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O'Brien, Oregon
McCloud River Railroad Caboose.JPG
O'Brien, Oregon is located in Oregon
O'Brien, Oregon
O'Brien, Oregon
Location in Oregon
O'Brien, Oregon is located in the United States
O'Brien, Oregon
O'Brien, Oregon
Location in the United States
Country United States
State Oregon
County Josephine
Area
 • Total 5.24 sq mi (13.56 km2)
 • Land 5.22 sq mi (13.52 km2)
 • Water 0.01 sq mi (0.04 km2)
Elevation
1,415 ft (431 m)
Population
 (2020)
 • Total 470
 • Density 90.02/sq mi (34.75/km2)
Time zone UTC-8 (Pacific (PST))
 • Summer (DST) UTC-7 (PDT)
ZIP code
97534
Area code(s) 458 and 541
FIPS code 41-54350
GNIS feature ID 1147100

O'Brien is a small community in Josephine County, Oregon, in the United States. It's called a "census-designated place" (CDP) because it's a recognized area for gathering population data, even though it doesn't have its own city government.

In 2020, about 470 people lived in O'Brien. The community was named after John O'Brien. He was one of the first people to settle in this area.

Community Life in O'Brien

O'Brien has a few important places for its residents. These businesses are mostly found where Redwood Highway and Lone Mountain Road meet.

You can find Mann's O'Brien Country Store and Discount Gas there. There is also a post office, which uses the ZIP code 97534. The community has a fire station to help keep everyone safe. For food, there's McGrew's restaurant. If you're visiting, the Lone Mountain RV Park offers a place to stay.

South of these main spots, closer to the California border, is the Almost Heaven Member's Resort. O'Brien is the southernmost community in Josephine County.

Where is O'Brien Located?

O'Brien is in the southwestern part of Josephine County. It sits in the valley of the West Fork of the Illinois River. This river flows north and eventually joins the Rogue River.

U.S. Route 199 goes right through O'Brien. If you drive north on this road, you'll reach Cave Junction in about 7 miles. Go further north (about 36 miles total), and you'll get to Grants Pass. If you head south on Route 199, you'll cross into California in about 5 miles. From there, it's about 45 miles to Crescent City, California.

The total area of O'Brien is about 5.24 square miles (13.54 square kilometers). Most of this area is land, with only a tiny bit (about 0.01 square miles or 0.04 square kilometers) being water.

O'Brien's Population Changes

Historical population
Census Pop.
2020 470
U.S. Decennial Census

The population of O'Brien has changed over the years. In 2010, there were 504 people living there. By 2020, the population was 470. This information comes from the official U.S. Census.

Weather in O'Brien

O'Brien has a Mediterranean climate. This means it has hot and dry summers, and cool and wet winters. It's also considered subtropical because of its very hot summer days. Temperatures often go above 95°F (35°C) in the summer. Even though the summer days are hot, the nights are much cooler.

Climate data for O'Brien, Oregon
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 66
(19)
76
(24)
82
(28)
92
(33)
99
(37)
109
(43)
112
(44)
110
(43)
110
(43)
100
(38)
78
(26)
69
(21)
112
(44)
Mean daily maximum °F (°C) 51
(11)
57
(14)
62
(17)
68
(20)
77
(25)
85
(29)
94
(34)
94
(34)
88
(31)
74
(23)
57
(14)
50
(10)
71
(22)
Mean daily minimum °F (°C) 33
(1)
34
(1)
35
(2)
37
(3)
42
(6)
47
(8)
52
(11)
50
(10)
45
(7)
39
(4)
37
(3)
33
(1)
40
(4)
Record low °F (°C) 11
(−12)
4
(−16)
20
(−7)
21
(−6)
27
(−3)
28
(−2)
36
(2)
34
(1)
25
(−4)
15
(−9)
11
(−12)
−6
(−21)
−6
(−21)
Average precipitation inches (mm) 10.77
(274)
9.34
(237)
7.86
(200)
4.28
(109)
2.42
(61)
0.94
(24)
0.28
(7.1)
0.39
(9.9)
0.80
(20)
3.53
(90)
9.59
(244)
13.00
(330)
63.20
(1,605)
Average snowfall inches (cm) 4.1
(10)
2.5
(6.4)
1.4
(3.6)
0.8
(2.0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0.4
(1.0)
2.5
(6.4)
11.7
(30)

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