diff --git a/services/web/app/src/Features/User/UserAuditLogHandler.mjs b/services/web/app/src/Features/User/UserAuditLogHandler.mjs
index 21e4ac85c2..12fe990608 100644
--- a/services/web/app/src/Features/User/UserAuditLogHandler.mjs
+++ b/services/web/app/src/Features/User/UserAuditLogHandler.mjs
@@ -102,12 +102,29 @@ async function addEntry(userId, operation, initiatorId, ipAddress, info = {}) {
   await UserAuditLogEntry.create(entry)
 }
 
+function addEntryInBackground(
+  userId,
+  operation,
+  initiatorId,
+  ipAddress,
+  info = {}
+) {
+  // Intentionally not awaited
+  addEntry(userId, operation, initiatorId, ipAddress, info).catch(err => {
+    logger.error(
+      { err, userId, operation, initiatorId, ipAddress, info },
+      'error adding user audit log entry'
+    )
+  })
+}
+
 const UserAuditLogHandler = {
   MANAGED_GROUP_USER_EVENTS,
   addEntry: callbackify(addEntry),
   promises: {
     addEntry,
   },
+  addEntryInBackground,
 }
 
 export default UserAuditLogHandler
diff --git a/services/web/app/src/Features/User/UserController.mjs b/services/web/app/src/Features/User/UserController.mjs
index 88b09691d7..2c50334aba 100644
--- a/services/web/app/src/Features/User/UserController.mjs
+++ b/services/web/app/src/Features/User/UserController.mjs
@@ -473,6 +473,16 @@ async function doLogout(req) {
   logger.debug({ user }, 'logging out')
   const sessionId = req.sessionID
 
+  if (user != null) {
+    UserAuditLogHandler.addEntryInBackground(
+      user._id,
+      'logout',
+      user._id,
+      req.ip,
+      {}
+    )
+  }
+
   if (typeof req.logout === 'function') {
     // passport logout
     const logout = promisify(req.logout.bind(req))
diff --git a/services/web/test/acceptance/src/SessionTests.mjs b/services/web/test/acceptance/src/SessionTests.mjs
index 9a265020db..a106a14368 100644
--- a/services/web/test/acceptance/src/SessionTests.mjs
+++ b/services/web/test/acceptance/src/SessionTests.mjs
@@ -68,6 +68,70 @@ describe('Sessions', function () {
         }
       )
     })
+
+    it('should update audit log on logout', function (done) {
+      async.series(
+        [
+          next => {
+            redis.clearUserSessions(this.user1, next)
+          },
+
+          // login
+          next => {
+            this.user1.login(err => next(err))
+          },
+
+          // logout, should add logout audit log entry (happens in background)
+          next => {
+            this.user1.logout(err => next(err))
+          },
+
+          // poll for audit log entry since it's written in the background
+          next => {
+            let attempts = 0
+            const checkAuditLog = () => {
+              this.user1.getAuditLogWithoutNoise((error, auditLog) => {
+                if (error) return next(error)
+
+                const logoutEntries = auditLog.filter(
+                  entry => entry.operation === 'logout'
+                )
+
+                // If we found the logout entry, we're done
+                if (logoutEntries.length > 0) {
+                  expect(logoutEntries.length).to.be.greaterThan(0)
+                  const lastLogout = logoutEntries[logoutEntries.length - 1]
+                  expect(lastLogout.operation).to.equal('logout')
+                  expect(lastLogout.ipAddress).to.exist
+                  expect(lastLogout.initiatorId).to.exist
+                  expect(lastLogout.timestamp).to.exist
+                  return next()
+                }
+
+                // Otherwise retry up to 10 times
+                attempts++
+                if (attempts >= 10) {
+                  return next(
+                    new Error(
+                      'Logout audit log entry not found after 10 attempts'
+                    )
+                  )
+                }
+
+                setTimeout(checkAuditLog, 25)
+              })
+            }
+            checkAuditLog()
+          },
+        ],
+        (err, result) => {
+          if (err) {
+            throw err
+          }
+          done()
+        }
+      )
+    })
   })
 
   describe('two sessions', function () {
@@ -465,11 +529,19 @@ describe('Sessions', function () {
             this.user1.getAuditLogWithoutNoise((error, auditLog) => {
               expect(error).not.to.exist
               expect(auditLog).to.exist
-              expect(auditLog[0].operation).to.equal('clear-sessions')
-              expect(auditLog[0].ipAddress).to.exist
-              expect(auditLog[0].initiatorId).to.exist
-              expect(auditLog[0].timestamp).to.exist
-              expect(auditLog[0].info.sessions.length).to.equal(2)
+
+              // find the clear-sessions entry
+              const clearSessionsEntries = auditLog.filter(
+                entry => entry.operation === 'clear-sessions'
+              )
+              expect(clearSessionsEntries.length).to.equal(1)
+              expect(clearSessionsEntries[0].operation).to.equal(
+                'clear-sessions'
+              )
+              expect(clearSessionsEntries[0].ipAddress).to.exist
+              expect(clearSessionsEntries[0].initiatorId).to.exist
+              expect(clearSessionsEntries[0].timestamp).to.exist
+              expect(clearSessionsEntries[0].info.sessions.length).to.equal(2)
               next()
             })
           },
diff --git a/services/web/test/acceptance/src/helpers/UserHelper.mjs b/services/web/test/acceptance/src/helpers/UserHelper.mjs
index aea5ca66ee..d14d41c4c3 100644
--- a/services/web/test/acceptance/src/helpers/UserHelper.mjs
+++ b/services/web/test/acceptance/src/helpers/UserHelper.mjs
@@ -58,6 +58,16 @@ class UserHelper {
     })
   }
 
+  /**
+   * Get auditLog by operation
+   * @return {object[]}
+   */
+  getAuditLogByOperation(operation) {
+    return (this.user.auditLog || []).filter(entry => {
+      return entry.operation === operation
+    })
+  }
+
   /**
    * Generate default email from unique (per instantiation) user number
    * @returns {string} email
diff --git a/services/web/test/unit/src/User/UserController.test.mjs b/services/web/test/unit/src/User/UserController.test.mjs
index 22a371723c..303f767a08 100644
--- a/services/web/test/unit/src/User/UserController.test.mjs
+++ b/services/web/test/unit/src/User/UserController.test.mjs
@@ -120,6 +120,7 @@ describe('UserController', function () {
       promises: {
         addEntry: sinon.stub().resolves(),
       },
+      addEntryInBackground: sinon.stub(),
     }
 
     ctx.RequestContentTypeDetection = {