United States.
The Sixth Amendment to the United States Constitution provides:
In all criminal prosecutions, the accused shall enjoy the right…to have the Assistance of Counsel for his defense.
The assistance of counsel clause includes, as relevant here, five distinct rights: the right to counsel of choice, the right to appointed counsel, the right to conflict-free counsel, the effective assistance of counsel, and the right to represent oneself pro se.
A defendant does not have a Sixth Amendment right to counsel in any civil proceeding, including a deportation hearing (even though deportability is often a collateral consequence of criminal conviction). However, as described below, there are certain civil proceedings where parties have a right to appointed counsel; such a right is pursuant to the Fourteenth Amendment's due process or equal protection clause, a state constitution's due process or equal protection clause, or a federal/state statute.
Subject to considerations such as conflicts of interest, scheduling, counsel's authorization to practice law in the jurisdiction, and counsel's willingness to represent the defendant (whether pro bono or for a fee), criminal defendants have a right to be represented by counsel of their choice. The remedy for erroneous deprivation of first choice counsel is automatic reversal.
Appointment of counsel for indigent litigants.
A criminal defendant unable to afford counsel has the right to appointed counsel at the government's expense. While the Supreme Court recognized this right gradually, it currently applies in all federal and state criminal proceedings where the defendant faces authorized imprisonment greater than one year (a "felony") or where the defendant is actually imprisoned, including imposition of a suspended incarceration sentence of any length.
Criminal defendants in misdemeanor cases do not have a right to appointed counsel if they are not sentenced to actual imprisonment, even if that conviction is later used to enhance sentencing for another crime, or even if the revocation of probation may result in actual imprisonment (although for parole revocation, the court evaluates the right to counsel on a case-by-case-basis). Nor does the defendant have the right to appointed counsel to raise frivolous arguments on direct appeal, or to raise any arguments on habeas or other collateral appeal, even if facing execution. One federal court has held that a state court must appoint counsel upon imposition of probation, regardless of whether a separate suspended sentence of incarceration is also imposed and regardless of whether counsel is provided for any subsequent probation revocation proceeding, while others have held or suggested that if probation is imposed without counsel, then a person may not be subsequently jailed for violation of that probation.
