Missouri · Checked Against SSA's Locator October 1, 2026

Social Security Offices Near O'Fallon, MO

Where Is the Social Security Office Nearest O'Fallon, MO?

SSA assigns all 2 ZIP codes in O'Fallon, MO to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, about 7.2 miles away, phone (877) 405-3570, open Monday to Friday, 9:00 AM to 4:00 PM.

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Closest Social Security Offices to O'Fallon, MO

Straight-line distance from the center of O'Fallon (U.S. Census Gazetteer) to each office's address (U.S. Census Bureau geocoder). Office hours and phone numbers from SSA's office data, checked against SSA's Office Locator on October 1, 2026; confirm with SSA's Office Locator before you go.

Map of Social Security Offices Near O'Fallon

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Which Social Security Office Serves Your ZIP Code in O'Fallon?

SSA assigns all 2 ZIP codes in O'Fallon to the St. Peters Social Security Office in Saint Peters. SSA assigns offices by ZIP code, so the office to use is the one listed for your ZIP.

Social Security office assigned to each ZIP code in O'Fallon
ZIP codeOffice SSA assignsDistance
63366St. Peters Social Security Office for ZIP code 633668.6 miles
63368St. Peters Social Security Office for ZIP code 633688.1 miles

ZIP codes 63366 and 63368 go to the St. Peters Social Security Office, 4800 Executive Ctr Pky, Saint Peters.

Assigned offices from SSA's Office Locator, looked up by ZIP code on October 1, 2026. ZIP codes are those whose area overlaps O'Fallon (U.S. Census Bureau, 2020 ZIP Code Tabulation Areas). Distance is straight-line, from the center of the ZIP code to the office.

Social Security Offices Near Areas Around O'Fallon

Where people in nearby communities go, and how far it is. Each area's office is the one SSA assigns to its ZIP codes.

Social Security Office Near St. Charles

St. Charles is about 11 miles east of central O'Fallon. SSA assigns its ZIP codes (63301 and 63303) to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near St. Charles

Social Security Office Near Chesterfield

Chesterfield is about 12 miles southeast of central O'Fallon. SSA assigns its ZIP codes (63005 and 63017) to the St. Louis West County Social Security Office at 1215 Fern Ridge Pkwy, STE 100, Creve Coeur, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Chesterfield

Social Security Office Near St. Peters

St. Peters is about 6.3 miles east of central O'Fallon. SSA assigns its ZIP code, 63376, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near St. Peters

Social Security Office Near Dardenne Prairie

Dardenne Prairie is about 3.0 miles south of central O'Fallon. SSA assigns its ZIP code, 63368, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Dardenne Prairie

Social Security Office Near Lake St. Louis

Lake St. Louis is about 3.5 miles west of central O'Fallon. SSA assigns its ZIP code, 63367, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Lake St. Louis

Social Security Office Near Saint Peters

Saint Peters is about 6.3 miles east of central O'Fallon. SSA assigns its ZIP code, 63376, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Saint Peters

Social Security Office Near Wentzville

Wentzville is about 8.4 miles west of central O'Fallon. SSA assigns its ZIP code, 63385, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Wentzville

Social Security Office Near Weldon Spring

Weldon Spring is about 6.4 miles southeast of central O'Fallon. SSA assigns its ZIP code, 63304, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

Social Security Office Near St. Paul

St. Paul is about 4.6 miles north of central O'Fallon. SSA assigns its ZIP code, 63366, to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

Social Security Office Near Cottleville

Cottleville is about 4.1 miles southeast of central O'Fallon. SSA assigns its ZIP codes (63304 and 63376) to the St. Peters Social Security Office at 4800 Executive Ctr Pky, Saint Peters, open Monday to Friday, 9:00 AM to 4:00 PM.

How to Get an Appointment at the St. Peters Social Security Office

SSA asks you to make an appointment before you visit an office. You can schedule one online on SSA's appointment page by answering a few questions; the appointment may be by phone or in person, and you can change or cancel it from the confirmation email or text.

To book by phone, call the St. Peters Social Security Office at (877) 405-3570, or SSA's national number, 1-800-772-1213 (TTY 1-800-325-0778), Monday through Friday, 8 a.m. to 7 p.m. local time. Help is available in English, Spanish and other languages.

See office hours and appointments for the best times to call and visit.

Can You Skip the Trip?

You can often replace a card, update your address or get a benefit letter online with a my Social Security account. If you need to go in, check what to bring.

Social Security Offices Near Other Missouri Cities

Frequently Asked Questions

Where Is the Social Security Office in O'Fallon?

There isn't an office in O'Fallon, MO itself. The closest is the St. Peters Social Security Office, 4800 Executive Ctr Pky, Saint Peters, MO 63376, about 7.2 miles away.

Which Social Security Office Serves My ZIP Code in O'Fallon?

SSA assigns all 2 ZIP codes in O'Fallon to the St. Peters Social Security Office in Saint Peters. SSA assigns offices by ZIP code, and the assigned office isn't always the closest one. Look up your ZIP code in the table on this page or in SSA's Office Locator.

What Are Social Security Office Hours Near O'Fallon?

The St. Peters Social Security Office is open Monday to Friday, 9:00 AM to 4:00 PM, according to SSA's office data (checked against SSA's Office Locator on October 1, 2026). Offices close on weekends and federal holidays.

What Is the Phone Number for the Social Security Office Near O'Fallon?

SSA lists (877) 405-3570 for the St. Peters Social Security Office. SSA's national number is 1-800-772-1213.

How Do I Make an Appointment at the Social Security Office Near O'Fallon?

Schedule online on SSA's appointment page, where the appointment may be by phone or in person, or call the St. Peters Social Security Office at (877) 405-3570 or SSA at 1-800-772-1213 (TTY 1-800-325-0778), Monday through Friday, 8 a.m. to 7 p.m. local time. SSA asks you to make an appointment before visiting an office.

Every Social Security office in Missouri

Sources

  1. Social Security Administration, field office and resident station data (updated March 9, 2026)
  2. SSA Office Locator (offices and ZIP code assignments, checked October 1, 2026)
  3. U.S. Census Bureau: geocoder, 2023 Gazetteer files and 2020 ZIP Code Tabulation Area relationship files
  4. SSA: Make an appointment
  5. SSA: Contact by phone
  6. SSA: Office locator guidance (appointments and Card Centers)

Independent site, not affiliated with the Social Security Administration. Office addresses, phone numbers and hours come from SSA's public office data. To apply for benefits or manage your record, go to SSA directly at ssa.gov.