This page lists some of the train numbers of Union Pacific passenger trains. This is by no means a complete list, and not all of these numbers were used at the same time. This information came from the book The Union Pacific Streamliners by Harold E. Ranks and William W. Kratville and Journey to Amtrak by Harold A. Edmonson.
| Number | Origin | Destination | Name |
| 1 | Chicago | Portland | Streamliner City of Portland |
| 2 | Portland | Chicago | Streamliner City of Portland |
| 1 | Chicago | Los Angeles | Los Angeles Limited |
| 2 | Los Angeles | Chicago | Los Angeles Limited |
| 3 | Chicago | Los Angeles | Utahn |
| 4 | Los Angeles | Chicago | Utahn |
| 9 | St. Louis | Cheyenne | Streamliner City of St. Louis |
| 10 | Cheyenne | St. Louis | Streamliner City of St. Louis |
| 9 | Kansas City | Cheyenne | Streamliner City of Kansas City |
| 10 | Cheyenne | Kansas City | Streamliner City of Kansas City |
| 17 | Chicago | Portland | Portland Rose |
| 18 | Portland | Chicago | Portland Rose |
| 19 | Spokane | Hinkle | Spokane |
| 20 | Hinkle | Spokane | Spokane |
| 21 | Chicago | San Francisco | Pacific Coast Limited |
| 22 | San Francisco | Chicago | Pacific Coast Limited |
| 23 | Chicago | San Francisco | San Francisco Challenger |
| 24 | San Francisco | Chicago | San Francisco Challenger |
| 27 | Chicago | San Francisco | San Francisco Overland Limited |
| 28 | San Francisco | Chicago | San Francisco Overland Limited |
| 35 | Salt Lake City | Butte | Butte Special |
| 36 | Butte | Salt Lake City | Butte Special |
| 37 | St. Louis | Salt Lake City | Pony Express |
| 38 | Salt Lake City | St. Louis | Pony Express |
| 39 | Kansas City | Salina | |
| 40 | Salina | Kansas City | |
| 48 | San Francisco | Chicago | Forty Niner/Treasure Island Special |
| 49 | Chicago | San Francisco | Forty Niner/Treasure Island Special |
| 79 | Columbus | Spaulding | |
| 80 | Spaulding | Columbus | |
| 81 | Columbus | Albion | |
| 82 | Albion | Columbus | |
| 87 | Chicago | San Francisco | Challenger |
| 88 | San Francisco | Chicago | Challenger |
| 93 | North Platte | South Torrington | Platte Valley Express |
| 94 | South Torrington | North Platte | Platte Valley Express |
| 95 | Kearney | Stapleton | |
| 96 | Stapleton | Kearney | |
| 99 | Kansas City | Salina | Streamliner City of Salina |
| 100 | Salina | Kansas City | Streamliner City of Salina |
| 101 | Chicago | San Francisco | Streamliner City of San Francisco |
| 102 | San Francisco | Chicago | Streamliner City of San Francisco |
| 103 | Chicago | Los Angeles | Streamliner City of Los Angeles |
| 104 | Los Angeles | Chicago | Streamliner City of Los Angeles |
| 105 | Kansas City | Topeka | Streamliner |
| 106 | Topeka | Kansas City | Streamliner |
| 105 | Chicago | Portland | Streamliner City of Portland |
| 106 | Portland | Chicago | Streamliner City of Portland |
| 107 | Chicago | Los Angeles | Challenger |
| 108 | Los Angeles | Chicago | Challenger |
| 111 | Chicago | Denver | Streamliner City of Denver |
| 112 | Denver | Chicago | Streamliner City of Denver |
| 115 | Las Vegas | Los Angeles | Streamliner City of Las Vegas |
| 116 | Los Angeles | Las Vegas | Streamliner City of Las Vegas |
| 401 | Portland | Seattle | |
| 402 | Seattle | Portland | |
| 405 | Portland | Seattle | Streamliner |
| 406 | Seattle | Portland | Streamliner |
| 407 | Portland | Seattle | |
| 408 | Seattle | Portland | |
| 457 | Portland | Seattle | "City of Seattle" |
| 458 | Seattle | Portland | "City of Seattle" |
| 459 | Portland | Seattle | |
| 460 | Seattle | Portland | |
| 557 | Denver | Cheyenne | "City of Cheyenne" |
| 558 | Cheyenne | Denver | "City of Cheyenne" |
| 561 | Portland | Seattle | |
| 562 | Seattle | Portland |
NOTE: The "City of Seattle" and "City of Cheyenne" were not official names for those trains.
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