According to theU.S. Census Bureau, the county has a total area of 438 square miles (1,130 km2), of which 435 square miles (1,130 km2) is land and 2.8 square miles (7.3 km2) (0.6%) is water.[6]
As of the2010 census, there were 10,261 people, 4,204 households, and 2,694 families residing in the county. Thepopulation density was 23.43 people per square mile (9.05 people/km2). There were 5,023 housing units at an average density of 11.47 units per square mile (4.43 units/km2). The racial makeup of the county was 96.94%White, 0.57%Black orAfrican American, 0.42%Native American, 0.36%Asian, 0.03%Pacific Islander, 6.53% fromother races, and 1.02% from two or more races. Approximately 1.73% of the population wereHispanic orLatino of any race.
There were 4,204 households, out of which 28.28% had children under the age of 18 living with them, 51.05% weremarried couples living together, 8.68% had a female householder with no husband present, and 35.92% were non-families. 31.14% of all households were made up of individuals, and 15.37% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.94.
In the county, the population was spread out, with 24.04% under the age of 18, 9.27% from 18 to 24, 20.29% from 25 to 44, 25.93% from 45 to 64, and 20.47% who were 65 years of age or older. The median age was 41.6 years. For every 100 females there were 91.22 males. For every 100 females age 18 and over, there were 91.03 males.
The median income for a household in the county was $35,239, and the median income for a family was $45,959. Males had a median income of $31,843 versus $25,231 for females. Theper capita income for the county was $18,148. About 10.2% of families and 13.3% of the population were below thepoverty line, including 13.4% of those under age 18 and 16.7% of those age 65 or over.
According to the Association of Religion Data Archives County Membership Report (2010), Grundy County is sometimes regarded as being on the northern edge of the Bible Belt, with evangelical Protestantism being the majority religion. The most predominant denominations among residents in Grundy County who adhere to a religion areSouthern Baptists (49.86%),United Methodists (13.51%), andDisciples of Christ (6.95%).
At the presidential level, Grundy County is reliably Republican. Like many of the rural counties throughout Missouri,Donald Trump carried the county easily in2016 and2020.Bill Clinton was the last Democratic presidential nominee to carry Grundy County in1996 with a plurality of the vote, and a Democrat hasn't won majority support from the county's voters in a presidential election sinceLyndon Johnson in1964.
Like most rural areas throughout northern Missouri, voters in Grundy County generally adhere to socially and culturallyconservative principles which tend to influence their Republican leanings. In 2004, Missourians voted ona constitutional amendment to define marriage as the union between a man and a woman—it overwhelmingly won in Grundy County with 77% of the vote. The initiative passed the state with 71% support from voters. In 2006, Missourians voted ona constitutional amendment to fund and legalize embryonic stem cell research in the state—it failed in Grundy County with 55% voting against the measure. The initiative narrowly passed the state with 51% of support from voters as Missouri became one of the first states in the nation to approveembryonic stem cell research. Despite Grundy County's longstanding tradition of supporting socially conservative platforms, voters in the county have a penchant for advancingpopulist causes like increasing theminimum wage. In 2006, Missourians voted on a proposition (Proposition B) to increase the minimum wage in the state to $6.50 an hour—it passed Grundy County with 61% of the vote. The proposition strongly passed every single county in Missouri with 79% voting in favor. (During the same election, voters in five other states also strongly approved increases in the minimum wage.) In 2018, Missourians voted on a proposition (Proposition A) concerningright to work, the outcome of which ultimately reversed the right to work legislation passed in the state the previous year. 63.53% of Grundy County voters cast their ballots to overturn the law.
The 2020 presidential primaries for both the Democratic and Republican parties were held in Missouri on March 10. On the Democratic side, formerVice PresidentJoe Biden (D-Delaware) both won statewide and carried Grundy County by a wide margin. Biden went on to defeatPresidentDonald Trump in the general election.
Missouri Democratic Presidential Primary – Grundy County (2020)
The 2016 presidential primaries for both the Republican and Democratic parties were held in Missouri on March 15. BusinessmanDonald Trump (R-New York) narrowly won the state overall, but received majority support in Grundy County.
Missouri Republican Presidential Primary – Grundy County (2016)
The 2012 Missouri Republican Presidential Primary's results were nonbinding on the state's national convention delegates. Voters in Grundy County supported formerU.S. SenatorRick Santorum (R-Pennsylvania), who finished first in the state at large, but eventually lost the nomination to formerGovernorMitt Romney (R-Massachusetts). Delegates to the congressional district and state conventions were chosen at a county caucus, which selected delegations favoringU.S. RepresentativeRon Paul (R-Texas). IncumbentPresidentBarack Obama easily won the Missouri Democratic Primary and renomination. He defeated Romney in the general election.
In 2008, the Missouri Republican Presidential Primary was closely contested, withSenatorJohn McCain (R-Arizona) prevailing and eventually winning the nomination.
Missouri Republican Presidential Primary – Grundy County (2008)
Then-SenatorHillary Clinton (D-New York) received more votes than any candidate from either party in Grundy County during the 2008 presidential primary. Despite initial reports that Clinton had won Missouri,Barack Obama (D-Illinois), also aSenator at the time, narrowly defeated her statewide and later became that year's Democratic nominee, going on to win the presidency.
Missouri Democratic Presidential Primary – Grundy County (2008)
Shoemaker, Floyd C. "Grundy County: Home of Experimentation and Progressive Education Trends."Missouri Historical Review 52 (April 1958): 235-245.online