IJsland kent slechts een decentrale bestuurslaag, de gemeente, 79 in totaal, verdeeld over 8 regio's zonder bestuurlijke functie. Dit is de Lijst van IJslandse gemeenten.

Positie (+/−)	Naam	Inwoners (1-12-2006)	Verandering sinds 1-12-2005	%	Verandering sinds 1-12-1996	%
1 ()	Reykjavik	116.446	+1.646	+1,43%	+10.482	+9,89%
2 ()	Kópavogur	27.536	+1.068	+4,04%	+8.986	+48,44%
3 ()	Hafnarfjörður	23.674	+1.223	+5,45%	+5.739	+32%
4 ()	Akureyri	16.822	+86	+0,51%	+1.553	+10,17%
5 ()	Reykjanesbær	11.928	+582	+5,13%	+1.576	+15,22%
6 ()	Garðabær	9.529	+106	+1,12%	+1.698	+21,68%
7 ()	Mosfellsbær	7.501	+344	+4,81%	+2.525	+50,74%
8 ()	Árborg	7.280	+319	+4,58%	+1.887	+34,99%
9 ()	Akranes	5.955	+173	+2,99%	+881	+17,36%
10 ()	Fjarðabyggð	5.705	+861	+17,77%	+1.308	+29,75%
11 ( 4)	Fljótsdalshérað	4.644	+739	+18,92%	+1.798	+63,18%
12 ( 1)	Seltjarnarnes	4.467	+6	+0,13%	−92	−2,02%
13 ( 1)	Ísafjarðarbær	4.098	−11	−0,27%	−421	−9,32%
14 ( 1)	Skagafjörður	4.078	−32	−0,78%	−353	−7,97%
15 ( 3)	Vestmannaeyjar	4.075	−100	−2,40%	−674	−14,19%
16 ()	Borgarbyggð	3.713	+88	+2,43%	+401	+12,11%
17 ()	Norðurþing	3.023	−8	−0,26%	−494	−14,05%
18 ()	Grindavík	2.697	+73	+2,78%	+528	+24,34%
19 ( 2)	Álftanes	2.287	+95	+4,35%	+993	+77,28%
20 ( 1)	Fjallabyggð	2.261	−37	−1,61%	−575	−20,28%
21 ( 1)	Hveragerði	2.189	+100	+4,79%	+520	+31,16%
22 ( 2)	Hornafjörður	2.186	−3	−0,14%	−255	−10,45%
23 ()	Dalvíkurbyggð	1.966	+39	+2,02%	−120	−10,45%
24 ()	Ölfus	1.854	+55	+3,06%	+292	+18,69%
25 ()	Snæfellsbær	1.702	−41	−2,35%	−66	−3,73%
26 ()	Rangárþing eystra	1.694	+22	+1,32%	+8	+0,47%
27 ()	Sandgerði	1.663	+128	+8,34%	+339	+25,60%
28 ()	Rangárþing ytra	1.526	+67	+4,59%	+99	+6,94%
29 ()	Garður	1.486	+110	+7,99%	+346	+30,35%
30 ()	Húnaþing vestra	1.163	−6	−0,51%	−170	−12,72%
31 ()	Stykkishólmur	1.149	−16	−1,37%	−126	−9,88%
32 ()	Vogar	1.106	+88	+8,64%	+436	+65,07%
33 ()	Eyjafjarðarsveit	998	+20	+2,04%	+64	+6,85%
34 ()	Grundarfjarðarbær	954	−20	−2,05%	+10	+1,06%
35 ()	Vesturbyggð	937	−28	−2,90%	−360	−27,76%
36 ()	Bláskógabyggð	921	0	0%	+128	+16,14%
37 ()	Bolungarvík	905	−13	−1,42%	−192	−17,50%
38 ()	Blönduós	892	−11	−1,22%	−171	−16,09%
39 ()	Hrunamannahreppur	786	+19	+2,48%	+119	+17,84%
40 ()	Seyðisfjörður	726	−5	−0,68%	−105	−12,64%
41 ()	Vopnafjarðarhreppur	712	−13	−1,79%	−160	−18,35%
42 ( 1)	Þingeyjarsveit	699	+13	+1,90%	−131	−15,78%
43 ( 1)	Dalabyggð	682	−33	−4,62%	−146	−17,63%
44 ()	Hvalfjarðarsveit	616	+13	+2,16%	+62	+11,19%
45 ( 2)	Flóahreppur	551	+25	+4,75%	+26	+4,95%
46 ( 1)	Höfðahreppur	534	−11	−2,02%	−122	−18,60%
47 ( 1)	Skeiða- og Gnúpverjahreppur	527	+6	+1,15%	−30	−5,39%
48 ( 11)	Fljótsdalshreppur	524	+169	+47,61%	+415	+380,73%
49 ( 3)	Langanesbyggð	518	−24	−4,43%	−96	−15,64%
50 ()	Strandabyggð	507	+7	+1,4%	−155	−23,41%
51 ( 2)	Mýrdalshreppur	496	−7	−1,39%	−41	−7,64%
52 ( 1)	Skaftárhreppur	485	−5	−1,02%	−116	−19,30%
53 ( 1)	Húnavatnshreppur	463	−8	−1,7%	−62	−11,81%
54 (1)	Djúpavogshreppur	463	+5	+1,09%	−95	−17,03%
55 ()	Hörgárbyggð	411	+12	+3,01%	+28	+7,31%
56 ( 2)	Skútustaðahreppur	410	−18	−4,21%	−62	−13,14%
57 ( 1)	Svalbarðsstrandarhreppur	381	−1	−0,26%	+42	+12,39%
58 ()	Grímsnes- og Grafningshreppur	375	+19	+5,34%	+56	+17,55%
59 ( 2)	Grýtubakkahreppur	368	+2	+0,55%	+3	+0,82%
60 ()	Tálknafjarðarhreppur	292	−5	−1,68%	−39	−11,78%
61 ()	Aðaldælahreppur	257	+1	+0,39%	−58	−18,41%
62 ()	Reykhólahreppur	251	−4	−1,57%	−83	−24,85%
63 ( 1)	Breiðdalshreppur	244	+12	+4,92%	−62	−20,26%
64 ( 1)	Súðavíkurhreppur	229	−6	−2,62%	−71	−23,67%
65 ()	Akrahreppur	222	−3	−1,33%	0	0%
66 ( 2)	Kjósarhreppur	181	+19	+11,73%	+40	+28,37%
67 ( 1)	Arnarneshreppur	176	+2	+1,15%	−30	−14,56%
68 ( 1)	Ásahreppur	158	−6	−3,66%	+18	+12,86%
69 ()	Borgarfjarðarhreppur	146	0	0%	−32	−17,98%
70 ()	Eyja- og Miklaholtshreppur	140	+3	+2,19%	+3	+2,19%
71 ( 1)	Svalbarðshreppur	106	−3	−2,75%	−12	−10,17%
72 ( 1)	Kaldrananeshreppur	101	−11	−9,82%	−34	−25,19%
73 ()	Bæjarhreppur	100	−5	−4,76%	−6	−5,66%
74 ()	Grímseyjarhreppur	99	−3	−2,94%	−3	−2,94%
75 ()	Skagabyggð	96	−3	−3,03%	+3	+3,23%
76 ( 1)	Tjörneshreppur	60	−3	−4,76%	−23	−27,71%
77 ( 1)	Helgafellssveit	58	+3	+5,45%	−10	−14,71%
78 ( 2)	Skorradalshreppur	56	−8	−12,50%	+9	+19,15%
79 ()	Árneshreppur	50	0	0%	−34	−40,40%
Totaal	IJsland	307.261	+7857	+2,56%	+37534	+13,92%