# Taleithiau'r Unol Daleithiau

Gweriniaeth ffederal yw Unol Daleithiau America; mae ganddi 50 talaith, un ardal ffederal (sef y brifddinas Washington, D.C.), pum prif diriogaeth ac amryw o ynysoedd bychain. Ers sefydlu'r wladwriaeth ym 1776 mae'r nifer o daleithiau wedi ehangu o'r 13 talaith wreiddiol i 50.

## Taleithiau

| Baner, enw a thalfyriad
 | Prifddinas
 | Dinas fwyaf
 | Cadarnhaodd y cyfansoddiad/ ymunodd â'r undeb
 | Poblogaeth (amcan, 2019) a'r nifer o Gynrychiolwyr |
| --- | --- | --- | --- | --- |
| Baner | Cymraeg | Saesneg | Talf. | Pobl. | Cyn. |
|  | Alabama
 | AL
 | Montgomery
 | Birmingham
 | 22ain | 14 Rhagfyr 1819
 | 4,903,185
 | 7
 |
|  | Alaska
 | AK
 | Juneau
 | Anchorage
 | 49ain | 3 Ionawr 1959
 | 731,545
 | 1
 |
|  | Arizona
 | AZ
 | Phoenix
 | 48ain | 14 Chwefror 1912
 | 7,278,717
 | 9
 |
|  | Arkansas
 | AR
 | Little Rock
 | 25ain | 15 Mehefin 1836
 | 3,017,804
 | 4
 |
|  | Califfornia
 | California
 | CA
 | Sacramento
 | Los Angeles
 | 31ain | 9 Medi 1850
 | 39,512,223
 | 53
 |
|  | Colorado
 | CO
 | Denver
 | 38ain | 1 Awst 1876
 | 5,758,736
 | 7
 |
|  | Connecticut
 | CT
 | Hartford
 | Bridgeport
 | 5ed | 9 Ionawr 1788
 | 3,565,278
 | 5
 |
|  | De Carolina
 | South Carolina
 | SC
 | Columbia
 | Charleston
 | 8fed | 23 Mai 1788
 | 5,148,714
 | 7
 |
|  | De Dakota
 | South Dakota
 | SD
 | Pierre
 | Sioux Falls
 | 40fed | 2 Tachwedd 1889
 | 884,659
 | 1
 |
|  | Delaware
 | DE
 | Dover
 | Wilmington
 | 1af | 7 Rhagfyr 1787
 | 973,764
 | 1
 |
|  | Efrog Newydd
 | New York
 | NY
 | Albany
 | Efrog Newydd
 | 11eg | 26 Gorffennaf 1788
 | 19,453,561
 | 27
 |
|  | Florida
 | FL
 | Tallahassee
 | Jacksonville
 | 27ain | 3 Mawrth 1845
 | 21,477,737
 | 27
 |
|  | Georgia
 | GA
 | Atlanta
 | 4ydd | 2 Ionawr 1788
 | 10,617,423
 | 14
 |
|  | Gogledd Carolina
 | North Carolina
 | NC
 | Raleigh
 | Charlotte
 | 12fed | 21 Tachwedd 1789
 | 10,488,084
 | 13
 |
|  | Gogledd Dakota
 | North Dakota
 | ND
 | Bismarck
 | Fargo
 | 39ain | 2 Tachwedd 1889
 | 762,062
 | 1
 |
|  | Gorllewin Virginia
 | West Virginia
 | WV
 | Charleston
 | 35ain | 20 June 1863
 | 1,792,147
 | 3
 |
|  | Hawaii
 | HI
 | Honolulu
 | 50fed | 21 Awst 1959
 | 1,415,872
 | 2
 |
|  | Idaho
 | ID
 | Boise
 | 43ain | 3 Gorffennaf 1890
 | 1,787,065
 | 2
 |
|  | Illinois
 | IL
 | Springfield
 | Chicago
 | 21ain | 3 Rhagfyr 1818
 | 12,671,821
 | 18
 |
|  | Indiana
 | IN
 | Indianapolis
 | 19eg | 11 Rhagfyr 1816
 | 6,732,219
 | 9
 |
|  | Iowa
 | IA
 | Des Moines
 | 29ain | 28 Rhagfyr 1846
 | 3,155,070
 | 4
 |
|  | Kansas
 | KS
 | Topeka
 | Wichita
 | 34ain | 29 Ionawr 1861
 | 2,913,314
 | 4
 |
|  | Kentucky
 | KY
 | Frankfort
 | Louisville
 | 15fed | 1 Mehefin 1792
 | 4,467,673
 | 6
 |
|  | Louisiana
 | LA
 | Baton Rouge
 | New Orleans
 | 18fed | 30 Ebrill 1812
 | 4,648,794
 | 6
 |
|  | Maine
 | ME
 | Augusta
 | Portland
 | 23ain | 15 Mawrth 1820
 | 1,344,212
 | 2
 |
|  | Maryland
 | MD
 | Annapolis
 | Baltimore
 | 7fed | 28 Ebrill 1788
 | 6,045,680
 | 8
 |
|  | Massachusetts
 | MA
 | Boston
 | 6ed | 6 Chwefror 1788
 | 6,892,503
 | 9
 |
|  | Mecsico Newydd
 | New Mexico
 | NM
 | Santa Fe
 | Albuquerque
 | 47ain | 6 Ionawr 1912
 | 2,096,829
 | 3
 |
|  | Michigan
 | MI
 | Lansing
 | Detroit
 | 26ain | 26 Ionawr 1837
 | 9,986,857
 | 14
 |
|  | Minnesota
 | MN
 | Saint Paul
 | Minneapolis
 | 32ain | 11 Mai 1858
 | 5,639,632
 | 8
 |
|  | Mississippi
 | MS
 | Jackson
 | 20fed | 10 Rhagfyr 1817
 | 2,976,149
 | 4
 |
|  | Missouri
 | MO
 | Jefferson City
 | Kansas City
 | 24ain | 10 Awst 1821
 | 6,137,428
 | 8
 |
|  | Montana
 | MT
 | Helena
 | Billings
 | 41ain | 8 Tachwedd 1889
 | 1,068,778
 | 1
 |
|  | Nebraska
 | NE
 | Lincoln
 | Omaha
 | 37ain | 1 Mawrth 1867
 | 1,934,408
 | 3
 |
|  | Nevada
 | NV
 | Carson City
 | Las Vegas
 | 36ain | 31 Hydref 1864
 | 3,080,156
 | 4
 |
|  | New Hampshire
 | NH
 | Concord
 | Manchester
 | 9fed | 21 Mehefin 1788
 | 1,359,711
 | 2
 |
|  | New Jersey
 | NJ
 | Trenton
 | Newark
 | 3ydd | 18 Rhagfyr 1787
 | 8,882,190
 | 12
 |
|  | Ohio
 | OH
 | Columbus
 | 17eg | 1 Mawrth 1803
 | 11,689,100
 | 16
 |
|  | Oklahoma
 | OK
 | Oklahoma City
 | 46ain | 16 Tachwedd 1907
 | 3,956,971
 | 5
 |
|  | Oregon
 | OR
 | Salem
 | Portland
 | 33ain | 14 Chwefror 1859
 | 4,217,737
 | 5
 |
|  | Pennsylvania
 | PA
 | Harrisburg
 | Philadelphia
 | 2il | 12 Rhagfyr 1787
 | 12,801,989
 | 18
 |
|  | Rhode Island
 | RI
 | Providence
 | 13eg | 29 Mai 1790
 | 1,059,361
 | 2
 |
|  | Tennessee
 | TN
 | Nashville
 | 16eg | 1 Mehefin 1796
 | 6,829,174
 | 9
 |
|  | Texas
 | TX
 | Austin
 | Houston
 | 28ain | 29 Rhagfyr 1845
 | 28,995,881
 | 36
 |
|  | Utah
 | UT
 | Salt Lake City
 | 45ain | 4 Ionawr 1896
 | 3,205,958
 | 4
 |
|  | Vermont
 | VT
 | Montpelier
 | Burlington
 | 14eg | 4 Mawrth 1791
 | 623,989
 | 1
 |
|  | Virginia
 | VA
 | Richmond
 | Virginia Beach
 | 10fed | 25 Mehefin 1788
 | 8,535,519
 | 11
 |
|  | Washington
 | WA
 | Olympia
 | Seattle
 | 42ain | 11 Tachwedd 1889
 | 7,614,893
 | 10
 |
|  | Wisconsin
 | WI
 | Madison
 | Milwaukee
 | 30ain | 29 Mai 1848
 | 5,822,434
 | 8
 |
|  | Wyoming
 | WY
 | Cheyenne
 | 44ain | 10 Gorffennaf 1890
 | 578,759
 | 1
 |

## Ardal ffederal

| Baner, enw a thalfyriad
 | Enw amgen
 | Sefydlwyd
 | Poblogaeth (amcan, 2019) a'r nifer o Gynrychiolwyr |
| --- | --- | --- | --- |
| Baner | Cymraeg | Saesneg | Talf. | Pobl. | Cyn. |
|  | Ardal Columbia
 | District of Columbia
 | DC
 | Washington
 | 16 Gorffennaf 1790
 | 705,749
 | 1
 |