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Riddle, Oregon
Grocery store in Riddle
Grocery store in Riddle
Location in Oregon
Location in Oregon
Coordinates: 42°57′6″N 123°21′54″W / 42.95167°N 123.36500°W / 42.95167; -123.36500Coordinates: 42°57′6″N 123°21′54″W / 42.95167°N 123.36500°W / 42.95167; -123.36500
Country United States
State Oregon
County Douglas
Incorporated 1893
Area
 • Total 0.63 sq mi (1.64 km2)
 • Land 0.63 sq mi (1.64 km2)
 • Water 0.00 sq mi (0.00 km2)
Elevation
700 ft (200 m)
Population
 (2010)
 • Total 1,185
 • Estimate 
(2019)
1,221
 • Density 1,935.02/sq mi (746.61/km2)
Time zone UTC−8 (Pacific)
 • Summer (DST) UTC−7 (Pacific)
ZIP code
97469
Area code(s) 541 Exchange: 874
FIPS code 41-61850
GNIS feature ID 1166702

Riddle is a city in Douglas County, Oregon, United States. The population was 1,185 at the 2010 census.

History

Riddle was named for William H. Riddle, a native of Springfield, Illinois, who settled in this area in 1851. By 1881, the Southern Pacific Railroad line south of Roseburg had a station here called "Riddlesburg", which was changed to "Riddles" in 1882 and to "Riddle" in 1889. A post office at this location opened under the name of "Riddles" in 1882 and was changed to "Riddle" in 1910.

Demographics

Historical population
Census Pop.
1900 131
1910 187 42.7%
1920 268 43.3%
1930 195 −27.2%
1940 214 9.7%
1950 634 196.3%
1960 992 56.5%
1970 1,042 5.0%
1980 1,265 21.4%
1990 1,143 −9.6%
2000 1,014 −11.3%
2010 1,185 16.9%
2019 (est.) 1,221 3.0%
U.S. Decennial Census

2010 census

As of the 2010 census, there were 1,185 people, 460 households, and 307 families residing in the city. The population density was 1,881.0 inhabitants per square mile (726.3/km2). There were 491 housing units at an average density of 779.4 per square mile (300.9/km2). The racial makeup of the city was 89.7% White, 0.3% African American, 3.0% Native American, 0.5% Asian, 0.1% Pacific Islander, 1.2% from other races, and 5.2% from two or more races. Hispanic or Latino of any race were 5.1% of the population.

Racial Makeup of Riddle as of 2010 Census
Race Percentage
White 89.7%
African American 0.3%
Native American 3.0%
Asian 0.5%
Pacific Islander 0.1%
Other races 1.2%
Two or more races 5.2%
Hispanic or Latino 5.1%

There were 460 households, of which 36.5% had children under the age of 18 living with them. Married couples living together constituted 44.8%, while 17.0% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 33.3% were non-families. Individuals made up 25.2% of all households, and 8.9% had someone living alone who was 65 years of age or older. The average household size was 2.57 people and the average family size was 3.01.

The median age in the city was 36.6 years. Residents were under the age of 18 made up 25.4% of the population; 9.7% were between the ages of 18 and 24; 25.3% were from 25 to 44; 28.2% were from 45 to 64; and 11.4% were 65 years of age or older. The gender makeup of the city was 48.9% male and 51.1% female.

Geography

Riddle is about 25 miles (40 km) south of Roseburg and 220 miles (350 km) south of Portland. It lies about 4 miles (6.4 km) west of Oregon Route 99 (Interstate 5) at an elevation of about 700 feet (210 m) above sea level. Cow Creek flows by Riddle before entering the nearby South Umpqua River.

According to the United States Census Bureau, the city has a total area of 0.63 square miles (1.63 km2), all of it land.

Climate

Riddle has a warm-summer Mediterranean climate (Csb) according to the Köppen climate classification system. Summers are cool during the mornings but become hot by afternoon, whilst winters are chilly if not severe, and rainy. During hot spells in the summer, there are 28 afternoons reaching over 90 °F or 32.2 °C and three afternoons over 100 °F or 37.8 °C, although only five mornings have ever stayed at or above 68 °F or 20 °C. The hottest afternoon has been 110 °F (43.3 °C) on August 17, 1977, and the hottest morning 72 °F (22.2 °C) on June 28, 2016. The hottest month on record has been July 2015 with a mean of 75.1 °F (23.9 °C), although the hottest mean maximun is 93.6 °F or 34.2 °C in July 1938 and August 1939.

During winter, most days feature westerly surface and aloft winds, although rainfall is restricted by the coastal mountains. On rare occasions, a block in the Gulf of Alaska will drive cold air from the continent west of the Sierra/Cascade crest, producing much colder than normal weather with either snow or clear skies. The coldest month on record has been January 1937 with a mean of 32.7 °F (0.4 °C) and a maximum of 40.0 °F (4.4 °C). The coldest temperature on record has been −3 °F (−19.4 °C) on January 22, 1962.

The wettest “rain year” was from July 1973 to June 1974 with 50.01 inches (1,270.3 mm) and the driest from July 1976 to June 1977 with 16.20 inches (411.5 mm). The wettest day on record has been November 20, 2012 when 4.43 inches (112.5 mm) fell, and the wettest month December 1996 with 16.72 inches (424.7 mm). Snowfall is rare: the mean is 5.2 inches or 0.13 metres; although the most in one month 42.9 inches (1.09 m) in January 1950 and the most on the ground 13 inches or 0.33 metres on January 13, 1930, eighteen seasons have had zero snowfall and four more only a trace.

Climate data for Riddle
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 71
(21.7)
80
(26.7)
86
(30)
94
(34.4)
106
(41.1)
107
(41.7)
108
(42.2)
110
(43.3)
108
(42.2)
102
(38.9)
81
(27.2)
74
(23.3)
110
(43.3)
Average high °F (°C) 49.1
(9.5)
54.5
(12.5)
59
(15)
64.2
(17.89)
70.6
(21.44)
77.2
(25.11)
84.9
(29.39)
85.1
(29.5)
79.6
(26.44)
68.2
(20.11)
55.3
(12.94)
48.6
(9.22)
66.4
(19.11)
Average low °F (°C) 34.4
(1.33)
35.6
(2)
37
(2.8)
39.3
(4.06)
43.6
(6.44)
48.7
(9.28)
52.1
(11.17)
51.3
(10.72)
46.4
(8)
42
(5.6)
39
(3.9)
35.3
(1.83)
42.1
(5.61)
Record low °F (°C) −3
(-19.4)
8
(-13.3)
20
(-6.7)
9
(-12.8)
26
(-3.3)
34
(1.1)
35
(1.7)
36
(2.2)
24
(-4.4)
17
(-8.3)
13
(-10.6)
3
(-16.1)
2
(-16.7)
Precipitation inches (mm) 4.86
(123.4)
3.64
(92.5)
3.18
(80.8)
2.11
(53.6)
1.53
(38.9)
0.95
(24.1)
0.27
(6.9)
0.38
(9.7)
0.88
(22.4)
2.32
(58.9)
4.72
(119.9)
5.54
(140.7)
30.38
(771.7)
Snowfall inches (cm) 2.6
(6.6)
1
(3)
0.5
(1.3)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0.2
(0.5)
0.9
(2.3)
5.2
(13.2)
Avg. precipitation days (≥ 0.01 inch) 16 15 15 13 9 6 2 2 4 9 15 16 122

Economy

Riddle oregon mill
A lumber mill in Riddle, Oregon.

The Riddle area was known for nickel mining, with several square miles of nickel-bearing garnierite surface deposits nearby. The mine closed in 1987.

Education

The Riddle School District provides primary and secondary public education in the city. The district operates Riddle Elementary School and Riddle Junior/Senior High School.

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