KOR2OOL.
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KOREA, IN NUMBERS Population

Osan Population

Monthly resident registration population · KOSIS

MonthlyLatest available: Aug 2026

Current population

255,303

Data period: Aug 2026

YoY change

+3.28%

+8,098 people · Year-over-year

Annual Local Government Budget

KRW 888.48 billion

≈ US$652.69 million

Fiscal year 2026 · Initial budget

General and special accounts · Excludes funds

View exact KRW amount

KRW 888,481,991,000

FX reference date: · ECB · Reference conversion

Source: Ministry of the Interior and Safety · Local Finance 365

Population rank within Gyeonggi#1931 cities and counties
Share of parent population1.85%Gyeonggi
Share of national population0.50%Aug 2026

5-year monthly trend

Osan · people

Population
Aug 2026255,303 people

Monthly resident registration population. Use the month control to inspect each value, or open the data table.

Osan · 5-year monthly trend260,544251,373242,201233,030223,858Sep 2021Apr 2023Dec 2024Aug 2026
View monthly data
Osan · 5-year monthly trend
Data periodPopulation
Aug 2026255,303
Jul 2026254,747
Jun 2026253,590
May 2026252,414
Apr 2026251,395
Mar 2026250,783
Feb 2026250,518
Jan 2026250,128
Dec 2025249,410
Nov 2025248,264
Oct 2025247,468
Sep 2025247,325
Aug 2025247,205
Jul 2025247,034
Jun 2025246,976
May 2025246,630
Apr 2025245,742
Mar 2025244,284
Feb 2025243,326
Jan 2025242,618
Dec 2024242,065
Nov 2024241,295
Oct 2024239,657
Sep 2024238,788
Aug 2024238,524
Jul 2024237,798
Jun 2024236,847
May 2024235,681
Apr 2024234,591
Mar 2024232,965
Feb 2024231,937
Jan 2024230,108
Dec 2023229,656
Nov 2023229,792
Oct 2023229,730
Sep 2023229,780
Aug 2023229,569
Jul 2023229,255
Jun 2023229,099
May 2023229,145
Apr 2023229,121
Mar 2023229,247
Feb 2023229,415
Jan 2023229,704
Dec 2022229,849
Nov 2022229,833
Oct 2022229,821
Sep 2022229,797
Aug 2022230,142
Jul 2022230,181
Jun 2022230,165
May 2022230,011
Apr 2022230,028
Mar 2022229,918
Feb 2022229,909
Jan 2022229,973
Dec 2021229,983
Nov 2021230,165
Oct 2021230,403
Sep 2021230,395
Definition

This population series is based on South Korea's resident registration statistics. Foreign residents are not included in this dataset.

Methodology
Source: KOSIS ↗ · Monthly resident registration populationLast updated: Sep 29, 2026

Other cities and counties in Gyeonggi

SiheungGunpoUiwangHanam