Can I represent myself in a United States federal court?
Answered for: US
the parties may plead and conduct their own cases personally
For an individual's own case in a United States federal court, 28 U.S.C. § 1654 permits appearing personally or through counsel, subject to the court's rules. This is a federal-court provision; check the court's self-help instructions and applicable rules before filing.
This answer is true in US and nowhere else on this site. Another jurisdiction is another answer, or an honest gap: see what has been read for US.