ORS § 201.100
The southern boundary of Douglas County is as follows: Beginning at the southeast corner of Coos County, which point is the east quarter corner of section 13 of township 32 south, range 10 west of the Willamette Meridian; thence due south to a point on the summit of the ridge dividing the waters of the Rogue River from the Umpqua River, which point is the southwest corner of Douglas County; thence east along the ridge to the divide forming the eastern tributaries of John Mule Creek; thence south to the southwest corner of section 36, township 32 south, range 9 west; thence east one mile; north one mile; east one-half mile; south one-fourth mile; east one-half mile; south three-fourths mile; east five miles to the range line between townships 7 and 8 west; thence south one-half mile; east one-half mile; north one-fourth mile; east one-fourth mile; south three-fourths mile; east one-fourth mile; south one-half mile; east one mile; south one-half mile; east two and one-half miles; south one-half mile; east one and one-half miles; south one-fourth mile; east one-half mile; north one-fourth mile; east one-half mile; north one-half mile; east one mile; north one-fourth mile; east one mile; south one-fourth mile; east one-fourth mile; north one mile; east one and one-half miles; north one mile; east one-fourth mile; south one-half mile; east two miles; south one-fourth mile; east one mile; north one-fourth mile; east one and three-quarters miles; south one-half mile; east one and one-fourth miles; south one and one-half miles; east one mile to the east quarter corner of section 13, township 33 south, range 5 west; thence north one-half mile to the southwest corner of section 7, township 33 south, range 4 west of the Willamette Meridian; thence east one mile to the southeast corner of section 7; thence north one-half mile to the east one-quarter corner of section 7; thence east one-half mile to the center of section 8 of such township and range; thence north one-half mile to the north one-quarter corner of section 8; thence east one-half mile to the northeast corner of section 8; thence north one-half mile to the west one-quarter corner of section 4 of such township and range; thence east one-half mile to the center of section four; thence north one-half mile to the north one-quarter corner of section four; thence east one and one-half miles to the southeast corner of section 34, township 32 south, of range 4 west of the Willamette Meridian; thence north to the northeast corner of section 34; thence east seven miles to the southeast corner of section 26, township 32 south, of range 3 west of the Willamette Meridian; thence north one-half mile to the east one-quarter corner of section 26; thence east two miles to the east one-quarter corner of section 30, township 32 south, of range 2 west of the Willamette Meridian; thence north one-half mile to the northeast corner of section 30; thence east one mile to the southeast corner of section 20 in the last-mentioned township and range; thence north one-half mile to the east one-quarter corner of section 20; thence east five miles to the east one-quarter corner of section 19, township 32 south, of range 1 west of the Willamette Meridian; thence north one-half mile to the northeast corner of section 19; thence east three miles to the southeast corner of section 15 in the last-mentioned township and range; thence north one mile to the northeast corner of section 15; thence east one-half mile to the south one-quarter corner of section 11 of the last-mentioned township and range; thence north one mile to the north quarter corner of section 11; thence east one-half mile to the southeast corner of section 2 of the last-mentioned township and range; thence north to the northeast corner of section 2; thence east to the southeast corner of section 31, township 31 south, range 1 east; thence north one mile to northwest corner section 32; thence east one mile to northeast corner section 32; thence north one mile to northwest corner section 28; thence east one mile to northeast corner section 28; thence north one mile to northwest corner section 22; thence east one mile to northeast corner section 22; thence north one mile to northwest corner section 14; thence east two miles to northeast corner section 13; all in township 31 south, range 1 east; thence north one mile to northwest corner section 7; thence east two miles to northeast corner section 8; thence north one mile to northwest corner section 4; thence east one mile to northeast corner section 4, township 31 south, range 2 east; thence north one mile to northwest corner section 34; thence east one mile to northeast corner section 34; thence north one mile to northwest corner section 26, township 30, range 2 east; thence east five miles to southwest corner of section 22; thence north one mile to northwest corner section 22; thence east one mile to northeast corner section 22; thence north one mile to northwest corner section 14; thence east one mile to northeast corner section 14; thence north one mile to northwest corner section 12, township 30 south, range 3 east; thence east one mile to southwest corner section 6; thence north one mile to northwest corner section 6; thence east on township line between townships 29 and 30 south, to the range line between ranges 4 and 5 east; thence north along such range line to parallel 43 degrees, 4 minutes north latitude, the same being the northern boundary of Crater Lake National Park; thence east along such parallel, approximately ten and one-half miles to the summit of the Cascade Range.
ORS 201.100
In addition to the boundary described in 201.100, the western boundary of Douglas County is in part the eastern boundary of Coos County (see 201.060) and in part the Pacific Ocean. The northern boundary of Douglas County is the southern boundary of Lane County (see 201.200). The western boundary of Douglas County is the summit of the Cascade Range adjacent to a part of the western boundary of Klamath County (see 201.180).