballard, Magnolia, Belltown) who supported Prop 1 overwhelmingly, despite those neighborhoods largely not being served by light rail.
District % Yes Neighborhoods/Cities
43rd 80.93 UW, Ravenna, Wallingford, Fremont, Capitol Hill, Downtown Seattle
36th 71.00 Ballard, Magnolia, Belltown
46th 68.76 Laurelhurst, Lake City, Northgate, Greenwood
37th 68.41 Madrona, Rainier Valley, NW Renton
County Aggregate 61.65%
32nd 60.04 Shoreline, Lake Forest Park, Kenmore
34th 59.36 West Seattle/Burien
48th 57.30 Medina, DT Kirkland, Redmond, North Bellevue, East Bellevue
45th 57.28 Woodinville, N. Kirkland, N. Redmond
41st 56.57 South & West Bellevue (incl. DT), Newcastle
1st 55.42 Bothell
5th 53.37 Issaquah, Sammamish
33rd 52.90 Seatac, Kent, Des Moines, Normandy Park
11th 52.87 Sodo, Georgetown, Tukwila, Renton
30th 51.61 Federal Way, Algona, Pacific
47th 48.06 Auburn
31st 46.66 Auburn, Algona
UPDATE: Oran created a new map that edits out the areas not in the ST district. The numbers are the YES percentage, rather than the district number.