A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Jefferson County | |
|---|---|
 Jefferson County Courthouse | |
 Flag  Seal | |
 Location within the U.S. state of Pennsylvania | |
 Pennsylvania's location within the U.S. | |
| Coordinates: 41°08′N 79°00′W / 41.13°N 79°W | |
| Country |  United States |
| State |  Pennsylvania |
| Founded | October 1, 1830 |
| Named for | Thomas Jefferson |
| Seat | Brookville |
| Largest borough | Punxsutawney |
| Area | |
| • Total | 657 sq mi (1,700 km2) |
| • Land | 652 sq mi (1,690 km2) |
| • Water | 4.4 sq mi (11 km2) 0.7% |
| Population (2020) | |
| • Total | 44,492 |
| • Density | 68/sq mi (26/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 15th |
| Website | www |
Jefferson County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 44,492.[1] Its county seat is Brookville.[2] The county was established on March 26, 1804, from part of Lycoming County and later organized in 1830.[3] It is named for President Thomas Jefferson.[4] It is home to Punxsutawney Phil, the most famous groundhog that predicts when spring will come every February 2 on Groundhog Day. The county is part of the North Central Pennsylvania region of the state.[a]
Geography
According to the U.S. Census Bureau, the county has a total area of 657 square miles (1,700 km2), of which 652 square miles (1,690 km2) is land and 4.4 square miles (11 km2) (0.7%) is water.[5] It has a warm-summer humid continental climate (Dfb) and average monthly temperatures in Brookville range from 24.8 °F in January to 68.8 °F in July, while in Punxsutawney they range from 25.7 °F in January to 69.6 °F in July.[6]
Adjacent counties
- Forest County (northwest)
- Elk County (northeast)
- Clearfield County (east)
- Indiana County (south)
- Armstrong County (southwest)
- Clarion County (west)
Major highways
Streams
There are many named streams flowing through Jefferson County, far too many to list here. An exhaustive list is presented in a separate article. All those streams eventually flow to the Allegheny River except for Bear Run, 1.36 square miles (3.5 km2), in the southeast which flows into the Susquehanna River. The principal streams and the area of their watersheds that lie within the county are:
- Clarion River: 130.50 square miles (338.0 km2)
- Little Toby Creek: 34.46 square miles (89.3 km2)
- Clear Creek: 20.12 square miles (52.1 km2)
- Cathers Run: 15.69 square miles (40.6 km2)
- Mill Creek: 30.70 square miles (79.5 km2)
- Redbank Creek: 375.52 square miles (972.6 km2)
- North Fork Creek: 91.63 square miles (237.3 km2)
- Clear Run: 9.79 square miles (25.4 km2)
- Pekin Run: 10.12 square miles (26.2 km2)
- Sandy Lick Creek: 143.98 square miles (372.9 km2)
- Wolf Run: 18.19 square miles (47.1 km2)
- Soldier Run: 11.09 square miles (28.7 km2)
- Trout Run: 10.74 square miles (27.8 km2)
- Mill Creek: 53.69 square miles (139.1 km2)
- Fivemile Run: 17.55 square miles (45.5 km2)
- Falls Creek: 11.39 square miles (29.5 km2)
- Little Sandy Creek: 70.65 square miles (183.0 km2)
- North Fork Creek: 91.63 square miles (237.3 km2)
- Mahoning Creek: 149.63 square miles (387.5 km2)
- East Branch Mahoning Creek: 15.27 square miles (39.5 km2)
- Stump Creek: 14.86 square miles (38.5 km2)
- Big Run: 19.41 square miles (50.3 km2)
- Canoe Creek: 11.57 square miles (30.0 km2)
- Elk Run: 13.20 square miles (34.2 km2)
- Pine Run: 18.88 square miles (48.9 km2)
Demographics
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1810 | 161 | — | |
| 1820 | 561 | 248.4% | |
| 1830 | 2,025 | 261.0% | |
| 1840 | 7,253 | 258.2% | |
| 1850 | 13,518 | 86.4% | |
| 1860 | 18,270 | 35.2% | |
| 1870 | 21,656 | 18.5% | |
| 1880 | 27,935 | 29.0% | |
| 1890 | 44,005 | 57.5% | |
| 1900 | 59,113 | 34.3% | |
| 1910 | 63,090 | 6.7% | |
| 1920 | 62,104 | −1.6% | |
| 1930 | 52,114 | −16.1% | |
| 1940 | 54,090 | 3.8% | |
| 1950 | 49,147 | −9.1% | |
| 1960 | 46,792 | −4.8% | |
| 1970 | 43,695 | −6.6% | |
| 1980 | 48,303 | 10.5% | |
| 1990 | 46,083 | −4.6% | |
| 2000 | 45,932 | −0.3% | |
| 2010 | 45,200 | −1.6% | |
| 2020 | 44,492 | −1.6% | |
| [7] | |||
As of the census[8] of 2000, there were 45,932 people, 18,375 households, and 12,862 families residing in the county. The population density was 70 people per square mile (27 people/km2). There were 22,104 housing units at an average density of 34 units per square mile (13/km2). The racial makeup of the county was 98.97% White, 0.13% Black or African American, 0.16% Native American, 0.21% Asian, 0.01% Pacific Islander, 0.07% from other races, and 0.45% from two or more races. 0.41% of the population were Hispanic or Latino of any race. 31.1% were of German, 13.4% Italian, 10.8% American, 9.2% Irish and 7.8% English ancestry.
There were 18,375 households, out of which 30.30% had children under the age of 18 living with them, 56.80% were married couples living together, 9.10% had a female householder with no husband present, and 30.00% were non-families. 26.60% of all households were made up of individuals, and 13.80% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.96.
In the county, the population was spread out, with 23.60% under the age of 18, 7.70% from 18 to 24, 27.20% from 25 to 44, 23.60% from 45 to 64, and 17.90% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 95.70 males. For every 100 females age 18 and over, there were 92.60 males.
2020 census
| Race | Num. | Perc. |
|---|---|---|
| White (NH) | 42,317 | 95.1% |
| Black or African American (NH) | 125 | 0.3% |
| Native American (NH) | 45 | 0.1% |
| Asian (NH) | 100 | 0.2% |
| Pacific Islander (NH) | 8 | 0.02% |
| Other/Mixed (NH) | 1,500 | 3.4% |
| Hispanic or Latino | 397 | 1% |
Law and government
Jefferson County is a very safe county for the Republican Party, which has won the vote of all but two presidential elections.
| Year | Republican | Democratic | Third party | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 2020 | 17,964 | 78.54% | 4,529 | 19.80% | 379 | 1.66% |
| 2016 | 15,192 | 77.53% | 3,650 | 18.63% | 753 | 3.84% |
| 2012 | 13,048 | 71.78% | 4,787 | 26.33% | 343 | 1.89% |
| 2008 | 12,057 | 63.75% | 6,447 | 34.09% | 408 | 2.16% |
| 2004 | 13,371 | 68.36% | 6,073 | 31.05% | 116 | 0.59% |
| 2000 | 11,473 | 65.24% | 5,566 | 31.65% | 547 | 3.11% |
| 1996 | 8,156 | 49.56% | 5,846 | 35.52% | 2,455 | 14.92% |
| 1992 | 7,271 | 41.05% | 5,998 | 33.87% | 4,442 | 25.08% |
| 1988 | 9,743 | 60.48% | 6,235 | 38.71% | 131 | 0.81% |
| 1984 | 11,334 | 65.31% | 5,950 | 34.28% | 71 | 0.41% |
| 1980 | 9,628 | 57.38% | 6,296 | 37.53% | 854 | 5.09% |
| 1976 | 9,437 | 55.09% | 7,456 | 43.53% | 237 | 1.38% |
| 1972 | 11,631 | 68.92% | 5,024 | 29.77% | 221 | 1.31% |
| 1968 | 10,214 | 55.67% | 6,839 | 37.28% | 1,294 | 7.05% |
| 1964 | 8,373 | 43.47% | 10,851 | 56.34% | 37 | 0.19% |
| 1960 | 13,845 | 63.82% | 7,811 | 36.01% | 38 | 0.18% |
| 1956 | 13,051 | 66.26% | 6,627 | 33.64% | 19 | 0.10% |
| 1952 | 11,833 | 64.61% | 6,365 | 34.75% | 116 | 0.63% |
| 1948 | 9,395 | 61.43% | 5,632 | 36.82% | 268 | 1.75% |
| 1944 | 10,970 | 62.52% | 6,425 | 36.62% | 152 | 0.87% |