diff --git a/src/features/follow-user/ui/FollowButton.tsx b/src/features/follow-user/ui/FollowButton.tsx
new file mode 100644
index 0000000..db1f412
--- /dev/null
+++ b/src/features/follow-user/ui/FollowButton.tsx
@@ -0,0 +1,64 @@
+import * as React from 'react'
+
+import { Button } from '@/shared/ui/button'
+import { cn } from '@/shared/lib/utils'
+
+type FollowButtonProps = {
+  className?: string
+  defaultIsFollowing?: boolean
+  onToggle?: (nextIsFollowing: boolean) => Promise<void> | void
+}
+
+const FOLLOW_BUTTON_LABEL = {
+  follow: '팔로우',
+  following: '팔로잉',
+}
+
+const FOLLOW_BUTTON_PRIMARY_CLASSNAME =
+  'bg-[#0095f6] text-white hover:bg-[#0095f6]/90'
+
+export function FollowButton({
+  className,
+  defaultIsFollowing = false,
+  onToggle,
+}: FollowButtonProps) {
+  const [isFollowing, setIsFollowing] = React.useState(defaultIsFollowing)
+  const [isPending, startTransition] = React.useTransition()
+
+  const handleClick = () => {
+    const nextIsFollowing = !isFollowing
+
+    startTransition(() => {
+      void (async () => {
+        try {
+          await onToggle?.(nextIsFollowing)
+          setIsFollowing(nextIsFollowing)
+        } catch {
+          return
+        }
+      })()
+    })
+  }
+
+  const label = isFollowing
+    ? FOLLOW_BUTTON_LABEL.following
+    : FOLLOW_BUTTON_LABEL.follow
+
+  return (
+    <Button
+      type="button"
+      aria-pressed={isFollowing}
+      disabled={isPending}
+      onClick={handleClick}
+      className={cn(
+        'h-8 rounded-md px-4 text-sm font-semibold',
+        isFollowing
+          ? 'border border-gray-300 bg-white text-gray-900 hover:bg-gray-50'
+          : FOLLOW_BUTTON_PRIMARY_CLASSNAME,
+        className
+      )}
+    >
+      {label}
+    </Button>
+  )
+}
diff --git a/src/shared/lib/numberFormat.ts b/src/shared/lib/numberFormat.ts
new file mode 100644
index 0000000..0b94491
--- /dev/null
+++ b/src/shared/lib/numberFormat.ts
@@ -0,0 +1,5 @@
+const LOCALE_KO_KR = 'ko-KR'
+
+export function numberFormat(value: number, locale: string = LOCALE_KO_KR) {
+  return value.toLocaleString(locale)
+}
diff --git a/src/widgets/profile-header/ui/ProfileAvatar.tsx b/src/widgets/profile-header/ui/ProfileAvatar.tsx
new file mode 100644
index 0000000..4198060
--- /dev/null
+++ b/src/widgets/profile-header/ui/ProfileAvatar.tsx
@@ -0,0 +1,34 @@
+import { cn } from '@/shared/lib/utils'
+
+import { AVATAR_SIZE_CLASSNAME } from './constants'
+
+type ProfileAvatarProps = {
+  avatarUrl?: string | null
+  nickname: string
+}
+
+export function ProfileAvatar({ avatarUrl, nickname }: ProfileAvatarProps) {
+  const initial = nickname.trim().slice(0, 1).toUpperCase()
+
+  if (avatarUrl) {
+    return (
+      <img
+        src={avatarUrl}
+        alt={`${nickname} 프로필 이미지`}
+        className={cn(AVATAR_SIZE_CLASSNAME, 'rounded-full object-cover')}
+      />
+    )
+  }
+
+  return (
+    <div
+      aria-label={`${nickname} 프로필 이미지`}
+      className={cn(
+        AVATAR_SIZE_CLASSNAME,
+        'flex items-center justify-center rounded-full bg-gray-200 text-5xl font-semibold text-gray-500'
+      )}
+    >
+      {initial || '?'}
+    </div>
+  )
+}
diff --git a/src/widgets/profile-header/ui/ProfileHeader.tsx b/src/widgets/profile-header/ui/ProfileHeader.tsx
new file mode 100644
index 0000000..2045b13
--- /dev/null
+++ b/src/widgets/profile-header/ui/ProfileHeader.tsx
@@ -0,0 +1,61 @@
+import { FollowButton } from '@/features/follow-user/ui/FollowButton'
+import { cn } from '@/shared/lib/utils'
+import { PROFILE_CONTAINER_CLASSNAME } from './constants'
+import { ProfileAvatar } from './ProfileAvatar'
+import { ProfileStat } from './ProfileStat'
+
+interface ProfileHeaderProps {
+  className?: string
+  avatarUrl?: string | null
+  nickname: string
+  bio?: string | null
+  postsCount: number
+  followersCount: number
+  followingCount: number
+  defaultIsFollowing?: boolean
+  onFollowToggle?: (nextIsFollowing: boolean) => Promise<void> | void
+}
+
+export function ProfileHeader({
+  className,
+  avatarUrl,
+  nickname,
+  bio,
+  postsCount,
+  followersCount,
+  followingCount,
+  defaultIsFollowing = false,
+  onFollowToggle,
+}: ProfileHeaderProps) {
+  return (
+    <section className={cn(PROFILE_CONTAINER_CLASSNAME, className)}>
+      <div className="flex gap-8 md:gap-16">
+        <div className="flex w-[180px] justify-center">
+          <ProfileAvatar avatarUrl={avatarUrl} nickname={nickname} />
+        </div>
+
+        <div className="min-w-0 flex-1">
+          <div className="flex flex-wrap items-center gap-4">
+            <h1 className="text-xl font-normal text-gray-900">{nickname}</h1>
+            <FollowButton
+              defaultIsFollowing={defaultIsFollowing}
+              onToggle={onFollowToggle}
+            />
+          </div>
+
+          <div className="mt-6 flex gap-10 text-base">
+            <ProfileStat label="게시물" value={postsCount} />
+            <ProfileStat label="팔로워" value={followersCount} />
+            <ProfileStat label="팔로잉" value={followingCount} />
+          </div>
+
+          {bio ? (
+            <p className="mt-5 text-sm leading-relaxed whitespace-pre-line text-gray-900">
+              {bio}
+            </p>
+          ) : null}
+        </div>
+      </div>
+    </section>
+  )
+}
diff --git a/src/widgets/profile-header/ui/ProfileStat.tsx b/src/widgets/profile-header/ui/ProfileStat.tsx
new file mode 100644
index 0000000..0ba24aa
--- /dev/null
+++ b/src/widgets/profile-header/ui/ProfileStat.tsx
@@ -0,0 +1,15 @@
+import { numberFormat } from '@/shared/lib/numberFormat'
+
+type ProfileStatProps = {
+  label: string
+  value: number
+}
+
+export function ProfileStat({ label, value }: ProfileStatProps) {
+  return (
+    <div className="flex items-baseline gap-1">
+      <span className="font-semibold text-gray-900">{numberFormat(value)}</span>
+      <span className="text-gray-600">{label}</span>
+    </div>
+  )
+}
diff --git a/src/widgets/profile-header/ui/constants.ts b/src/widgets/profile-header/ui/constants.ts
new file mode 100644
index 0000000..2f69924
--- /dev/null
+++ b/src/widgets/profile-header/ui/constants.ts
@@ -0,0 +1,3 @@
+export const PROFILE_CONTAINER_CLASSNAME =
+  'mx-auto w-full max-w-[935px] px-4 py-8'
+export const AVATAR_SIZE_CLASSNAME = 'size-[150px]'