Living Person
Jefferson_County,_Iowa
is
As of April 19, 2026
6 years old
approximately!
Date of Birth
(2020 ) is
Rat
Year
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
approx.Cosmic Age Calculator
Moon
approx. 85.4 years old
Mercury
approx. 26.5 years old
Venus
approx. 10.4 years old
Mars
approx. 3.4 years old
Jupiter
approx. 0.5 years old
Saturn
approx. 0.2 years old
* Calculated based on each planet's orbital period.
Jefferson County, Iowa | |
|---|---|
 The Courthouse in Fairfield is on the NRHP | |
 Location within the U.S. state of Iowa | |
| Coordinates: 41°01′53″N 91°56′41″W / 41.031388888889°N 91.944722222222°W | |
| Country |  United States |
| State |  Iowa |
| Founded | January 21, 1839 |
| Named after | Thomas Jefferson |
| Seat | Fairfield |
| Largest city | Fairfield |
| Area | |
• Total | 437 sq mi (1,130 km) |
| • Land | 436 sq mi (1,130 km) |
| • Water | 1.4 sq mi (3.6 km) 0.3% |
| Population (2020) | |
• Total | 15,663 |
• Estimate (2025) | 15,291  |
| • Density | 35.9/sq mi (13.9/km) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 1st |
| Website | https://jeffersoncounty.iowa.gov/ |
| |
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