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Rhestr gwledydd yn nhrefn eu poblogaeth yw hyn. Mae'r ffigyrau yn dod o'r CIA World Factbook 2002 -- dydy nhw ddim bob amser yn gyfoes, ond mae nhw'n weddol agos.
Gweler hefyd: Rhestr gwledydd , Rhestr gwledydd yn ôl cyfandir
Lle
Gwlad
Poblogaeth
1
Tsieina (Gweriniaeth Pobl Tseina)
Tir mawr Tseina
Hong Kong
Macau
Cyfanswm
1,284,303,705
7,210,505
453,733
1,291,967,943
2
India
1,045,845,226
3
Unol Daleithiau
Samoa America
Guam
Ynysoedd Gogleddol y Marianas
Puerto Rico
Ynysoedd Virgin yr Unol Daleithiau
Cyfanswm
278,058,881
67,084
157,557
74,612
3,937,316
122,211
282,417,661
4
Indonesia
231,328,092
5
Brasil
176,029,560
6
Pakistan
147,663,429
7
Rwsia
144,978,573
8
Bangladesh
133,376,684
9
Nigeria
129,934,911
10
Japan
126,974,628
11
México
103,400,165
12
Pilipinas
84,525,639
13
Yr Almaen
83,251,851
14
Fietnam
81,098,416
15
Yr Aifft
70,712,345
16
Ethiopia
67,673,031
17
Twrci
67,308,928
18
Iran
66,622,704
19
Gwlad Thai
62,354,402
20
Prydain Fawr a Gogledd Iwerddon
Anguilla
Ynysoedd Virgin Prydeinig
Bermuda
Ynysoedd Cayman
Ynysoedd y Falklands
Gibraltar
Guernsey
Ynys Manaw
Jersey
Montserrat
Ynys Pitcairn
Saint Helena
Ynysoedd Turks a Caicos
Cyfanswm
59,778,002
12,132
20,812
63,503
35,527
2,826
27,649
64,342
73,489
89,361
7,574
47
7,266
18,122
60,070,440
21
Ffrainc
Giana Ffrengig
Polynesia Ffrengig
Guadeloupe
Martinique
Mayotte
Caledonia Newydd
Reunion
Saint Pierre a Miquelon
Wallis a Futuna
Cyfanswm
59,765,983
177,562
253,506
431,170
418,454
163,366
204,863
732,570
6,928
15,435
61,955,081
22
Yr Eidal
57,715,625
23
Gweriniaeth Ddemocrataidd Congo
55,225,478
24
Wcráin
48,396,470
25
De Corea
48,324,000
26
De Affrica
43,647,658
27
Myanmar
42,238,224
28
Colombia
41,008,227
29
Sbaen
40,077,100
30
Gwlad Pwyl
38,625,478
31
Yr Ariannin
37,812,817
32
Tansania
37,187,939
33
Swdan
37,090,298
34
Algeria
32,277,942
35
Canada
31,902,268
36
Moroco
Sahara Gorllewinol
Cyfanswm
31,167,783
250,559
31,418,342
37
Kenya
31,138,735
38
Periw
27,949,639
39
Afghanistan
27,755,775
40
Nepal
25,873,917
41
Uzbekistan
25,563,441
42
Iwganda
24,699,073
43
Venezuela
24,287,670
44
Irac
24,001,816
45
Saudi Arabia
23,513,330
46
Malaysia
22,662,365
47
Taiwan , Gweriniaeth Tseina
22,548,009
48
Gogledd Corea
22,224,195
49
Romania
21,698,181
50
Ghana
20,244,154
51
Sri Lanka
19,607,519
52
Moçambique
19,576,783
53
Awstralia
Ynys y Nadolig
Ynysoedd Cocos
Ynys Norfolk
Cyfanswm
19,546,792
2,771
633
1,879
19,552,075
54
Yemen
18,701,257
55
Syria
17,155,814
56
Côte d'Ivoire
16,804,784
57
Kazakhstan
16,741,519
58
Madagascar
16,473,477
59
Yr Iseldiroedd
Aruba
Antiles yr Iseldiroedd
Cyfanswm
15,981,472
70,007
212,226
16,263,705
60
Camerŵn
15,803,220
61
Chile
15,328,467
62
Ecuador
13,183,978
63
Guatemala
12,974,361
64
Cambodia
12,491,501
65
Burkina Faso
12,272,289
66
Simbabwe
11,365,366
67
Cuba
11,184,023
68
Mali
11,008,518
70
Groeg
10,623,835
71
Serbia a Montenegro
10,600,000
71
Malaŵi
10,548,250
72
Angola
10,366,031
73
Niger
10,355,156
74
Belarws
10,350,194
75
Senegal
10,284,929
76
Y Weriniaeth Tsiec
10,264,212
77
Gwlad Belg
10,258,762
78
Hwngari
10,106,017
79
Portiwgal
10,066,253
80
Zambia
9,770,199
81
Tunisia
9,705,102
82
Sweden
8,876,744
83
Tsiad
8,707,078
84
Gweriniaeth Dominicaidd
8,581,477
85
Bolifia
8,300,463
86
Awstria
8,150,835
87
Azerbaijan
7,771,092
88
Bwlgaria
7,707,495
89
Guinea
7,613,870
90
Somalia
7,488,773
91
Rwanda
7,312,756
92
Y Swistir
7,283,274
93
Haiti
6,964,549
94
Benin
6,590,782
95
Tajikistan
6,578,681
96
Honduras
6,406,052
97
El Salvador
6,237,662
98
Bwrwndi
6,223,897
99
Israel
Llain Gaza
Glan Orllewinol
Cyfanswm
5,938,093
1,178,119
2,090,713
9,206,925
100
Paraguay
5,734,139
101
Laos
5,635,967
102
Sierra Leone
5,426,618
103
Slofacia
5,414,937
104
Denmarc
Y Lasynys
Ynysoedd Faroe
Cyfanswm
5,368,854
56,352
45,661
5,454,828
105
Libia
5,240,599
106
Y Ffindir
5,211,311
107
Gwlad Iorddonen
5,153,378
108
Togo
5,153,088
109
Papua Guinea Newydd
5,049,055
110
Georgia
4,989,285
111
Nicaragua
4,918,393
112
Kyrgyzstan
4,753,003
113
Turkmenistan
4,603,244
114
Norwy
4,525,116
115
Singapore
4,452,732
116
Moldofa
4,431,570
117
Croatia
4,334,142
118
Eritrea
4,298,269
119
Bosnia a Herzegovina
3,922,205
120
Seland Newydd
Ynysoedd Cook
Tokelau
Cyfanswm
3,864,129
20,611
1,445
3,886,185
121
Gweriniaeth Iwerddon
3,840,838
122
Costa Rica
3,773,057
123
Libanus
3,627,774
124
Lithuania
3,610,535
125
Gweriniaeth Canolbarth Affrica
3,576,884
126
Albania
3,510,484
127
Uruguay
3,360,105
128
Armenia
3,336,100
129
Liberia
3,225,837
130
Gweriniaeth y Congo
2,894,336
131
Panama
2,845,647
132
Mauritania
2,747,312
133
Jamaica
2,665,636
134
Mongolia
2,654,999
135
Oman
2,622,198
136
Emiriaethau Arabaidd Unedig
2,407,460
137
Latfia
2,385,231
138
Lesotho
2,177,062
139
Bhutan
2,049,412
140
Macedonia
2,046,209
141
Kuwait
2,041,961
142
Slofenia
1,930,132
143
Namibia
1,797,677
144
Botswana
1,586,119
145
Estonia
1,415,681
146
Y Gambia
1,411,205
147
Guinéa-Bissau
1,315,822
148
Gabon
1,221,175
149
Mauritius
1,189,825
150
Trinidad a Tobago
1,169,682
151
Gwlad Swasi
1,104,343
152
Fiji
844,330
153
Dwyrain Timor
800,000
154
Qatar
769,152
155
Cyprus
762,887
156
Guyana
697,181
157
Bahrain
645,361
158
Comoros
596,202
159
Equatorial Guinea
486,060
160
Ynysoedd Solomon
480,442
161
Djibouti
460,700
162
Lwcsembwrg
442,972
163
Suriname
433,998
164
Cape Verde
405,163
165
Malta
394,583
166
Brunei
343,653
167
Maldives
310,764
168
Y Bahamas
297,852
169
Gwlad yr Iâ
279,384
170
Barbados
275,330
171
Belize
256,062
172
Vanuatu
192,910
173
Samoa
179,058
174
São Tomé a Príncipe
165,034
175
Saint Lucia
158,178
176
Taleithiau Ffederal Micronesia
134,597
177
Saint Vincent a'r Grenadines
115,942
178
Tonga
104,227
179
Kiribati
94,149
180
Grenada
89,227
181
Seychelles
80,098
182
Ynysoedd Marshall
70,822
183
Dominica
70,786
184
Andorra
67,627
185
Antigua a Barbuda
66,970
186
Saint Kitts a Nevis
38,756
187
Liechtenstein
32,528
188
Monaco
31,842
189
San Marino
27,336
190
Palau
19,092
191
Nauru
12,088
192
Tuvalu
10,991
193
Niue
2,124
194
Dinas y Fatican
890