Rhestr gwledydd yn nhrefn eu dwysedd poblogaeth

Dyma restr o wledydd yn nhrefn eu dwysedd poblogaeth. Dim ond gwladwriaethau sofranaidd a thiriogaethau dibynnol sydd wedi eu cynnwys, felly mae'r ystadegau am wledydd Prydain (e.e. Cymru) wedi eu cynnwys yn rhai'r Deyrnas Unedig gan nad yw'r Cenhedloedd Unedig, ffynhonnell y wybodaeth, yn casglu ystadegau ar wahân.

Trefn	Gwlad neu Rhanbarth	Poblogaeth	Arwynebedd (km²)	Dwysedd (Pob. y km²)
—	Y Byd (ar dir yn unig)	6,464,750,000	134,682,000	48
1	Monaco	35,253	1.49	23,660
2	Macau	460,162	26	17,699
3	Hong Cong	7,040,885	1,099	6,407
4	Singapôr	4,483,900	699.4	6,208
5	Gibraltar	27,921	6	4,654
6	Dinas y Fatican	783	0.44	1,780
7	Malta	401,630	316	1,271
8	Bermiwda	64,174	53	1,211
9	Maldives	329,198	298	1,105
10	Bahrain	726,617	694	1,047
11	Bangladesh	141,822,300	143,998	985
12	Ynysoedd y Sianel (DU)	149,463	195	766
13	Nawrw	13,635	21	649
14	Gweriniaeth Tsieina (Taiwan)	22,894,384	35,980	636
15	Barbados	269,556	430	627
16	Tiriogaethau Palestein	3,702,212	6,020	615
17	Mawrisiws	1,244,663	2,040	610
18	Arwba (Yr Iseldiroedd)	99,468	180	553
–	Mayotte (Ffrainc)	180,610	374	483
19	De Corea	48,846,823	99,538	480
20	San Marino	28,117	61	461
21	Puerto Rico yr Unol Daleithiau (UDA)	3,954,584	8,875	446
22	Twfalw	10,441	26	402
23	Yr Iseldiroedd	16,299,170	41,528	392
24	Martinique (Ffrainc)	395,932	1,102	359
25	Comoros	797,902	2,235	357
26	Libanus	3,576,818	10,400	344
27	Rwanda	9,037,690	26,338	343
28	Ynysoedd Marshall	61,963	181	342
29	Gwlad Belg	10,419,050	30,528	341
30	Japan	128,084,700	377,873	339
31	India	1,103,371,000	3,287,263	336
32	El Salfador	6,880,951	21,041	327
33	Samoa America (UDA)	64,869	199	326
34	Ynysoedd Morwynol yr Unol Daleithiau (UDA)	111,818	347	322
35	Sri Lanca	20,742,910	65,610	316
36	Réunion (France)	785,139	2,510	313
37	Gwam (UDA)	169,635	549	309
38	Haiti	8,527,777	27,750	307
39	Sant Vincent a'r Grenadines	119,051	388	307
40	Israel	6,724,564	22,145	304
41	Sant Lwsia	160,765	539	298
42	Y Philipinau	83,054,480	300,000	277
43	Bwrwndi	7,547,515	27,834	271
44	Guadeloupe (Ffrainc)	448,484	1,705	263
45	Grenada	102,924	344	260
46	Trinidad a Tobago	1,305,236	5,130	254
47	Fietnam	84,238,230	331,689	254
48	Y Deyrnas Unedig	59,667,840	242,900	246
49	Jamaica	2,650,713	10,991	241
50	Yr Almaen	82,689,210	357,022	232
51	Antilles yr Iseldiroedd (Yr Iseldiroedd)	182,656	800	228
52	Liechtenstein	34,521	160	216
53	Pacistan	157,935,100	796,095	198
54	Yr Eidal	58,092,740	301,318	193
55	Gogledd Corea	22,487,660	120,538	187
56	Nepal	27,132,630	147,181	184
57	Antigwa a Barbiwda	81,479	442	184
58	Gweriniaeth Dominica	8,894,907	48,671	183
59	Lwcsembwrg	464,904	2,586	180
60	Seychelles	80,654	455	177
61	Y Swistir	7,252,331	41,284	176
62	Ynysoedd Gogledd Mariana (UDA)	80,801	464	174
63	Ynysoedd Caiman (DU)	45,017	264	171
64	Sant Kitts-Nevis	42,696	261	164
65	São Tomé a Príncipe	156,523	964	162
66	Taleithiau Ffederal Micronesia	110,487	702	157
67	Coweit	2,686,873	17,818	151
68	Ynysoedd y Wyryf (DU)	22,016	151	146
69	Andorra	67,151	468	143
70	Nigeria	131,529,700	923,768	142
71	Tsieina	1,315,844,000	9,596,961	137
72	Tonga	102,311	747	137
73	Ciribati	99,350	726	137
74	Y Gambia	1,517,079	11,295	134
75	Anguilla (DU)	12,205	91	134
76	Ynys Manaw (DU)	76,538	572	134
77	Tsiecia	10,219,600	78,866	130
78	Denmarc	5,430,590	43,094	126
79	Penrhyn Verde	506,807	4,033	126
80	Gwlad Tai	64,232,760	513,115	125
81	Moldofa	4,205,747	33,851	124
82	Gwlad Pwyl	38,529,560	312,685	123
83	Wganda	28,816,230	241,038	120
84	Indonesia	222,781,500	1,904,569	117
85	Gwatemala	12,599,060	108,889	116
86	Tocelaw (Seland Newydd)	1,378	12	115
87	Portwgal	10,494,500	91,982	114
88	Slofacia	5,400,908	49,033	110
89	Ffrainc	60,495,540	551,500	110
90	Albania	3,129,678	28,748	109
91	Malawi	12,883,940	118,484	109
92	Hwngari	10,097,730	93,032	109
93	Togo	6,145,004	56,785	108
94	Serbia	9,396,411	88,361	106
95	Dominica	78,940	751	105
96	Syria	19,043,380	185,180	103
97	Ciwba	11,269,400	110,861	102
98	Armenia	3,016,312	29,800	101
99	Awstria	8,189,444	83,858	98
100	Aserbaijan	8,410,801	86,600	97
101	Slofenia	1,966,814	20,256	97
102	Twrci	73,192,840	783,562	93
103	Ghana	22,112,810	238,533	93
104	Rwmania	21,711,470	238,391	91
105	Cyprus	835,307	9,251	90
106	Sbaen	43,064,190	505,992	85
107	Costa Rica	4,327,228	51,100	85
108	Groeg	11,119,890	131,957	84
109	Croatia	4,551,338	56,538	81
110	Gogledd Macedonia	2,034,060	25,713	79
111	Cambodia	14,071,010	181,035	78
112	Wallis a Futuna (Ffrainc)	15,480	200	77
113	Sierra Leone	5,525,478	71,740	77
114	Wcráin	46,480,700	603,700	77
115	Maleisia	25,347,370	329,847	77
116	Bosnia a Hercegovina	3,907,074	51,197	76
117	Ynysoedd Cook (Seland Newydd)	17,954	236	76
118	Benin	8,438,853	112,622	75
119	Myanmar	50,519,490	676,578	75
120	Yr Aifft	74,032,880	1,001,449	74
121	Qatar	812,842	11,000	74
122	Moroco	31,478,460	446,550	70
123	Ethiopia	77,430,700	1,104,300	70
124	Bwlgaria	7,725,965	110,912	70
125	Irac	28,807,190	438,317	66
126	Samoa	184,984	2,831	65
127	Brwnei	373,819	5,765	65
128	Hondwras	7,204,723	112,088	64
129	Georgia	4,474,404	69,700	64
130	Polynesia Ffrengig (Ffrainc)	256,603	4,000	64
131	Iorddonen	5,702,776	89,342	64
132	Dwyrain Timor	947,064	14,874	64
132	Ynysoedd Turks a Caicos (DU)	26,288	417	63
134	Tiwnisia	10,102,470	163,610	62
135	Eswatini	1,032,438	17,364	59
136	Wsbecistan	26,593,120	447,400	59
137	Senegal	11,658,170	196,722	59
138	Lesotho	1,794,769	30,355	59
139	Gweriniaeth Iwerddon	4,147,901	70,273	59
140	Cenia	34,255,720	580,367	59
141	Y Traeth Ifori	18,153,870	322,463	56
142	Mecsico	107,029,400	1,958,201	55
143	Emiradau Arabaidd Unedig	4,495,823	83,600	54
144	Lithwania	3,431,033	65,300	53
145	Bwrcina Ffaso	13,227,840	274,000	48
146	Belarws	9,755,106	207,600	47
147	Ecwador Ecwador	13,228,420	283,561	47
148	Ffiji	847,706	18,274	46
149	Bhwtan	2,162,546	47,000	46
150	Affganistan	29,863,010	652,090	46
151	Tajicistan	6,506,980	143,100	45
152	Montenegro	630,548	14,026	45
153	Montserrat (DU)	4,488	102	44
154	Gini Bisaw	1,586,344	36,125	44
155	Palaw	19,949	459	43
156	Panama	3,231,502	75,517	43
157	Nicaragwa	5,486,685	130,000	42
158	Iran	69,515,210	1,648,195	42
159	Tansanïa	38,328,810	945,087	41
160	San Helena (DU)	4,918	122	40
161	Colombia	45,600,240	1,138,914	40
162	Iemen	20,974,660	527,968	40
163	De Affrica	47,431,830	1,221,037	39
164	Gini	9,402,098	245,857	38
165	Eritrea	4,401,357	117,600	37
166	Latfia	2,306,988	64,600	36
167	Camerŵn	16,321,860	475,442	34
168	Jibwti	793,078	23,200	34
169	Ynysoedd Faroe (Denmark)	47,017	1,399	34
170	Simbabwe	13,009,530	390,757	33
171	Madagasgar	18,605,920	587,041	32
172	Unol Daleithiau America	298,212,900	9,629,091	31
173	Estonia	1,329,697	45,100	29
174	Liberia	3,283,267	111,369	29
175	Feneswela	26,749,110	912,050	29
176	Cirgistan	5,263,794	199,900	26
177	Laos	5,924,145	236,800	25
178	Mosambic	19,792,300	801,590	25
179	Gweriniaeth Ddemocrataidd y Congo	57,548,740	2,344,858	25
180	Ffrainc	5,769	242	24
181	Y Bahamas	323,063	13,878	23
182	Brasil	186,404,900	8,514,877	22
183	Periw	27,968,240	1,285,216	22
184	Tsile	16,295,100	756,096	22
185	Sweden	9,041,262	449,964	20.0
186	Wrwgwái	3,463,197	175,016	19.8
187	Gini Gyhydeddol	503,519	28,051	18.0
188	Fanwatw	211,367	12,189	17.3
189	Ynysoedd Solomon	477,742	28,896	16.5
190	Y Ffindir	5,249,060	338,145	15.5
191	Sambia	11,668,460	752,618	15.5
192	Paragwâi	6,158,259	406,752	15.1
193	Seland Newydd	4,028,384	270,534	14.9
194	Swdan	36,232,950	2,505,813	14.5
195	Yr Ariannin	38,747,150	2,780,400	13.9
196	Algeria	32,853,800	2,381,741	13.8
197	Ynysoedd Pitcairn (DU)	67	5	13.4
198	Somalia	8,227,826	637,657	12.9
199	Angola	15,941,390	1,246,700	12.8
200	Caledonia Newydd (Ffrainc)	236,838	18,575	12.8
201	Papua Gini Newydd	5,887,138	462,840	12.7
202	Norwy	4,620,275	385,155	12.0
203	Belîs	269,736	22,966	11.7
204	Gweriniaeth y Congo	3,998,904	342,000	11.7
205	Sawdi Arabia	24,573,100	2,149,690	11.4
206	Niger	13,956,980	1,267,000	11.0
207	Mali	13,518,420	1,240,192	10.9
208	Tyrcmenistan	4,833,266	488,100	9.9
209	Rwsia	143,201,600	17,098,242	8.4
210	Bolifia	9,182,015	1,098,581	8.4
211	Oman	2,566,981	309,500	8.3
212	Tsiad	9,748,931	1,284,000	7.6
213	Gweriniaeth Canolbarth Affrica	4,037,747	622,984	6.5
214	Niue (Seland Newydd)	1,445	260	5.6
215	Casachstan	14,825,110	2,724,900	5.4
216	Gabon	1,383,841	267,668	5.2
217	Gaiana	751,218	214,969	3.5
218	Libia	5,853,452	1,759,540	3.3
219	Canada	32,268,240	9,970,610	3.2
220	Botswana	1,764,926	581,730	3.0
221	Mawritania	3,068,742	1,025,520	3.0
222	Gwlad yr Iâ	294,561	103,000	2.9
223	Swrinam	449,238	163,820	2.7
224	Awstralia	20,155,130	7,741,220	2.6
225	Namibia	2,031,252	824,292	2.5
226	Guiana Ffrengig (Ffrainc)	187,056	90,000	2.1
227	Mongolia	2,646,487	1,564,116	1.7
228	Sahara Gorllewinol	341,421	266,000	1.3
229	Ynysoedd y Falkland (DU)	3,060	12,173	0.25
230	Yr Ynys Las (Denmarc)	56,916	2,175,600	0.026