| Name | Opened | Closed | Notes |
| On 29 JAN 1958 the last four lines dieselized but reinstated 25 FEB 1958. The Macks were retired in the early 1950s. The last day of service was probably on the Friday or Saturday preceding listed date below. All routes were operated in diesel mode on Sundays as of 25 JUN 1950. On 15 NOV 1952 this was extended to include Saturdays. The norm for the start up of new or revised services was on a Monday. Hence the last day of trolley service would have been a Friday or or less likely a Saturday for the first conversions. It is not known whether there had been any intermittent use of trolleys on Saturdays or Sundays after the above listed dates. | |||
| Eastmoreland | 30 AUG 1936 | 2 JAN 1957 | 12 JUN 1955 line dieselized, reconverted on 29 OCT 1956. |
| Foster | 27 SEP 1937 | 12 JUN 1955 | |
| Hawthorne | 27 SEP 1937 | 12 JUN 1955 | |
| Interstate | 5 MAY 1940 | 23 OCT 1958 | |
| Mississippi | 5 NOV 1949 | 23 OCT 1958 | |
| Sandy | 30 NOV 1936 | 23 OCT 1958 | 12 JUN 1955 line dieselized, reconverted 29 SEP 1957. |
| Sellwood | 24 MAR 1940 | 2 JAN 1957 | 12 JUN 1955 line dieselized, reconverted 29 OCT 1956. |
| St. John's | 11 APR 1937 | 23 OCT 1958 | |
| Third | 23 MAY 1937 | 9 AUG 1953 | Serving northwest and south Portland, this was the only line not to terminate in downtown Portland. |
| Williams | 21 FEB 1937 | 17 FEB 1952 | This was the first route to go when the bus line was moved to an adjacent street. |
Note: Portland's electric trolleybus routes did not have numbers. The source for most of the above information is The Trolley Coach in North America and a few notes from Steve Morgan.
This page last updated 10 MY 2009
