# Lake County, California

Lake County is a county located in the north central portion of the U.S. state of California. As of the 2020 census, the population was 68,163. The county seat is Lakeport. The county takes its name from Clear Lake, the dominant geographic feature in the county and the largest non-extinct natural lake wholly within California. (Lake Tahoe is partially in Nevada; the Salton Sea was formed by flooding; Tulare Lake was drained by the agricultural industry.)
Lake County forms the Clearlake, California micropolitan statistical area. It is directly north of the San Francisco Bay Area.
Lake County is part of California's Wine Country, which also includes Napa, Sonoma, and Mendocino counties. It includes nine American Viticultural Areas and around 20 bonded wineries.

## History

Lake County has been inhabited by Pomo Native Americans for over ten thousand years. Pomos had been fishermen and hunters, known especially for their intricate basketry made from lakeshore tules and other native plants and feathers. Pomo people continue to live in Lake County.
The area had European American settlers since at least the 1840s. Lake County was created in 1861 from parts of Napa and Mendocino counties. The eastern boundary of Lake County, which was not clearly specified in the 1861 act, was clarified by legislative acts passed in 1864 and 1868. A major effect of the 1868 act was to include in Lake County the entire watershed of North Fork Cache Creek, which had previously been claimed by Colusa County.
The 1911 California Blue Book lists the major crops as Bartlett pears and beans. Other crops include grain, alfalfa, hay, prunes, peaches, apples, grapes and walnuts. Stockraising included goats, hogs, turkeys and dairying.
Some vineyards were planted in the 1870s by European Americans, but the first in the state were established in the 18th century by Spanish missionaries. By the early 20th century, the area was earning a reputation for producing some of the world's greatest wines. However, in 1920, national prohibition essentially ended Lake County's wine production. With authorized cultivation limited to sacramental purposes, most of the vineyards were ripped out and replanted with walnut and pear orchards.

## Geography

According to the U.S. Census Bureau, the county has a total area of 1,329 square miles (3,440 km$^2$), of which 1,256 square miles (3,250 km$^2$) is land and 73 square miles (190 km$^2$), or 5.5%, is water. Two main watercourses drain the county: Cache Creek, which is the outlet of Clear Lake; and Putah Creek. Both of these flow to the Sacramento River. The main streams which flow into Clear Lake are Forbes Creek, Scotts Creek, Middle Creek, and Kelsey Creek. At the extreme north of the county Lake Pillsbury and the Van Arsdale Reservoir dam the Eel River, providing water and power to Ukiah in Mendocino County.
Clear Lake is believed to be the oldest warmwater lake in North America, due to a geological fluke. The lake sits on a huge block of stone which slowly tilts in the northern direction at the same rate as the lake fills in with sediment, thus keeping the water at roughly the same depth. The geology of the county is chaotic, being based on Franciscan Assemblage hills. Numerous small faults are present in the south end of the lake as well as many old volcanoes, the largest being Cobb Mountain. The geologic history of the county shows events of great violence, such as the eruption of Mount Konocti and Mount St. Helena and the collapse of Cow Mountain, which created the hills around the county seat of Lakeport. Blue Lakes, Lake Pillsbury, and Indian Valley Reservoir are the county's other major bodies of water.
Lake County has habitats for a variety of species of concern including the uncommon herb, Legenere limosa, the rare Eryngium constancei, and the tule elk. Waterfowl, bear, and other wildlife abound in the Clear Lake basin.
Due to its surrounding hilly terrain, Lake County is the only one of California's 58 counties never to have been served by a railroad line.

### Adjacent counties

* Glenn County - northeast
* Colusa County - east
* Yolo County - southeast
* Napa County - southeast
* Sonoma County - southwest
* Mendocino County - west

### National protected areas

* Mendocino National Forest (part)
* Cow Mountain Recreation Area
* Cache Creek Wilderness and Cache Creek Wildlife Area
In 2015, President Barack Obama created the Berryessa Snow Mountain National Monument, incorporating these and other areas.

### State protected areas

* Boggs Mountain Demonstration State Forest
* Anderson Marsh State Historic Park
* Loch Lomond Vernal Pool Ecological Reserve
* Boggs Lake Ecological Reserve
* Clear Lake State Park
* Rodman Slough Preserve

### Mineral springs

In the late 19th century, the worldwide popularity of mineral water for the relief of myriad physical ailments resulted in the development of mineral resorts around Clear Lake.
* Greene Bartlett discovered Bartlett hot springs in 1870. The springs were developed into a resort and by 1900 included a mineral water bottling plant. The resort burned down in 1934.
* Harbin Hot Springs was developed by settlers in the 1860s and burned to the ground in the Valley Fire of 2015. The resort partially reopened in January 2019, including the main pools and sauna, and a limited cafeteria service.
* Highland Springs opened in 1891 and was destroyed by fire in 1945. During its time, Highland had an elegant dining room and a spacious hotel.
* Saratoga Springs Resort was opened by J. J. Liebert in 1873 with several cabins, and within two decades had room for 350 guests.
* Witter Springs Resort opened in 1873 with a hotel and guest cottages.

## Climate

Lake County has a Mediterranean climate with hot summer daytime temperatures in its lower elevations. Nighttime temperatures remain cool year-round, somewhat moderating average temperatures and relieving the summer heat.
Climate data for Clearlake, California (1981–2010 normals) :
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 76 (24) | 81 (27) | 84 (29) | 94 (34) | 101 (38) | 114 (46) | 113 (45) | 112 (44) | 111 (44) | 104 (40) | 92 (33) | 78 (26) | 114 (46) |
| Mean daily maximum °F (°C) | 55 (13) | 58 (14) | 62 (17) | 67 (19) | 75 (24) | 84 (29) | 92 (33) | 90 (32) | 85 (29) | 75 (24) | 62 (17) | 55 (13) | 72 (22) |
| Mean daily minimum °F (°C) | 32 (0) | 34 (1) | 36 (2) | 39 (4) | 45 (7) | 51 (11) | 55 (13) | 53 (12) | 49 (9) | 42 (6) | 35 (2) | 32 (0) | 42 (6) |
| Record low °F (°C) | 8 (−13) | 16 (−9) | 17 (−8) | 23 (−5) | 28 (−2) | 34 (1) | 39 (4) | 40 (4) | 30 (−1) | 21 (−6) | 19 (−7) | 6 (−14) | 6 (−14) |
| Average precipitation inches (mm) | 6.45 (164) | 5.91 (150) | 4.53 (115) | 1.73 (44) | 1.13 (29) | .22 (5.6) | .02 (0.51) | .10 (2.5) | .43 (11) | 1.44 (37) | 3.51 (89) | 5.95 (151) | 31.42 (798.61) |
| Source: ||||||||||||||

### Air quality

Lake County has been ranked by the American Lung Association as having the cleanest air in the nation, including in 2013, 2014 and 2015. Lake County has also been ranked 24 times as having the cleanest air in California. Currently, the American Lung Association's website gives Lake County air a "C" grade for high ozone days and an "A" grade for particle pollution.

## Demographics
### 2020 census

Lake County, California – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race. :
| Race / Ethnicity (NH = Non-Hispanic) | Pop 2000 | Pop 2010 | Pop 2020 | % 2000 | % 2010 | % 2020 |
| White alone (NH) | 46,933 | 47,938 | 44,202 | 80.49% | 74.13% | 64.85% |
| Black or African American alone (NH) | 1,209 | 1,186 | 1,158 | 2.07% | 1.83% | 1.70% |
| Native American or Alaska Native alone (NH) | 1,413 | 1,530 | 1,737 | 2.42% | 2.37% | 2.55% |
| Asian alone (NH) | 468 | 695 | 940 | 0.80% | 1.07% | 1.38% |
| Pacific Islander alone (NH) | 82 | 97 | 89 | 0.14% | 0.15% | 0.13% |
| Other Race alone (NH) | 52 | 107 | 386 | 0.09% | 0.17% | 0.57% |
| Mixed Race or Multi-Racial (NH) | 1,513 | 2,024 | 4,209 | 2.59% | 3.13% | 6.17% |
| Hispanic or Latino (any race) | 6,639 | 11,088 | 15,442 | 11.39% | 17.15% | 22.65% |
| Total | 58,309 | 64,665 | 68,163 | 100.00% | 100.00% | 100.00% |

### 2011

Population, race, and income :
| Total population | 64,392 | 64,392 |
| White | 54,450 | 84.6% |
| Black or African American | 1,440 | 2.2% |
| American Indian or Alaska Native | 2,031 | 3.2% |
| Asian | 727 | 1.1% |
| Native Hawaiian or other Pacific Islander | 154 | 0.2% |
| Some other race | 3,435 | 5.3% |
| Two or more races | 2,155 | 3.3% |
| Hispanic or Latino (of any race) | 10,784 | 16.7% |
| Per capita income | $22,238 | $22,238 |
| Median household income | $39,525 | $39,525 |
| Median family income | $50,278 | $50,278 |

#### Places by population, race, and income

Places by population and race :
| Place | Type | Population | White | Other | Asian | Black or African American | Native American | Hispanic or Latino (of any race) |
| Clearlake | City | 15,134 | 76.9% | 14.2% | 1.0% | 5.4% | 2.5% | 23.9% |
| Clearlake Oaks | CDP | 1,291 | 85.8% | 2.8% | 0.0% | 5.0% | 6.4% | 0.8% |
| Clearlake Riviera | CDP | 2,850 | 96.3% | 0.8% | 0.0% | 2.2% | 0.7% | 12.7% |
| Cobb | CDP | 1,810 | 92.6% | 3.6% | 3.8% | 0.0% | 0.0% | 5.2% |
| Hidden Valley Lake | CDP | 6,243 | 87.2% | 9.4% | 1.4% | 0.0% | 2.0% | 17.1% |
| Kelseyville | CDP | 2,923 | 65.8% | 26.5% | 0.0% | 0.3% | 7.4% | 33.3% |
| Lakeport | City | 4,799 | 86.2% | 10.9% | 0.8% | 1.2% | 0.9% | 9.1% |
| Lower Lake | CDP | 1,308 | 71.9% | 11.7% | 0.5% | 0.0% | 15.9% | 13.3% |
| Lucerne | CDP | 2,493 | 76.1% | 2.4% | 0.5% | 5.3% | 15.6% | 4.6% |
| Middletown | CDP | 1,848 | 78.3% | 15.5% | 0.0% | 4.2% | 1.9% | 41.0% |
| Nice | CDP | 2,289 | 95.3% | 3.4% | 0.0% | 1.1% | 0.2% | 10.2% |
| North Lakeport | CDP | 3,514 | 89.8% | 6.4% | 2.0% | 0.6% | 1.1% | 21.7% |
| Soda Bay | CDP | 874 | 94.6% | 4.3% | 0.0% | 1.0% | 0.0% | 17.0% |
| Spring Valley | CDP | 1,120 | 97.1% | 1.0% | 0.0% | 1.9% | 0.0% | 4.6% |
| Upper Lake | CDP | 939 | 80.1% | 15.0% | 1.2% | 0.0% | 3.7% | 25.2% |
Places by population and income :
| Place | Type | Population | Per capita income | Median household income | Median family income |
| Clearlake | City | 15,134 | $16,050 | $28,604 | $31,736 |
| Clearlake Oaks | CDP | 1,291 | $25,110 | $29,962 | $40,393 |
| Clearlake Riviera | CDP | 2,850 | $27,036 | $49,236 | $70,394 |
| Cobb | CDP | 1,810 | $28,876 | $71,544 | $90,608 |
| Hidden Valley Lake | CDP | 6,243 | $26,056 | $59,081 | $63,382 |
| Kelseyville | CDP | 2,923 | $17,607 | $41,461 | $46,324 |
| Lakeport | City | 4,799 | $28,301 | $45,302 | $61,450 |
| Lower Lake | CDP | 1,308 | $17,018 | $35,809 | $49,022 |
| Lucerne | CDP | 2,493 | $16,659 | $26,710 | $52,125 |
| Middletown | CDP | 1,848 | $16,261 | $42,159 | $43,125 |
| Nice | CDP | 2,289 | $18,303 | $29,167 | $34,701 |
| North Lakeport | CDP | 3,514 | $24,118 | $37,986 | $51,474 |
| Soda Bay | CDP | 874 | $26,170 | $55,096 | $61,083 |
| Spring Valley | CDP | 1,120 | $19,491 | $60,370 | $60,532 |
| Upper Lake | CDP | 939 | $14,312 | $28,255 | $29,792 |

### 2010 Census

The 2010 United States census reported that Lake County had a population of 64,665. The racial makeup of Lake County was 52,033 (80.5%) White, 1,232 (1.9%) African American, 2,049 (3.2%) Native American, 724 (1.1%) Asian, 108 (0.2%) Pacific Islander, 5,455 (8.4%) from other races, and 3,064 (4.7%) from two or more races. Hispanic or Latino of any race were 11,088 persons (17.1%).
Population reported at 2010 United States Census :
| The County | Total Population | White | African American | Native American | Asian | Pacific Islander | other races | two or more races | Hispanic or Latino (of any race) |
| Lake County | 64,665 | 52,033 | 1,232 | 2,049 | 724 | 108 | 5,455 | 3,064 | 11,088 |
| Incorporated city | Total Population | White | African American | Native American | Asian | Pacific Islander | other races | two or more races | Hispanic or Latino (of any race) |
| Clearlake | 15,250 | 11,262 | 614 | 400 | 161 | 27 | 1,805 | 981 | 3,248 |
| Lakeport | 4,753 | 3,932 | 46 | 147 | 99 | 5 | 337 | 187 | 799 |
| Census-designated place | Total Population | White | African American | Native American | Asian | Pacific Islander | other races | two or more races | Hispanic or Latino (of any race) |
| Clearlake Oaks | 2,359 | 2,054 | 54 | 45 | 34 | 1 | 60 | 111 | 192 |
| Clearlake Riviera | 3,090 | 2,641 | 36 | 75 | 40 | 5 | 167 | 126 | 424 |
| Cobb | 1,778 | 1,625 | 14 | 31 | 13 | 1 | 26 | 68 | 113 |
| Hidden Valley Lake | 5,579 | 4,830 | 63 | 80 | 75 | 12 | 326 | 193 | 733 |
| Kelseyville | 3,353 | 2,213 | 22 | 51 | 32 | 2 | 888 | 145 | 1,337 |
| Lower Lake | 1,294 | 1,031 | 20 | 18 | 13 | 1 | 125 | 86 | 219 |
| Lucerne | 3,067 | 2,581 | 60 | 105 | 26 | 9 | 94 | 192 | 367 |
| Middletown | 1,323 | 985 | 5 | 28 | 18 | 0 | 225 | 62 | 413 |
| Nice | 2,731 | 2,187 | 65 | 159 | 42 | 7 | 123 | 148 | 384 |
| North Lakeport | 3,314 | 2,685 | 28 | 126 | 40 | 4 | 271 | 160 | 571 |
| Soda Bay | 1,016 | 843 | 16 | 14 | 12 | 0 | 102 | 29 | 171 |
| Spring Valley | 845 | 766 | 15 | 10 | 6 | 3 | 24 | 21 | 71 |
| Upper Lake | 1,052 | 842 | 7 | 33 | 7 | 0 | 104 | 59 | 242 |
| Other unincorporated areas | Total Population | White | African American | Native American | Asian | Pacific Islander | other races | two or more races | Hispanic or Latino (of any race) |
| All others not CDPs (combined) | 13,861 | 11,556 | 167 | 727 | 106 | 31 | 778 | 496 | 1,804 |

### 2005

There were a total of 34,031 homes in Lake County in 2005. This county has gone through a growth in housing units, adding a sum of 1,414 residential structures since 2001, a change of 4.3 percent. Lake County ranks 978 of 3,141, compared to change in residential structure growth in counties throughout the Unities States.
Lake County had a median home value in the year 2005 of $255,300, according to the American Community Survey. This median is less than the overall California 2005 home median value of $477,700 and greater than median home value of $167,500 for the rest of the nation in that year. In 2005, the American Community Survey reported that 14.4% of Lake County's owner-occupied dwellings are valued over a half a million dollars.
In the county, the population was spread out, with 24.1% under the age of 18, 6.0% from 18 to 24, 23.6% from 25 to 44, 26.8% from 45 to 64, and 19.5% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 97.6 males. For every 100 females age 18 and over, there were 94.7 males.
The median income for a household in the county was $49,627, and the median income for a family was $55,818. Males had a median income of $45,771 versus $44,026 for females. The per capita income for the county was $43,825. About 6.9% of families and 4.6% of the population were below the poverty line, including 22.8% of those under age 18 and 7.3% of those age 65 or over. (Source: U.S. Census Bureau)
Within Lake County are two incorporated cities, the county seat of Lakeport and Clearlake, the largest city, and the communities of Kelseyville, Blue Lakes, Clearlake Oaks, Clearlake Park, Cobb, Finley, Glenhaven, Hidden Valley Lake, Clearlake Riviera, Loch Lomond, Lower Lake, Lucerne, Middletown, Nice, Spring Valley, Upper Lake, Whispering Pines, and Witter Springs.
Lake County is mostly agricultural, with tourist facilities and some light industry. Major crops include pears, walnuts and, increasingly, wine grapes.

### 2000

According to official estimates based on the 2000 Census, 30% of housing units in Lake County were manufactured housing units. This was the highest percentage of any California county.

## Politics
### Overview

In its early history, Lake County leaned Democratic in Presidential and congressional elections. It supported every Democratic presidential candidate between 1864 and 1916 except Alton B. Parker in his 1904 landslide defeat. Nonetheless, between 1920 and 1984 Lake County tended towards leaning Republican and was won by just four Democratic nominees – Franklin D. Roosevelt in 1932 and 1936, Lyndon B. Johnson in 1964 and Jimmy Carter in 1976. Ronald Reagan in 1984 won a majority in the county, which later reverted to leaning Democratic. In 2016, Republicans broke 40% of the vote for the first time since 2004, and Democrats failed to win 50% of the vote for the first time since 1996. Democrats broke 50% again in 2020, increasing their margin of victory, although Republicans still increased their percentage of the vote. In 2022, the county was won by Republicans in several statewide races. Donald Trump won Lake County by 367 votes as of December 3 results, marking the first time since Reagan's 1984 run that a Republican candidate won the presidential race in Lake County.
On November 4, 2008, Lake County voted 52.6% for Proposition 8, which amended the California Constitution to ban same-sex marriages. In November 2024, Proposition 3, titled Constitutional Right to Marry, which effectively repealed Proposition 8, received 57.04% of "Yes" votes in the county.
United States presidential election results for Lake County, California :
| Year | Republican | Republican | Democratic | Democratic | Third party(ies) | Third party(ies) |
| Year | No. | % | No. | % | No. | % |
| 2024 | 13,161 | 48.93% | 12,794 | 47.57% | 941 | 3.50% |
| 2020 | 13,123 | 45.27% | 14,941 | 51.55% | 922 | 3.18% |
| 2016 | 10,603 | 42.95% | 11,500 | 46.59% | 2,581 | 10.46% |
| 2012 | 9,200 | 39.33% | 13,163 | 56.27% | 1,028 | 4.39% |
| 2008 | 9,935 | 38.76% | 14,854 | 57.96% | 840 | 3.28% |
| 2004 | 11,093 | 44.88% | 13,141 | 53.16% | 485 | 1.96% |
| 2000 | 8,699 | 41.58% | 10,717 | 51.23% | 1,503 | 7.18% |
| 1996 | 7,458 | 34.96% | 10,432 | 48.90% | 3,445 | 16.15% |
| 1992 | 6,678 | 28.77% | 10,548 | 45.44% | 5,987 | 25.79% |
| 1988 | 9,366 | 48.03% | 9,828 | 50.39% | 308 | 1.58% |
| 1984 | 10,874 | 54.83% | 8,648 | 43.61% | 309 | 1.56% |
| 1980 | 8,934 | 53.64% | 5,978 | 35.90% | 1,742 | 10.46% |
| 1976 | 5,462 | 44.46% | 6,374 | 51.88% | 449 | 3.65% |
| 1972 | 6,477 | 55.12% | 4,715 | 40.13% | 558 | 4.75% |
| 1968 | 4,464 | 49.00% | 3,777 | 41.46% | 870 | 9.55% |
| 1964 | 3,616 | 43.56% | 4,680 | 56.37% | 6 | 0.07% |
| 1960 | 4,176 | 58.74% | 2,897 | 40.75% | 36 | 0.51% |
| 1956 | 4,073 | 64.84% | 2,185 | 34.78% | 24 | 0.38% |
| 1952 | 4,367 | 67.52% | 2,038 | 31.51% | 63 | 0.97% |
| 1948 | 3,054 | 57.27% | 1,999 | 37.48% | 280 | 5.25% |
| 1944 | 2,059 | 54.97% | 1,671 | 44.61% | 16 | 0.43% |
| 1940 | 2,215 | 53.36% | 1,897 | 45.70% | 39 | 0.94% |
| 1936 | 1,797 | 48.74% | 1,837 | 49.82% | 53 | 1.44% |
| 1932 | 1,301 | 34.75% | 2,344 | 62.61% | 99 | 2.64% |
| 1928 | 1,820 | 65.37% | 926 | 33.26% | 38 | 1.36% |
| 1924 | 795 | 44.94% | 261 | 14.75% | 713 | 40.31% |
| 1920 | 993 | 57.23% | 571 | 32.91% | 171 | 9.86% |
| 1916 | 791 | 35.42% | 1,164 | 52.13% | 278 | 12.45% |
| 1912 | 0 | 0.00% | 1,118 | 51.86% | 1,038 | 48.14% |
| 1908 | 625 | 42.84% | 628 | 43.04% | 206 | 14.12% |
| 1904 | 641 | 45.40% | 594 | 42.07% | 177 | 12.54% |
| 1900 | 584 | 41.45% | 746 | 52.95% | 79 | 5.61% |
| 1896 | 546 | 38.00% | 854 | 59.43% | 37 | 2.57% |
| 1892 | 532 | 37.15% | 644 | 44.97% | 256 | 17.88% |
Lake County is in California's 4th congressional district, represented by Mike Thompson (D–St. Helena).
In the state legislature, Lake is in the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry, and the 2nd Senate District, represented by Democrat Mike McGuire.

### Voter registration

Eligible and registered voters :
| Eligible | 51,169 | 51,169 |
| Total registered voters | 37,368 | 73.03% |
| Democratic | 13,867 | 37.11% |
| Republican | 11,953 | 31.98% |
| American Independent | 2,321 | 6.21% |
| Green | 318 | 0.85% |
| Libertarian | 551 | 1.47% |
| Peace and Freedom | 341 | 0.91% |
| Unknown | 126 | 0.33% |
| Other | 272 | 0.80% |
| No party preference | 7,619 | 20.39% |

## Crime

The table below includes the number of actual offenses (including attempts) as reported by the Lake County Sheriff's Office, and the rate per 1,000 persons for each type of offense (crime for the cities of Lakeport and Clearlake is not included, being listed in separate table further below).
Population and crime rates (2020) :
| Population | 68,163 | 68,163 |
| Homicide | 1 | 0.01 |
| Rape | 13 | 0.19 |
| Robbery | 11 | 0.16 |
| Assault | 612 | 8.97 |
| Larceny | 226 | 3.29 |
| Burglary | 239 | 3.50 |
| Motor vehicle theft | 5 | 0.07 |
Cities by population and crime (2019) :
| City | Population | Violent crimes | Violent crime rate per 1,000 persons | Murder and nonnegligent manslaughter | Rape | Robbery | Aggravated assault | Property crimes | Property crime rate per 1,000 persons | Burglary | Larceny-theft | Motor vehicle theft | Arson |
| Clearlake | 15,400 | 119 | 7.72 | 1 | 19 | 36 | 63 | 460 | 29.87 | 146 | 210 | 104 | 11 |
| Lakeport | 4,959 | 34 | 6.85 | 0 | 3 | 7 | 24 | 160 | 32.26 | 29 | 110 | 21 | 0 |
CAL FIRE determined 8 wildfires in their jurisdiction in Lake County were caused by arson in 2023.

## Economy

The county's largest employers are the healthcare industry, Native American casinos, grocery stores, school districts, and electricity company Calpine, which operates in the Geysers geothermal field in the Mayacamas Mountains.
The only significant manufacturing operations in Lake County are Stokes Ladders in Kelseyville, which builds orchard and industrial ladders, and Reynolds Systems in Middletown, which specializes in detonators, igniters, precision initiating couplers, leads and boosters for the aerospace industry.
Lake County's economy is largely driven by agriculture. The main crops in 2022 were:
| Crop | Production (tons) | Value | Bearing acres |
| Grapes (wine) | 45,637 | $84,756,086 | 10,987 |
| Pears | 16,371 | $16,286,443 | 1,375.5 |
| Walnuts | 262 | $239,959 | 3,485 |
| Nursery production | | $624,085 | 16 |
| Vegetables (misc.) | | $287,078 | 9 |
| Cannabis (mixed light) | | unknown | 7.6 |
| Cannabis (outdoor) | | unknown | 178 |

### Wine Country

The first vineyards in Lake County were planted in the late 19th century, but Prohibition and the county's remoteness dealt a blow to the area's viticulture. A reemergence of the wine industry began in the 1970s, although most of the region's grapes are still trucked to neighboring Napa, Sonoma and Mendocino counties for vinification. The county saw its vineyard acreage increase from fewer than 100 acres (40 ha) in 1965 to more than 11,000 acres (4,500 ha) in 2023
The region is host to nine American Viticultural Areas, notably Guenoc Valley, High Valley and the Red Hills, and about 20 winery operations.

## Transportation
### Major highways

* State Route 20
* State Route 29
* State Route 53
* State Route 175
* State Route 281
There are also several numbered county routes in Lake County.

### Public transportation

Lake Transit serves all areas around Clear Lake. Local routes serve Lakeport, Clearlake and Lower Lake. Connections are also provided to St. Helena (in Napa County) and Ukiah (in Mendocino County). Some routes operate on weekdays only; no service is provided on Sundays and observed public holidays.

### Airports

Lampson Field (IATA: CKE, ICAO: LID, FAA LID: 1O2) is the county's public airport. A 4,000 foot (1,200 m) airstrip is located in Gravelly Valley, north of Lake Pillsbury. There are also several private airstrips located throughout the county. The county was once host to the Paul Hoberg Airport in the Cobb area, which by the early 1980s was considered abandoned.

### Historical railroads

In 1888 the Vaca Valley and Clear Lake Railroad reached Rumsey, but the planned line to Clear Lake was never built. The Clear Lake Railroad started work on a line from Hopland to Lakeport: "In November 1911 first ground was broken for the Hopland-Clear Lake railroad to Hopland. Mrs Harriet Lee Hammond, wife of the president of the road started construction. ... There were six miles of track out of Hopland ...", but this was also abandoned.

## Communities
### Cities

* Clearlake
* Lakeport (county seat)

### Census-designated places

* Clearlake Oaks
* Kelseyville Riviera★
* Cobb
* Hidden Valley Lake
* Kelseyville
* Lower Lake
* Lucerne
* Middletown
* Nice
* North Lakeport
* Soda Bay
* Spring Valley
* Upper Lake
★ As of 2022, the U.S. Census continues to use the community's former name of Clear Lake Riviera.

### Unincorporated communities

* Finley
* Glenhaven
* Loch Lomond
* Parramore Springs
* Riviera Heights
* Riviera West
* Whispering Pines

### Population ranking

The population ranking of the following table is based on the 2010 census of Lake County.
† county seat
| Rank | City/Town/etc. | Municipal type | Population (2010 Census) |
| 1 | Clearlake | City | 15,250 |
| 2 | Hidden Valley Lake | CDP | 5,579 |
| 3 | † Lakeport | City | 4,753 |
| 4 | Kelseyville | CDP | 3,353 |
| 5 | North Lakeport | CDP | 3,314 |
| 6 | Clearlake Riviera | CDP | 3,090 |
| 7 | Lucerne | CDP | 3,067 |
| 8 | Nice | CDP | 2,731 |
| 9 | Clearlake Oaks | CDP | 2,359 |
| 10 | Cobb | CDP | 1,778 |
| 11 | Middletown | CDP | 1,323 |
| 12 | Lower Lake | CDP | 1,294 |
| 13 | Upper Lake | CDP | 1,052 |
| 14 | Soda Bay | CDP | 1,016 |
| 15 | Spring Valley | CDP | 845 |
| 16 | Robinson Rancheria (Pomo Indians) | AIAN | 207 |
| 17 | Big Valley Rancheria (Pomo Indians) | AIAN | 139 |
| 18 | Upper Lake Rancheria (Pomo Indians) | AIAN | 87 |
| 19 | Sulphur Bank Rancheria (Pomo Indians) | AIAN | 61 |
| 20 | Middletown Rancheria (Pomo Indians) | AIAN | 56 |

## Notable people

* Michael Berryman, American actor
* Benjamin Dewell, early settler and rancher
* Andrew Kelsey, who was killed in 1849 for his mistreatment of local Wappo and Pomo Indians
* Ellis O. Knox, first African American to be awarded a Ph.D. on the West Coast of the United States
* Lillie Langtry, British actress and royal mistress