diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9275f6c7a..e8bfaefa0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - Improved performance of 3D fox logo
 - Fetch token prices based on contract address, not symbol
 - Fix bug that prevents setting language locale in settings.
+- Show checksum addresses throughout the UI
 
 ## 4.5.5 Fri Apr 06 2018
 
diff --git a/test/integration/lib/tx-list-items.js b/test/integration/lib/tx-list-items.js
index d0056eb94..0c0c5a77f 100644
--- a/test/integration/lib/tx-list-items.js
+++ b/test/integration/lib/tx-list-items.js
@@ -53,7 +53,7 @@ async function runTxListItemsTest(assert, done) {
 
   const confirmedTokenTx = txListItems[6]
   const confirmedTokenTxAddress = await findAsync($(confirmedTokenTx), '.tx-list-account')
-  assert.equal(confirmedTokenTxAddress[0].textContent, '0xe7884118...81a9', 'confirmedTokenTx has correct address')
+  assert.equal(confirmedTokenTxAddress[0].textContent, '0xE7884118...81a9', 'confirmedTokenTx has correct address')
 
   const rejectedTx = txListItems[7]
   const rejectedTxRenderedStatus = await findAsync($(rejectedTx), '.tx-list-status')
diff --git a/ui/app/components/account-dropdowns.js b/ui/app/components/account-dropdowns.js
index 03955e077..043008a36 100644
--- a/ui/app/components/account-dropdowns.js
+++ b/ui/app/components/account-dropdowns.js
@@ -7,8 +7,8 @@ const connect = require('react-redux').connect
 const Dropdown = require('./dropdown').Dropdown
 const DropdownMenuItem = require('./dropdown').DropdownMenuItem
 const Identicon = require('./identicon')
-const ethUtil = require('ethereumjs-util')
 const copyToClipboard = require('copy-to-clipboard')
+const { checksumAddress } = require('../util')
 
 class AccountDropdowns extends Component {
   constructor (props) {
@@ -212,8 +212,7 @@ class AccountDropdowns extends Component {
             closeMenu: () => {},
             onClick: () => {
               const { selected } = this.props
-              const checkSumAddress = selected && ethUtil.toChecksumAddress(selected)
-              copyToClipboard(checkSumAddress)
+              copyToClipboard(checksumAddress(selected))
             },
           },
           this.context.t('copyAddress'),
diff --git a/ui/app/components/dropdowns/components/account-dropdowns.js b/ui/app/components/dropdowns/components/account-dropdowns.js
index a133f0e29..179b6617f 100644
--- a/ui/app/components/dropdowns/components/account-dropdowns.js
+++ b/ui/app/components/dropdowns/components/account-dropdowns.js
@@ -7,7 +7,7 @@ const connect = require('react-redux').connect
 const Dropdown = require('./dropdown').Dropdown
 const DropdownMenuItem = require('./dropdown').DropdownMenuItem
 const Identicon = require('../../identicon')
-const ethUtil = require('ethereumjs-util')
+const { checksumAddress } = require('../../../util')
 const copyToClipboard = require('copy-to-clipboard')
 const { formatBalance } = require('../../../util')
 
@@ -311,8 +311,7 @@ class AccountDropdowns extends Component {
             closeMenu: () => {},
             onClick: () => {
               const { selected } = this.props
-              const checkSumAddress = selected && ethUtil.toChecksumAddress(selected)
-              copyToClipboard(checkSumAddress)
+              copyToClipboard(checksumAddress(selected))
             },
             style: Object.assign(
               dropdownMenuItemStyle,
diff --git a/ui/app/components/modals/export-private-key-modal.js b/ui/app/components/modals/export-private-key-modal.js
index 1f80aed39..447e43b7a 100644
--- a/ui/app/components/modals/export-private-key-modal.js
+++ b/ui/app/components/modals/export-private-key-modal.js
@@ -3,12 +3,13 @@ const PropTypes = require('prop-types')
 const h = require('react-hyperscript')
 const inherits = require('util').inherits
 const connect = require('react-redux').connect
-const ethUtil = require('ethereumjs-util')
+const { stripHexPrefix } = require('ethereumjs-util')
 const actions = require('../../actions')
 const AccountModalContainer = require('./account-modal-container')
 const { getSelectedIdentity } = require('../../selectors')
 const ReadOnlyInput = require('../readonly-input')
 const copyToClipboard = require('copy-to-clipboard')
+const { checksumAddress } = require('../../util')
 
 function mapStateToProps (state) {
   return {
@@ -60,7 +61,7 @@ ExportPrivateKeyModal.prototype.renderPasswordLabel = function (privateKey) {
 }
 
 ExportPrivateKeyModal.prototype.renderPasswordInput = function (privateKey) {
-  const plainKey = privateKey && ethUtil.stripHexPrefix(privateKey)
+  const plainKey = privateKey && stripHexPrefix(privateKey)
 
   return privateKey
     ? h(ReadOnlyInput, {
@@ -121,7 +122,7 @@ ExportPrivateKeyModal.prototype.render = function () {
       h(ReadOnlyInput, {
         wrapperClass: 'ellip-address-wrapper',
         inputClass: 'qr-ellip-address ellip-address',
-        value: address,
+        value: checksumAddress(address),
       }),
 
       h('div.account-modal-divider'),
diff --git a/ui/app/components/qr-code.js b/ui/app/components/qr-code.js
index 83885539c..3b2c62f49 100644
--- a/ui/app/components/qr-code.js
+++ b/ui/app/components/qr-code.js
@@ -3,8 +3,9 @@ const h = require('react-hyperscript')
 const qrCode = require('qrcode-npm').qrcode
 const inherits = require('util').inherits
 const connect = require('react-redux').connect
-const isHexPrefixed = require('ethereumjs-util').isHexPrefixed
+const { isHexPrefixed } = require('ethereumjs-util')
 const ReadOnlyInput = require('./readonly-input')
+const { checksumAddress } = require('../util')
 
 module.exports = connect(mapStateToProps)(QrCodeView)
 
@@ -24,16 +25,16 @@ function QrCodeView () {
 
 QrCodeView.prototype.render = function () {
   const props = this.props
-  const Qr = props.Qr
-  const address = `${isHexPrefixed(Qr.data) ? 'ethereum:' : ''}${Qr.data}`
+  const { message, data } = props.Qr
+  const address = `${isHexPrefixed(data) ? 'ethereum:' : ''}${data}`
   const qrImage = qrCode(4, 'M')
   qrImage.addData(address)
   qrImage.make()
 
   return h('.div.flex-column.flex-center', [
-    Array.isArray(Qr.message)
+    Array.isArray(message)
       ? h('.message-container', this.renderMultiMessage())
-      : Qr.message && h('.qr-header', Qr.message),
+      : message && h('.qr-header', message),
 
     this.props.warning ? this.props.warning && h('span.error.flex-center', {
       style: {
@@ -50,7 +51,7 @@ QrCodeView.prototype.render = function () {
     h(ReadOnlyInput, {
       wrapperClass: 'ellip-address-wrapper',
       inputClass: 'qr-ellip-address',
-      value: Qr.data,
+      value: checksumAddress(data),
     }),
   ])
 }
diff --git a/ui/app/components/send/account-list-item.js b/ui/app/components/send/account-list-item.js
index 1ad3f69c1..b5e604a6e 100644
--- a/ui/app/components/send/account-list-item.js
+++ b/ui/app/components/send/account-list-item.js
@@ -2,6 +2,7 @@ const Component = require('react').Component
 const h = require('react-hyperscript')
 const inherits = require('util').inherits
 const connect = require('react-redux').connect
+const { checksumAddress } = require('../../util')
 const Identicon = require('../identicon')
 const CurrencyDisplay = require('./currency-display')
 const { conversionRateSelector, getCurrentCurrency } = require('../../selectors')
@@ -56,7 +57,7 @@ AccountListItem.prototype.render = function () {
 
     ]),
 
-    displayAddress && name && h('div.account-list-item__account-address', address),
+    displayAddress && name && h('div.account-list-item__account-address', checksumAddress(address)),
 
     displayBalance && h(CurrencyDisplay, {
       primaryCurrency: 'ETH',
diff --git a/ui/app/components/tx-list-item.js b/ui/app/components/tx-list-item.js
index 403f83ab9..bd4ea80a6 100644
--- a/ui/app/components/tx-list-item.js
+++ b/ui/app/components/tx-list-item.js
@@ -9,6 +9,7 @@ const abiDecoder = require('abi-decoder')
 abiDecoder.addABI(abi)
 const Identicon = require('./identicon')
 const contractMap = require('eth-contract-metadata')
+const { checksumAddress } = require('../util')
 
 const actions = require('../actions')
 const { conversionUtil, multiplyCurrencies } = require('../conversion-util')
@@ -74,10 +75,12 @@ TxListItem.prototype.getAddressText = function () {
   const decodedData = txParams.data && abiDecoder.decodeMethod(txParams.data)
   const { name: txDataName, params = [] } = decodedData || {}
   const { value } = params[0] || {}
+  const checksummedAddress = checksumAddress(address)
+  const checksummedValue = checksumAddress(value)
 
   let addressText
   if (txDataName === 'transfer' || address) {
-    const addressToRender = txDataName === 'transfer' ? value : address
+    const addressToRender = txDataName === 'transfer' ? checksummedValue : checksummedAddress
     addressText = `${addressToRender.slice(0, 10)}...${addressToRender.slice(-4)}`
   } else if (isMsg) {
     addressText = this.context.t('sigRequest')
diff --git a/ui/app/components/tx-view.js b/ui/app/components/tx-view.js
index 80aac35c4..263f992c0 100644
--- a/ui/app/components/tx-view.js
+++ b/ui/app/components/tx-view.js
@@ -2,13 +2,13 @@ const Component = require('react').Component
 const PropTypes = require('prop-types')
 const connect = require('react-redux').connect
 const h = require('react-hyperscript')
-const ethUtil = require('ethereumjs-util')
 const inherits = require('util').inherits
 const { withRouter } = require('react-router-dom')
 const { compose } = require('recompose')
 const actions = require('../actions')
 const selectors = require('../selectors')
 const { SEND_ROUTE } = require('../routes')
+const { checksumAddress: toChecksumAddress } = require('../util')
 
 const BalanceComponent = require('./balance-component')
 const TxList = require('./tx-list')
@@ -32,7 +32,7 @@ function mapStateToProps (state) {
   const network = state.metamask.network
   const selectedTokenAddress = state.metamask.selectedTokenAddress
   const selectedAddress = state.metamask.selectedAddress || Object.keys(accounts)[0]
-  const checksumAddress = selectedAddress && ethUtil.toChecksumAddress(selectedAddress)
+  const checksumAddress = toChecksumAddress(selectedAddress)
   const identity = identities[selectedAddress]
 
   return {
diff --git a/ui/app/components/wallet-view.js b/ui/app/components/wallet-view.js
index e3e1b8903..9e430f87b 100644
--- a/ui/app/components/wallet-view.js
+++ b/ui/app/components/wallet-view.js
@@ -6,6 +6,7 @@ const { withRouter } = require('react-router-dom')
 const { compose } = require('recompose')
 const inherits = require('util').inherits
 const classnames = require('classnames')
+const { checksumAddress } = require('../util')
 const Identicon = require('./identicon')
 // const AccountDropdowns = require('./dropdowns/index.js').AccountDropdowns
 const Tooltip = require('./tooltip-v2.js')
@@ -107,6 +108,8 @@ WalletView.prototype.render = function () {
   // temporary logs + fake extra wallets
   // console.log('walletview, selectedAccount:', selectedAccount)
 
+  const checksummedAddress = checksumAddress(selectedAddress)
+
   const keyring = keyrings.find((kr) => {
     return kr.accounts.includes(selectedAddress) ||
       kr.accounts.includes(selectedIdentity.address)
@@ -135,7 +138,7 @@ WalletView.prototype.render = function () {
       }, [
         h(Identicon, {
           diameter: 54,
-          address: selectedAddress,
+          address: checksummedAddress,
         }),
 
         h('span.account-name', {
@@ -158,7 +161,7 @@ WalletView.prototype.render = function () {
           'wallet-view__address__pressed': this.state.copyToClipboardPressed,
         }),
         onClick: () => {
-          copyToClipboard(selectedAddress)
+          copyToClipboard(checksummedAddress)
           this.setState({ hasCopied: true })
           setTimeout(() => this.setState({ hasCopied: false }), 3000)
         },
@@ -169,7 +172,7 @@ WalletView.prototype.render = function () {
           this.setState({ copyToClipboardPressed: false })
         },
       }, [
-        `${selectedAddress.slice(0, 4)}...${selectedAddress.slice(-4)}`,
+        `${checksummedAddress.slice(0, 4)}...${checksummedAddress.slice(-4)}`,
         h('i.fa.fa-clipboard', { style: { marginLeft: '8px' } }),
       ]),
     ]),
diff --git a/ui/app/util.js b/ui/app/util.js
index bbe2bb09e..8e9390dfb 100644
--- a/ui/app/util.js
+++ b/ui/app/util.js
@@ -57,6 +57,7 @@ module.exports = {
   isInvalidChecksumAddress,
   allNull,
   getTokenAddressFromTokenObject,
+  checksumAddress,
 }
 
 function valuesFor (obj) {
@@ -67,7 +68,7 @@ function valuesFor (obj) {
 
 function addressSummary (address, firstSegLength = 10, lastSegLength = 4, includeHex = true) {
   if (!address) return ''
-  let checked = ethUtil.toChecksumAddress(address)
+  let checked = checksumAddress(address)
   if (!includeHex) {
     checked = ethUtil.stripHexPrefix(checked)
   }
@@ -76,7 +77,7 @@ function addressSummary (address, firstSegLength = 10, lastSegLength = 4, includ
 
 function miniAddressSummary (address) {
   if (!address) return ''
-  var checked = ethUtil.toChecksumAddress(address)
+  var checked = checksumAddress(address)
   return checked ? checked.slice(0, 4) + '...' + checked.slice(-4) : '...'
 }
 
@@ -287,3 +288,13 @@ function allNull (obj) {
 function getTokenAddressFromTokenObject (token) {
   return Object.values(token)[0].address.toLowerCase()
 }
+
+/**
+ * Safely checksumms a potentially-null address
+ * 
+ * @param {String} [address] - address to checksum
+ * @returns {String} - checksummed address
+ */
+function checksumAddress (address) {
+  return address ? ethUtil.toChecksumAddress(address) : ''
+}
diff --git a/ui/lib/icon-factory.js b/ui/lib/icon-factory.js
index 31498a3a9..7fadbceff 100644
--- a/ui/lib/icon-factory.js
+++ b/ui/lib/icon-factory.js
@@ -1,6 +1,6 @@
 var iconFactory
 const isValidAddress = require('ethereumjs-util').isValidAddress
-const toChecksumAddress = require('ethereumjs-util').toChecksumAddress
+const { checksumAddress } = require('../app/util')
 const contractMap = require('eth-contract-metadata')
 
 module.exports = function (jazzicon) {
@@ -16,7 +16,7 @@ function IconFactory (jazzicon) {
 }
 
 IconFactory.prototype.iconForAddress = function (address, diameter) {
-  const addr = toChecksumAddress(address)
+  const addr = checksumAddress(address)
   if (iconExistsFor(addr)) {
     return imageElFor(addr)
   }