Jefferson County, Ohio
Sir yn nhalaith Ohio, Unol Daleithiau America yw Jefferson County. Cafodd ei henwi ar ôl Thomas Jefferson. Sefydlwyd Jefferson County, Ohio ym 1797 a sedd weinyddol y sir (a elwir weithiau'n 'dref sirol' neu'n 'brifddinas y sir') yw Steubenville, Ohio.
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| Math | sir  |
|---|---|
| Enwyd ar ôl | Thomas Jefferson |
| Prifddinas | Steubenville, Ohio |
| Poblogaeth | 65,249 |
| Sefydlwyd |
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| Daearyddiaeth | |
| Gwlad |  Unol Daleithiau America |
| Arwynebedd | 1,064 km² |
| Talaith | Ohio |
| Yn ffinio gyda | Columbiana County, Carroll County, Hancock County, Brooke County, Ohio County, Belmont County, Harrison County |
| Cyfesurynnau | 40.38°N 80.76°W |
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Mae ganddi arwynebedd o 1,064 cilometr sgwâr. Allan o'r arwynebedd hwn, y canran o ffurfiau dyfrol, megis llynnoedd ac afonydd, yw 0.6% . Yn ôl cyfrifiad y wlad, poblogaeth y sir yw: 65,249 (1 Ebrill 2020)[1]. Mewn cymhariaeth, yn 2016 roedd poblogaeth Caerdydd yn 361,462 a Rhyl tua 26,000.[2]
Mae'n ffinio gyda Columbiana County, Carroll County, Hancock County, Brooke County, Ohio County, Belmont County, Harrison County. Cedwir rhestr swyddogol o henebion ac adeiladau cofrestredig y sir yn: National Register of Historic Places listings in Jefferson County, Ohio.
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| Map o leoliad y sir o fewn Ohio | Lleoliad Ohio o fewn UDA |
Ceir sawl sir o’r un enw gan gynnwys:
- Jefferson County, Alabama
- Jefferson County, Arkansas
- Jefferson County, Colorado
- Jefferson County, Efrog Newydd
- Jefferson County, Florida
- Jefferson County, Georgia
- Jefferson County, Gorllewin Virginia
- Jefferson County, Idaho
- Jefferson County, Illinois
- Jefferson County, Indiana
- Jefferson County, Iowa
- Jefferson County, Kansas
- Jefferson County, Kentucky
- Jefferson County, Mississippi
- Jefferson County, Missouri
- Jefferson County, Montana
- Jefferson County, Nebraska
Trefi mwyaf
Mae gan y sir yma boblogaeth o tua 65,249 (1 Ebrill 2020)[1]. Dyma rai o'r dinasoedd, trefi neu gymunedau mwyaf poblog y sir:
Rhestr Wicidata:
| Tref neu gymuned | Poblogaeth | Arwynebedd |
|---|---|---|
| Steubenville, Ohio | 18161[3] | 27.504593[4] 27.524546[5] |
| Island Creek Township | 10173[3] | 41.3 |
| Cross Creek Township | 7870[3] | 32.6 |
| Toronto, Ohio | 5303[3] | 5.509705[4] 5.526798[5] |
| Knox Township | 4317[3] | 29.7 |
| Steubenville Township | 4117[3] | 7.8 |
| Warren Township | 3832[3] | 23.2 |
| Wintersville, Ohio | 3765[3] | 3.12 |
| Mingo Junction, Ohio | 3347[3] | 7.408849[4] 7.407864[5] |
| Smithfield Township | 3011[3] | 37.7 |
| Salem Township | 2778[3] | 36.6 |
| Wells Township | 2491[3] | 27.1 |
| Mount Pleasant Township | 2191[3] | 19.1 |
| Wayne Township | 2093[3] | 38.7 |
| Springfield Township | 2005[3] | 30.7 |