The Social Security Directory
Independent guide built from public SSA data. Not affiliated with the Social Security Administration. Apply, appeal and check your case only on ssa.gov.

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Social Security field office · code 545

Oshkosh, WI Social Security Office

The Social Security office in Oshkosh is at 400 City Center Ste B, Oshkosh, WI 54901. Phone: (877) 445-0834. Hours: Monday to Friday, 9:00 AM - 4:00 PM. If you appeal a disability decision, your hearing goes to the Milwaukee hearing office (about 8.6 months on average).

Address, phone and office hours

Address400 City Center Ste B
Oshkosh, WI 54901
Phone(877) 445-0834
Fax(833) 596-0595
Monday9:00 AM - 4:00 PM
Tuesday9:00 AM - 4:00 PM
Wednesday9:00 AM - 4:00 PM
Thursday9:00 AM - 4:00 PM
Friday9:00 AM - 4:00 PM
Saturday–SundayClosed
SSA office code545

Address, phone and hours from SSA's official field office file. Offices close on federal holidays.

Appealing a disability decision from the Oshkosh office

SSA lists the Oshkosh field office among the offices served by the Milwaukee Hearing Office. That is where an administrative law judge will hear your case if your claim is denied at reconsideration.

Hearing officeMilwaukee, WI(866) 495-0039
Average processing time8.6 mo261 days · national 8.6 mo
Approval rate at hearings51%FY 2026 · national 58%

Before the hearing, the medical decision is made by Disability Determination Bureau. Read how to appeal a denial (60-day deadline) and what happens at the hearing.

What you can do at this office

  • Apply for retirement, disability (SSDI), SSI, survivors and spouse benefits. Social Security card applications too.
  • Replace a Social Security card or update your name.
  • Request a reconsideration or a hearing if your claim was denied (forms).
  • Report changes that affect your benefits and get benefit verification letters.

Many of these services can be done online at ssa.gov or by calling 1-800-772-1213. See how to schedule an appointment.

Frequently asked questions

What is the phone number of the Oshkosh Social Security office?

The Oshkosh, WI Social Security office phone number is (877) 445-0834 and its fax is (833) 596-0595. SSA's national line is 1-800-772-1213.

What are the hours of the Oshkosh Social Security office?

Monday to Friday, 9:00 AM - 4:00 PM, according to SSA. It is closed on weekends and federal holidays.

Where is the Social Security office in Oshkosh?

400 City Center Ste B, Oshkosh, WI 54901.

Where are disability appeal hearings held for the Oshkosh office?

SSA lists the Oshkosh field office among those served by the Milwaukee Hearing Office (Milwaukee, WI). Its average processing time is about 8.6 months.

Do I need an appointment?

SSA says that if you need in-person help, you must make an appointment to visit a local office. Call the office or 1-800-772-1213 (8:00 a.m. to 7:00 p.m. local time, Monday to Friday). Many services are also available online at ssa.gov.