World Prisons
All prisons

United States

Gratiot Military Prison

Closed 1878Low
Verified 29 May 2026
Fresh · 1d ago

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

For families

How to send mail, money, and visit Gratiot Military Prison

Step-by-step guidance using the United States system — addresses, money services, visit booking, what to bring on your first visit.

Open toolkit
Photograph of Gratiot Military Prison

Gallery

From Wikimedia Commons (CC-BY-SA where not otherwise stated).

  • Absalom Grimes, Major (Confederate).jpg

    Photo by Unknown authorUnknown author via Wikimedia Commons (Public domain)

  • Gratiot Street Prison, 1868. Eighth and Gratiot Street.jpg

    Photo by Emil Boehl via Wikimedia Commons (Public domain)

  • History of Missouri in words of one syllable (1889) (14576903408).jpg

    Photo by Internet Archive Book Images via Wikimedia Commons (No restrictions)

  • Inlaid Brooch Made by Prisoner at Gratiot Street Prison.jpg

    Photo by Unknown authorUnknown author via Wikimedia Commons (Public domain)

  • Letter from George J. Mook, Gratiot St. Prison, to his father, November 16, 1864.jpg

    Photo by Mook, George J. via Wikimedia Commons (Public domain)

  • Letter from George J. Mook, Gratiot St. Prison, to his father, November 17, 1864.jpg

    Photo by Mook, George J. via Wikimedia Commons (Public domain)

  • Letter from George J. Mook, Gratiot Street Prison, St. Louis, Missouri to his sister Emma, November 9, 1864.jpg

    Photo by Mook, George J. via Wikimedia Commons (Public domain)

  • Letter from M.B. Bransford, Gratiot Street Prison, St. Louis, Mo., to Gray and Blanding, May 28, 1863.jpg

    Photo by Bransford, Milford Bard via Wikimedia Commons (Public domain)

Background

The Gratiot Military Prison, commonly known as the Gratiot Street Prison, was a military prison located in St. Louis, and the largest in Missouri at the time.

Source: Wikipedia article lead, CC-BY-SA.

Capacity

—

Current population

—

Occupancy

—

Year opened

1861

Closed 1878

Facility profile

Operator

United States Army

Population held

Mixed/unknown

Opened

1861

Region

—

Security level

—

Death-row facility

No

Conditions

No conditions summary available yet.

Visiting

No visiting information available.

Mailing

No mailing information available.

Practical info

Contact the operator's website for inmate-specific procedures.

Known issues

No major issues documented in our database.

Contact & address

No public contact details available.

Conditions Risk Score

Derived signal — not a judgement. How it's calculated

—
Insufficient data
We don't have enough public data on this facility to score it. Have something to add? Send us a correction.

Data completeness

20%

How many of our profile fields are populated. We surface this so families and researchers know the limits.

Sources