Mount Sylvania

{{Short description|Extinct volcano near Portland, Oregon, United States}}

{{Use mdy dates|date=January 2025}}

{{Infobox mountain

| name = Mount Sylvania

| photo = Mount Sylvania in Portland Oregon.JPG

| photo_caption = Top as seen from Tualatin

| elevation_ft = 978

| elevation_ref = {{NAVD88}}{{cite ngs |id=RD2538 |designation=Sylvania Reset |accessdate=2008-11-17}}

| prominence = {{convert|510|ft|0|abbr=on}}

| prominence_ref = {{cite peakbagger |pid=32965 |name=Mount Sylvania, Oregon |accessdate=2016-04-27}}

| location = Multnomah County, Oregon, U.S.

| range = Tualatin Mountains

| coordinates = {{coord|45.438174217|N|122.72164825|W|type:mountain_region:US-OR_scale:100000_source:NGS|format=dms|display=inline,title}}

| coordinates_ref =

| etymology = Derived from Silvanus, a Roman tutelary deity{{cite book |title=Oregon Geographic Names |first=Lewis A. |last=McArthur |date=2003 |isbn=0-87595-277-1 |edition=7th |page= |publication-place=Portland, Oregon}}

| topo = USGS Lake Oswego

| type = Shield volcano

{{cite web

| url = http://vulcan.wr.usgs.gov/Volcanoes/Oregon/BoringLavaField/description_boring_lava.html

| title = The Boring Lava Field, Portland, Oregon

| publisher = USGS: Cascades Volcano Observatory

| archiveurl = https://web.archive.org/web/20110701101745/http://vulcan.wr.usgs.gov/Volcanoes/Oregon/BoringLavaField/description_boring_lava.html

| archivedate = 2011-07-01

| accessdate = 2008-04-01 }}

| age =

| volcanic_field = Boring Lava Field

| first_ascent =

| easiest_route =

}}

Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. Parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard.

The Sylvania campus of Portland Community College is located on the mountain's western slopes.