Index: usr.bin/netstat/inet.c
===================================================================
--- usr.bin/netstat/inet.c
+++ usr.bin/netstat/inet.c
@@ -341,6 +341,9 @@
 				xo_emit("  {T:/%8.8s} {T:/%5.5s}",
 				    "flowid", "ftype");
 			}
+			if (cflag)
+				xo_emit(" {T:/%-*.*s}", TCP_CA_NAME_MAX,
+				    TCP_CA_NAME_MAX, "CC");
 			if (Pflag)
 				xo_emit(" {T:/%s}", "Log ID");
 			xo_emit("\n");
@@ -514,9 +517,15 @@
 			    inp->inp_flowid,
 			    inp->inp_flowtype);
 		}
-		if (istcp && Pflag)
-			xo_emit(" {:log-id/%s}", tp->xt_logid[0] == '\0' ?
-			    "-" : tp->xt_logid);
+		if (istcp) {
+			if (cflag)
+				xo_emit(" {:cc/%-*.*s}", TCP_CA_NAME_MAX,
+				    TCP_CA_NAME_MAX, tp->xt_cc);
+			if (Pflag)
+				xo_emit(" {:log-id/%s}",
+				    tp->xt_logid[0] == '\0' ?
+				    "-" : tp->xt_logid);
+		}
 		xo_emit("\n");
 		xo_close_instance("socket");
 	}
Index: usr.bin/netstat/main.c
===================================================================
--- usr.bin/netstat/main.c
+++ usr.bin/netstat/main.c
@@ -205,6 +205,7 @@
 int	aflag;		/* show all sockets (including servers) */
 static int	Bflag;		/* show information about bpf consumers */
 int	bflag;		/* show i/f total bytes in/out */
+int	cflag;		/* show congestion control */
 int	dflag;		/* show i/f dropped packets */
 int	gflag;		/* show group (multicast) routing or stats */
 int	hflag;		/* show counters in human readable format */
@@ -249,7 +250,7 @@
 	if (argc < 0)
 		exit(EXIT_FAILURE);
 
-	while ((ch = getopt(argc, argv, "46AaBbdF:f:ghI:iLlM:mN:noPp:Qq:RrSTsuWw:xz"))
+	while ((ch = getopt(argc, argv, "46AaBbcdF:f:ghI:iLlM:mN:noPp:Qq:RrSTsuWw:xz"))
 	    != -1)
 		switch(ch) {
 		case '4':
@@ -277,6 +278,9 @@
 			break;
 		case 'b':
 			bflag = 1;
+			break;
+		case 'c':
+			cflag = 1;
 			break;
 		case 'd':
 			dflag = 1;
Index: usr.bin/netstat/netstat.h
===================================================================
--- usr.bin/netstat/netstat.h
+++ usr.bin/netstat/netstat.h
@@ -41,6 +41,7 @@
 extern int	Aflag;	/* show addresses of protocol control block */
 extern int	aflag;	/* show all sockets (including servers) */
 extern int	bflag;	/* show i/f total bytes in/out */
+extern int	cflag;	/* show congestion control */
 extern int	dflag;	/* show i/f dropped packets */
 extern int	gflag;	/* show group (multicast) routing or stats */
 extern int	hflag;	/* show counters in human readable format */
Index: usr.bin/netstat/netstat.1
===================================================================
--- usr.bin/netstat/netstat.1
+++ usr.bin/netstat/netstat.1
@@ -28,7 +28,7 @@
 .\"	@(#)netstat.1	8.8 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd July 21, 2020
+.Dd September 12, 2020
 .Dt NETSTAT 1
 .Os
 .Sh NAME
@@ -39,7 +39,7 @@
 .Bl -tag -width "netstat"
 .It Nm
 .Op Fl -libxo
-.Op Fl 46AaLnPRSTWx
+.Op Fl 46AacLnPRSTWx
 .Op Fl f Ar protocol_family | Fl p Ar protocol
 .Op Fl M Ar core
 .Op Fl N Ar system
@@ -111,7 +111,7 @@
 .It Xo
 .Bk -words
 .Nm
-.Op Fl 46AaLnRSTWx
+.Op Fl 46AacLnRSTWx
 .Op Fl f Ar protocol_family | Fl p Ar protocol
 .Op Fl M Ar core
 .Op Fl N Ar system
@@ -172,6 +172,8 @@
 .It Fl a
 Show the state of all sockets;
 normally sockets used by server processes are not shown.
+.It Fl c
+Show the congestion control of TCP sockets.
 .It Fl L
 Show the size of the various listen queues.
 The first count shows the number of unaccepted connections,