# Cass County, Nebraska

Cass County is a county in the U.S. state of Nebraska. As of the 2020 United States census, the population was 26,598. Its county seat and largest city is Plattsmouth. The county was formed in 1855, and was named for General Lewis Cass, an American military officer, politician, and statesman.
Cass County is included in the Omaha–Council Bluffs, NE–IA Metropolitan Statistical Area.
In the Nebraska license plate system, Cass County is represented by the prefix 20 (it had the 20th-largest number of vehicles registered in the county when the license plate system was established in 1922).

## Geography

Cass County lies on the east side of Nebraska. Its east boundary line abuts the west boundary line of the state of Iowa, across the Missouri River. According to the US Census Bureau, the county has an area of 566 square miles (1,470 km$^2$), of which 557 square miles (1,440 km$^2$) is land and 8.4 square miles (22 km$^2$) (1.5%) is water.

### Major highways

* Interstate 80
* U.S. Highway 6
* U.S. Highway 34
* U.S. Highway 75
* Nebraska Highway 1
* Nebraska Highway 43
* Nebraska Highway 50
* Nebraska Highway 63
* Nebraska Highway 66
* Nebraska Highway 67

### Protected areas

* Beaver Lake
* Louisville State Recreation Area
* Eugene T. Mahoney State Park
* Platte River State Park
* Schilling Wildlife Management Area

### Adjacent counties

* Sarpy County – north
* Mills County, Iowa – northeast
* Fremont County, Iowa – southeast
* Otoe County – south
* Lancaster County – west
* Saunders County – northwest
Due to its proximity to Cass County, Iowa, and because both of those counties receive most of their broadcasts from Omaha, Nebraska, references to 'Cass County' must be frequently disambiguated, or result in confusion.

## Demographics

As of the 2020 United States census, there were 26,598 people and 10,073 households. The population density was 48.5 people per square mile (18.7 people/km$^2$). There were 11,761 housing units at an average density of 21 units per square mile (8.1/km$^2$). The racial makeup of the county was 92.8% White, 0.8% Black or Black or African American, 0.7% Native American, 0.6% Asian, 0.1% Native Hawaiian and Pacific Islander, and 1.9% from two or more races. 3.8% of the population were Hispanic or Latino of any race.
As of the 2010 United States Census, there were 25,241 people, 9,698 households and 7,078 families. The population density was 45 people per square mile (17 people/km$^2$). There were 11,117 housing units at an average density of 20 units per square mile (7.7/km$^2$). The racial makeup of the county was 89.3% White, 0.7% Black or Black or African American, 1.0% Native American, 0.6% Asian, 0.1% Native Hawaiian and Pacific Islander, 0.6% other races, and 1.5% from two or more races. 2.4% of the population were Hispanic or Latino of any race.
As of the 2000 United States Census, there were 24,334 people, 9,161 households, and 6,806 families in the county. The population density was 44 people per square mile (17 people/km$^2$). There were 10,179 housing units at an average density of 18 units per square mile (6.9/km$^2$). The racial makeup of the county was 97.89% White, 0.18% Black or African American, 0.30% Native American, 0.35% Asian, 0.02% Pacific Islander, 0.35% from other races, and 0.92% from two or more races. 1.46% of the population were Hispanic or Latino of any race. 39.4% were of German, 9.6% American, 8.8% Irish and 7.9% English ancestry.
There were 9,161 households, out of which 35.80% had children under the age of 18 living with them, 63.30% were married couples living together, 7.60% had a female householder with no husband present, and 25.70% were non-families. 21.60% of all households were made up of individuals, and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.07.
The county population contained 27.90% under the age of 18, 7.00% from 18 to 24, 29.00% from 25 to 44, 23.80% from 45 to 64, and 12.30% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 97.70 males. For every 100 females age 18 and over, there were 95.00 males.
The median income for a household in the county was $46,515, and the median income for a family was $52,196. Males had a median income of $36,639 versus $24,612 for females. The per capita income for the county was $20,156. About 4.20% of families and 5.20% of the population were below the poverty line, including 7.10% of those under age 18 and 4.50% of those age 65 or over.

## Communities
### Cities

* Louisville
* Plattsmouth (county seat)
* Weeping Water

### Villages

* Alvo
* Avoca
* Cedar Creek
* Eagle
* Elmwood
* Greenwood
* Manley
* Murdock
* Murray
* Nehawka
* South Bend
* Union

### Census-designated places

* Beaver Lake
* Buccaneer Bay
* Lake Waconda

### Unincorporated communities

* Cullom
* Factoryville
* Mynard
* Rock Bluff
* Wabash

### Census divisions

Cass County is divided into the following divisions, called precincts, except for the cities of Plattsmouth and Weeping Water.
* Avoca
* Center
* East Rock Bluff
* Eight Mile Grove
* Elmwood
* Greenwood
* Liberty
* City of Louisville
* Mount Pleasant
* Nehawka
* City of Plattsmouth
* Plattsmouth
* Salt Creek
* South Bend
* Stove Creek
* Tipton
* Weeping Water (City)
* Weeping Water
* West Rock Bluff

## Politics

At the presidential level, Cass County voters have voted predominantly for the Republican candidate. In only one national election since 1936 has the county given a majority to the Democratic Party candidate, that being 1964, which Lyndon B. Johnson won in a landslide nationally.
United States presidential election results for Cass County, Nebraska :
| Year | Republican | Republican | Democratic | Democratic | Third party(ies) | Third party(ies) |
| Year | No. | % | No. | % | No. | % |
| 2024 | 10,685 | 67.50% | 4,824 | 30.47% | 321 | 2.03% |
| 2020 | 10,121 | 66.04% | 4,737 | 30.91% | 468 | 3.05% |
| 2016 | 8,452 | 65.35% | 3,484 | 26.94% | 997 | 7.71% |
| 2012 | 7,556 | 62.04% | 4,367 | 35.85% | 257 | 2.11% |
| 2008 | 7,120 | 58.74% | 4,753 | 39.21% | 249 | 2.05% |
| 2004 | 7,763 | 67.33% | 3,619 | 31.39% | 147 | 1.28% |
| 2000 | 6,144 | 59.77% | 3,656 | 35.56% | 480 | 4.67% |
| 1996 | 4,878 | 50.37% | 3,477 | 35.90% | 1,330 | 13.73% |
| 1992 | 4,314 | 43.23% | 2,949 | 29.55% | 2,716 | 27.22% |
| 1988 | 4,664 | 55.61% | 3,677 | 43.84% | 46 | 0.55% |
| 1984 | 5,461 | 68.04% | 2,499 | 31.14% | 66 | 0.82% |
| 1980 | 5,193 | 66.42% | 2,007 | 25.67% | 618 | 7.90% |
| 1976 | 3,807 | 53.31% | 3,205 | 44.88% | 129 | 1.81% |
| 1972 | 4,503 | 71.39% | 1,805 | 28.61% | 0 | 0.00% |
| 1968 | 3,185 | 57.61% | 1,739 | 31.45% | 605 | 10.94% |
| 1964 | 2,947 | 42.57% | 3,975 | 57.43% | 0 | 0.00% |
| 1960 | 4,506 | 61.68% | 2,799 | 38.32% | 0 | 0.00% |
| 1956 | 4,814 | 63.87% | 2,723 | 36.13% | 0 | 0.00% |
| 1952 | 5,088 | 66.16% | 2,602 | 33.84% | 0 | 0.00% |
| 1948 | 3,527 | 53.70% | 3,041 | 46.30% | 0 | 0.00% |
| 1944 | 4,588 | 59.34% | 3,144 | 40.66% | 0 | 0.00% |
| 1940 | 4,704 | 56.46% | 3,627 | 43.54% | 0 | 0.00% |
| 1936 | 3,669 | 42.44% | 4,922 | 56.93% | 54 | 0.62% |
| 1932 | 2,756 | 34.14% | 5,155 | 63.86% | 161 | 1.99% |
| 1928 | 4,970 | 63.91% | 2,739 | 35.22% | 68 | 0.87% |
| 1924 | 3,639 | 49.55% | 2,352 | 32.03% | 1,353 | 18.42% |
| 1920 | 3,575 | 58.35% | 2,192 | 35.78% | 360 | 5.88% |
| 1916 | 1,927 | 40.79% | 2,595 | 54.93% | 202 | 4.28% |
| 1912 | 970 | 22.41% | 2,009 | 46.41% | 1,350 | 31.19% |
| 1908 | 2,440 | 49.09% | 2,387 | 48.03% | 143 | 2.88% |
| 1904 | 2,711 | 58.76% | 1,466 | 31.77% | 437 | 9.47% |
| 1900 | 2,922 | 55.02% | 2,259 | 42.53% | 130 | 2.45% |