Atty. Mary A. Cosmo

Atty. Mary A. Cosmo

Mary A. Cosmo is a lawyer practicing family, child and family, guardianship and 10 other areas of law.

St. Louis St. Louis 13 yrs experience 13 year
Call (314) 816-0771 Book Appointment

Profile Summary

About Mary A. Cosmo at a glance

Mary A. Cosmo is an Attorney based in St. Louis, Missouri. They have 13+ years of legal experience, licensed to practice since 2013. Their practice focuses on divorce, child custody, trusts, family law, and estate planning. Admitted to practice in Florida (2013) and Missouri (2023). Educated at Florida Coastal School of Law (J.D., 2013). Serands clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mary A. Cosmo is a lawyer practicing family, child and family, guardianship and 10 other areas of law
  • Mary has been licensed for 13 years
  • Mary practices in St. Louis, MO

Practice Areas Explained

Mary A. Cosmo's Areas of Practice

Each practice area below reflects the types of cases Mary A. Cosmo handles, with a brief overview of what that area of law covers.

Divorce

A divorce attorney guides you through property division, spousal support, custody, and the final decree — contested or uncontested.

Mary A. Cosmo is one of 50,487 divorce attorneys indexed nationally. Browse divorce attorneys in Missouri →

Child Custody & Visitation

Mary A. Cosmo is one of 31,241 child custody attorneys indexed nationally. Browse child custody attorneys in Missouri →

Trusts

Mary A. Cosmo is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys in Missouri →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

Mary A. Cosmo is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Missouri →

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

Mary A. Cosmo is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Louis are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about Mary A. Cosmo

Where is Mary A. Cosmo's law office located?
Mary A. Cosmo's law practice is located in St. Louis, Missouri. You can contact the office directly through this profile page.
What practice areas does Mary A. Cosmo handle?
Mary A. Cosmo focuses on divorce, child custody, trusts, family law, estate planning. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Mary A. Cosmo practiced law?
Mary A. Cosmo has 13+ years of legal experience and has been licensed since 2013.
Where did Mary A. Cosmo go to law school?
Mary A. Cosmo earned their education at (J.D., 2013).
How can I contact Mary A. Cosmo for a consultation?
You can contact Mary A. Cosmo directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Florida Coastal School of Law
- 2013

Bar Admissions

Florida
Admitted: 2013
Missouri
Admitted: 2023

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