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 698

Mason City, IA Social Security Office

The Social Security office in Mason City is at 625 Village Green Dr SW, Mason City, IA 50401. Phone: (866) 365-6708. Hours: Monday to Friday, 9:00 AM - 4:00 PM. If you appeal a disability decision, your hearing goes to the Des Moines hearing office (about 7.8 months on average).

Address, phone and office hours

Address625 Village Green Dr SW
Mason City, IA 50401
Phone(866) 365-6708
Fax(833) 515-0435
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 code698

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

Appealing a disability decision from the Mason City office

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

Hearing officeDes Moines, IA(877) 628-6577 Ext. 20826
Average processing time7.8 mo238 days · national 8.6 mo
Approval rate at hearings53%FY 2026 · national 58%

Before the hearing, the medical decision is made by Disability Determination Services 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 Mason City Social Security office?

The Mason City, IA Social Security office phone number is (866) 365-6708 and its fax is (833) 515-0435. SSA's national line is 1-800-772-1213.

What are the hours of the Mason City 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 Mason City?

625 Village Green Dr SW, Mason City, IA 50401.

Where are disability appeal hearings held for the Mason City office?

SSA lists the Mason City field office among those served by the Des Moines Hearing Office (Des Moines, IA). Its average processing time is about 7.8 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.