Most populated postal codes

The 20 postal code areas in Oulu with the most residents, and the 20 with the fewest, out of 58 with a published figure.

	Area	Municipality	Postal code	Residents
1	Oulu	Oulu	90540	12,397
2	Oulu	Oulu	90420	10,926
3	Oulu	Oulu	90100	10,298
4	Oulu	Oulu	90650	10,202
5	Kempele	Oulu	90440	9,924
6	Kempele	Oulu	90450	9,402
7	Oulu	Oulu	90500	9,177
8	Oulunsalo	Oulu	90460	8,818
9	Oulu	Oulu	90570	8,504
10	Oulu	Oulu	90520	8,453
11	Haukipudas	Oulu	90830	8,409
12	Oulu	Oulu	90800	8,393
13	Oulu	Oulu	90630	8,151
14	Oulu	Oulu	90230	7,332
15	Oulu	Oulu	90120	7,087
16	Oulu	Oulu	90130	6,955
17	Oulu	Oulu	90250	6,930
18	Muhos	Oulu	91500	6,907
19	Oulu	Oulu	90670	6,671
20	Kiiminki	Oulu	90900	6,518

Least populated postal codes

	Area	Municipality	Postal code	Residents
1	Kylmälänkylä	Oulu	91560	109
2	Pahkakoski	Oulu	91260	114
3	Tannila	Oulu	91240	171
4	Arkala	Oulu	91310	194
5	Ala-Temmes	Oulu	91930	384
6	Jakkukylä	Oulu	91210	432
7	Rova	Oulu	91510	444
8	Oulu	Oulu	90620	483
9	Halosenniemi	Oulu	90860	493
10	Temmes	Oulu	91950	615
11	Oulu	Oulu	90660	617
12	Hailuoto	Oulu	90480	912
13	Oulu	Oulu	90220	987
14	Varjakka	Oulu	90470	1,077
15	Yli-Ii	Oulu	91200	1,128
16	Jokirinne	Oulu	91410	1,136
17	Kontio	Oulu	90910	1,644
18	Haukipudas	Oulu	90840	1,747
19	Lumijoki	Oulu	91980	1,960
20	Oulu	Oulu	90510	1,984

Most populated postal codes — All of Finland

Places with fewer than 100 residents are excluded: a figure drawn from a handful of people carries more uncertainty than the differences being ranked.