diff --git a/benchmarks/iperf3/Makefile b/benchmarks/iperf3/Makefile
index b799b1b3f118..3d774b592b0e 100644
--- a/benchmarks/iperf3/Makefile
+++ b/benchmarks/iperf3/Makefile
@@ -1,41 +1,40 @@
 PORTNAME=	iperf
-DISTVERSION=	3.20
-PORTREVISION=	1
+DISTVERSION=	3.21
 CATEGORIES=	benchmarks
 MASTER_SITES=	https://github.com/esnet/${PORTNAME}/releases/download/${DISTVERSION}/ \
 		https://downloads.es.net/pub/${PORTNAME}/
 PKGNAMESUFFIX=	3
 
 MAINTAINER=	bmah@FreeBSD.org
 COMMENT=	Improved tool to measure TCP and UDP bandwidth
 WWW=		https://software.es.net/iperf/
 
 LICENSE=	BSD3CLAUSE MIT
 LICENSE_COMB=	multi
 
 USES=		cpe libtool ssl
 CPE_VENDOR=	iperf_project
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 PORTDOCS=	README.md RELNOTES.md
 
 # Set ${DOCSDIR} to avoid conflict with benchmarks/iperf
 DOCSDIR=	${PREFIX}/share/doc/${PKGBASE}
 
 OPTIONS_DEFINE=	DOCS STATIC
 OPTIONS_SUB=	yes
 
 STATIC_CONFIGURE_ENABLE=	static
 
 post-patch:
 # Don't build stuff that we're not going to install.  Among other
 # things this means we're not going to try to build profiled objects
 # and/or executables.
 	@${REINPLACE_CMD} -e '/^PROGRAMS /s/\$$(noinst_PROGRAMS)//' ${WRKSRC}/src/Makefile.in
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC} && ${INSTALL_DATA} ${PORTDOCS} ${STAGEDIR}${DOCSDIR})
 
 .include <bsd.port.mk>
diff --git a/benchmarks/iperf3/distinfo b/benchmarks/iperf3/distinfo
index fb0175c8caca..63aabafb9546 100644
--- a/benchmarks/iperf3/distinfo
+++ b/benchmarks/iperf3/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1763163198
-SHA256 (iperf-3.20.tar.gz) = 3acc572d1ecca4e0b20359c7bf0132ddc80d982efeee20c86f6726a9a6094388
-SIZE (iperf-3.20.tar.gz) = 698649
+TIMESTAMP = 1776039890
+SHA256 (iperf-3.21.tar.gz) = 656e4405ebd620121de7ceca3eaf43a88f79ea1b857d041a6a0b1314801acdd8
+SIZE (iperf-3.21.tar.gz) = 708031
diff --git a/benchmarks/iperf3/files/patch-RELNOTES.md b/benchmarks/iperf3/files/patch-RELNOTES.md
deleted file mode 100644
index cb9a7c97d6ba..000000000000
--- a/benchmarks/iperf3/files/patch-RELNOTES.md
+++ /dev/null
@@ -1,18 +0,0 @@
-diff --git a/RELNOTES.md b/RELNOTES.md
-index cf5bd19..5bb89a5 100644
---- RELNOTES.md.orig
-+++ RELNOTES.md
-@@ -30,10 +30,10 @@ releases, including iperf-3.19.1.
-       flag (PR #1903)
- 
-     * Sends with `--zerocopy` are now properly seeded with data
--      instead of being all-zeroes. (PR #1909)
-+      instead of being all-zeroes. (PR #1949)
- 
--    * The `--time` flag is now allowed on the iperf3 server to impose
--      a maximum duration on timed tests. (PR #1684, PR #1931)
-+    * The `--server-max-duration` flag is now allowed on the iperf3 server to impose
-+      a maximum duration on timed tests. (PR #1684)
- 
-     * The `--rcv-timeout` flag is now ignored for `--bidir`
-       tests. This change prevents premature termination of