diff --git a/frontend/src/components/Common/GlobalSearch.tsx b/frontend/src/components/Common/GlobalSearch.tsx
new file mode 100644
index 0000000..24222d2
--- /dev/null
+++ b/frontend/src/components/Common/GlobalSearch.tsx
@@ -0,0 +1,294 @@
+import {
+  Box,
+  Divider,
+  Flex,
+  HStack,
+  Icon,
+  Input,
+  InputGroup,
+  InputLeftElement,
+  Spinner,
+  Text,
+  VStack,
+  useColorModeValue,
+} from "@chakra-ui/react"
+import { useQuery, useQueryClient } from "@tanstack/react-query"
+import { useNavigate } from "@tanstack/react-router"
+import { useMemo, useState } from "react"
+import { FaSearch } from "react-icons/fa"
+import {
+  FiBriefcase,
+  FiHome,
+  FiSettings,
+  FiUser,
+  FiUsers,
+} from "react-icons/fi"
+import type { IconType } from "react-icons/lib"
+
+import {
+  type ItemPublic,
+  ItemsService,
+  type UserPublic,
+  UsersService,
+} from "../../client"
+
+type SearchPath = "/" | "/items" | "/settings" | "/admin"
+
+type SearchResult = {
+  detail: string
+  icon: IconType
+  id: string
+  label: string
+  to: SearchPath
+  type: string
+}
+
+const navigationResults: SearchResult[] = [
+  {
+    detail: "Overview and account summary",
+    icon: FiHome,
+    id: "route-dashboard",
+    label: "Dashboard",
+    to: "/",
+    type: "Page",
+  },
+  {
+    detail: "Create, update, and remove items",
+    icon: FiBriefcase,
+    id: "route-items",
+    label: "Items Management",
+    to: "/items",
+    type: "Page",
+  },
+  {
+    detail: "Profile, password, and appearance settings",
+    icon: FiSettings,
+    id: "route-settings",
+    label: "User Settings",
+    to: "/settings",
+    type: "Page",
+  },
+]
+
+const matchesQuery = (
+  values: Array<string | number | null | undefined>,
+  query: string,
+) =>
+  values.some((value) =>
+    String(value ?? "")
+      .toLowerCase()
+      .includes(query),
+  )
+
+const getItemResults = (items: ItemPublic[], query: string): SearchResult[] =>
+  items
+    .filter((item) =>
+      matchesQuery([item.id, item.title, item.description], query),
+    )
+    .map((item) => ({
+      detail: item.description || `Item #${item.id}`,
+      icon: FiBriefcase,
+      id: `item-${item.id}`,
+      label: item.title,
+      to: "/items",
+      type: "Item",
+    }))
+
+const getUserResults = (users: UserPublic[], query: string): SearchResult[] =>
+  users
+    .filter((user) =>
+      matchesQuery([user.id, user.full_name, user.email], query),
+    )
+    .map((user) => ({
+      detail: user.email,
+      icon: FiUser,
+      id: `user-${user.id}`,
+      label: user.full_name || user.email,
+      to: "/admin",
+      type: "User",
+    }))
+
+const GlobalSearch = () => {
+  const [query, setQuery] = useState("")
+  const [isFocused, setIsFocused] = useState(false)
+  const navigate = useNavigate()
+  const queryClient = useQueryClient()
+  const currentUser = queryClient.getQueryData<UserPublic>(["currentUser"])
+  const canSearchUsers = currentUser?.is_superuser === true
+  const bgColor = useColorModeValue("white", "ui.dark")
+  const borderColor = useColorModeValue("gray.200", "gray.600")
+  const hoverBgColor = useColorModeValue("gray.50", "whiteAlpha.100")
+  const mutedColor = useColorModeValue("gray.500", "gray.400")
+  const iconBgColor = useColorModeValue("teal.50", "whiteAlpha.100")
+  const searchQuery = query.trim().toLowerCase()
+
+  const { data: items, isFetching: isFetchingItems } = useQuery({
+    queryKey: ["items"],
+    queryFn: () => ItemsService.readItems({}),
+    staleTime: 60_000,
+  })
+
+  const { data: users, isFetching: isFetchingUsers } = useQuery({
+    queryKey: ["users"],
+    queryFn: () => UsersService.readUsers({}),
+    enabled: canSearchUsers,
+    staleTime: 60_000,
+  })
+
+  const adminNavigationResults: SearchResult[] = canSearchUsers
+    ? [
+        {
+          detail: "Manage user accounts and permissions",
+          icon: FiUsers,
+          id: "route-admin",
+          label: "User Management",
+          to: "/admin",
+          type: "Page",
+        },
+      ]
+    : []
+
+  const results = useMemo(() => {
+    if (!searchQuery) {
+      return []
+    }
+
+    const pageResults = [
+      ...navigationResults,
+      ...adminNavigationResults,
+    ].filter((result) =>
+      matchesQuery([result.label, result.detail, result.type], searchQuery),
+    )
+    const itemResults = getItemResults(items?.data ?? [], searchQuery)
+    const userResults = canSearchUsers
+      ? getUserResults(users?.data ?? [], searchQuery)
+      : []
+
+    return [...pageResults, ...itemResults, ...userResults].slice(0, 8)
+  }, [
+    adminNavigationResults,
+    canSearchUsers,
+    items?.data,
+    searchQuery,
+    users?.data,
+  ])
+
+  const isSearching = isFetchingItems || (canSearchUsers && isFetchingUsers)
+  const showResults = isFocused && Boolean(query.trim())
+
+  const handleSelect = (to: SearchPath) => {
+    setQuery("")
+    setIsFocused(false)
+    navigate({ to })
+  }
+
+  const handleKeyDown = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    if (event.key === "Escape") {
+      setQuery("")
+      setIsFocused(false)
+      return
+    }
+
+    if (event.key === "Enter" && results[0]) {
+      handleSelect(results[0].to)
+    }
+  }
+
+  return (
+    <Box position="relative" w="full" maxW={{ base: "full", md: "480px" }}>
+      <InputGroup>
+        <InputLeftElement pointerEvents="none">
+          <Icon as={FaSearch} color="ui.dim" />
+        </InputLeftElement>
+        <Input
+          value={query}
+          onBlur={() => setIsFocused(false)}
+          onChange={(event) => setQuery(event.target.value)}
+          onFocus={() => setIsFocused(true)}
+          onKeyDown={handleKeyDown}
+          placeholder="Search GitEarn"
+          bg={bgColor}
+          borderColor={borderColor}
+          borderRadius="8px"
+        />
+      </InputGroup>
+
+      {showResults && (
+        <Box
+          position="absolute"
+          top="calc(100% + 8px)"
+          left={0}
+          right={0}
+          bg={bgColor}
+          border="1px solid"
+          borderColor={borderColor}
+          borderRadius="8px"
+          boxShadow="lg"
+          overflow="hidden"
+          zIndex={20}
+        >
+          <VStack align="stretch" spacing={0} divider={<Divider />}>
+            {isSearching && (
+              <HStack px={4} py={3} color={mutedColor}>
+                <Spinner size="sm" />
+                <Text fontSize="sm">Searching...</Text>
+              </HStack>
+            )}
+
+            {!isSearching && results.length === 0 && (
+              <Text color={mutedColor} fontSize="sm" px={4} py={3}>
+                No results found
+              </Text>
+            )}
+
+            {results.map((result) => (
+              <Flex
+                as="button"
+                key={result.id}
+                type="button"
+                align="center"
+                gap={3}
+                px={4}
+                py={3}
+                textAlign="left"
+                _hover={{ bg: hoverBgColor }}
+                onMouseDown={(event) => {
+                  event.preventDefault()
+                  handleSelect(result.to)
+                }}
+              >
+                <Flex
+                  align="center"
+                  justify="center"
+                  w="32px"
+                  h="32px"
+                  borderRadius="8px"
+                  bg={iconBgColor}
+                  color="ui.main"
+                  flexShrink={0}
+                >
+                  <Icon as={result.icon} />
+                </Flex>
+                <Box minW={0}>
+                  <HStack spacing={2}>
+                    <Text fontWeight="semibold" noOfLines={1}>
+                      {result.label}
+                    </Text>
+                    <Text color={mutedColor} fontSize="xs">
+                      {result.type}
+                    </Text>
+                  </HStack>
+                  <Text color={mutedColor} fontSize="sm" noOfLines={1}>
+                    {result.detail}
+                  </Text>
+                </Box>
+              </Flex>
+            ))}
+          </VStack>
+        </Box>
+      )}
+    </Box>
+  )
+}
+
+export default GlobalSearch
diff --git a/frontend/src/components/Common/Navbar.tsx b/frontend/src/components/Common/Navbar.tsx
index edcb3d0..0ee2a04 100644
--- a/frontend/src/components/Common/Navbar.tsx
+++ b/frontend/src/components/Common/Navbar.tsx
@@ -15,13 +15,6 @@ const Navbar = ({ type }: NavbarProps) => {
   return (
     <>
       <Flex py={8} gap={4}>
-        {/* TODO: Complete search functionality */}
-        {/* <InputGroup w={{ base: '100%', md: 'auto' }}>
-                    <InputLeftElement pointerEvents='none'>
-                        <Icon as={FaSearch} color='ui.dim' />
-                    </InputLeftElement>
-                    <Input type='text' placeholder='Search' fontSize={{ base: 'sm', md: 'inherit' }} borderRadius='8px' />
-                </InputGroup> */}
         <Button
           variant="primary"
           gap={1}
diff --git a/frontend/src/components/Common/UserMenu.tsx b/frontend/src/components/Common/UserMenu.tsx
index 324dd92..89152d2 100644
--- a/frontend/src/components/Common/UserMenu.tsx
+++ b/frontend/src/components/Common/UserMenu.tsx
@@ -22,12 +22,7 @@ const UserMenu = () => {
   return (
     <>
       {/* Desktop */}
-      <Box
-        display={{ base: "none", md: "block" }}
-        position="fixed"
-        top={4}
-        right={4}
-      >
+      <Box display={{ base: "none", md: "block" }} flexShrink={0}>
         <Menu>
           <MenuButton
             as={IconButton}
diff --git a/frontend/src/routes/_layout.tsx b/frontend/src/routes/_layout.tsx
index 9a6cfa3..aff0b17 100644
--- a/frontend/src/routes/_layout.tsx
+++ b/frontend/src/routes/_layout.tsx
@@ -1,6 +1,7 @@
 import { Flex, Spinner } from "@chakra-ui/react"
 import { Outlet, createFileRoute, redirect } from "@tanstack/react-router"
 
+import GlobalSearch from "../components/Common/GlobalSearch"
 import Sidebar from "../components/Common/Sidebar"
 import UserMenu from "../components/Common/UserMenu"
 import useAuth, { isLoggedIn } from "../hooks/useAuth"
@@ -20,16 +21,29 @@ function Layout() {
   const { isLoading } = useAuth()
 
   return (
-    <Flex maxW="large" h="auto" position="relative">
+    <Flex maxW="large" minH="100vh" position="relative">
       <Sidebar />
       {isLoading ? (
         <Flex justify="center" align="center" height="100vh" width="full">
           <Spinner size="xl" color="ui.main" />
         </Flex>
       ) : (
-        <Outlet />
+        <Flex direction="column" flex="1" minW={0}>
+          <Flex
+            as="header"
+            align="center"
+            justify="space-between"
+            gap={4}
+            px={{ base: 4, md: 8 }}
+            pl={{ base: 16, md: 8 }}
+            pt={4}
+          >
+            <GlobalSearch />
+            <UserMenu />
+          </Flex>
+          <Outlet />
+        </Flex>
       )}
-      <UserMenu />
     </Flex>
   )
 }