diff --git a/dev-tex/biblatex/Manifest b/dev-tex/biblatex/Manifest
index cf276a78e657d..de15ef299302a 100644
--- a/dev-tex/biblatex/Manifest
+++ b/dev-tex/biblatex/Manifest
@@ -1 +1,2 @@
 DIST biblatex-3.20.tds.tgz 19035703 BLAKE2B fbe1906a0e2aed64750f4dd95038ae9336b38ab936521545eafb79c22f1e19ad22accd078f483abc4c2b8baef83ac4763e6cea5942505ab0f4a9d342f4bf0aa3 SHA512 55bfa626850e6cec31abb2c99ce82d4e9aeb0120101815897e367837a5d679c27e18a204e2270b5b6858eb64a95c459f9ff3c2c0e6245905fa82ab979a5048e1
+DIST biblatex-3.21.tds.tgz 19431984 BLAKE2B 15a1ea0e96a16da47c89437260c1782cedccc62d02c6ace6db1a4168a8955dafda7d8e53ed2570460f18a9c9cb7a909f2e393084ba43eb342c2315d1fd0572db SHA512 1d950a012a642f99124a7b67b3ff44bfa6e75c5791d269b00a422dd7d87d72edf6debe7649cca4653b0b6e61225be840332fb3dc1d26786565d2355421e222c3
diff --git a/dev-tex/biblatex/biblatex-3.21.ebuild b/dev-tex/biblatex/biblatex-3.21.ebuild
new file mode 100644
index 0000000000000..cfe11a1ad2cdd
--- /dev/null
+++ b/dev-tex/biblatex/biblatex-3.21.ebuild
@@ -0,0 +1,56 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit latex-package
+
+DESCRIPTION="Reimplementation of the bibliographic facilities provided by LaTeX"
+HOMEPAGE="https://www.ctan.org/tex-archive/macros/latex/contrib/biblatex https://github.com/plk/biblatex/"
+SRC_URI="https://downloads.sourceforge.net/${PN}/${P}.tds.tgz"
+
+S="${WORKDIR}"
+
+LICENSE="LPPL-1.3"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+
+IUSE="+biber doc examples"
+
+DEPEND="
+	dev-texlive/texlive-bibtexextra
+	dev-texlive/texlive-latexextra
+	dev-texlive/texlive-plaingeneric
+"
+RDEPEND="${DEPEND}"
+# biblatex and biber must always have compatible versions
+PDEPEND="biber? ( ~dev-tex/biber-2.$(ver_cut 2) )"
+BDEPEND="
+	doc? (
+		dev-texlive/texlive-luatex
+		media-fonts/juliamono
+		virtual/latex-base
+	)
+"
+
+TEXMF=/usr/share/texmf-site
+
+src_prepare() {
+	default
+}
+
+src_install() {
+	insinto "${TEXMF}"
+	doins -r bibtex tex
+
+	dodoc doc/latex/biblatex/{README,CHANGES.md}
+	if use doc; then
+		pushd doc/latex/biblatex >/dev/null || die
+		LATEX_ENGINE=lualatex latex-package_src_doinstall doc
+		popd >/dev/null || die
+	fi
+
+	if use examples ; then
+		dodoc -r doc/latex/biblatex/examples
+	fi
+}