diff --git a/packages/concordia-app/public/locales/en/translation.json b/packages/concordia-app/public/locales/en/translation.json
index b77fbb1..df36e49 100644
--- a/packages/concordia-app/public/locales/en/translation.json
+++ b/packages/concordia-app/public/locales/en/translation.json
@@ -90,6 +90,7 @@
   "topic.poll.invalid.data.header": "This topic has a poll but the data are untrusted!",
   "topic.poll.invalid.data.sub.header": "The poll data downloaded from the poster have been tampered with.",
   "topic.poll.tab.graph.title": "Results",
+  "topic.poll.tab.results.vote": "Vote",
   "topic.poll.tab.results.votes": "Votes",
   "topic.poll.tab.results.user.vote": "You voted: ",
   "topic.poll.tab.vote.no.changes": "This poll does not allow vote changes.",
diff --git a/packages/concordia-app/src/components/PollView/PollGraph/PollChartBar/index.jsx b/packages/concordia-app/src/components/PollView/PollGraph/PollChartBar/index.jsx
index 313a3e8..c5ca9d7 100644
--- a/packages/concordia-app/src/components/PollView/PollGraph/PollChartBar/index.jsx
+++ b/packages/concordia-app/src/components/PollView/PollGraph/PollChartBar/index.jsx
@@ -4,7 +4,7 @@ import PropTypes from 'prop-types';
 import { CHART_TYPE_BAR } from '../../../../constants/polls/PollGraph';
 
 const PollChartBar = (props) => {
-  const { pollOptions, voteCounts } = props;
+  const { pollOptions, voteCounts, voterNames } = props;
 
   const chartOptions = useMemo(() => ({
     chart: {
@@ -30,9 +30,20 @@ const PollChartBar = (props) => {
       },
     },
     tooltip: {
-      enabled: false,
+      enabled: true,
+      x: {
+        show: false,
+      },
+      y: {
+        formatter(value, { seriesIndex }) {
+          return `<div>${voterNames[seriesIndex].join('</div><div>')}</div>`;
+        },
+        title: {
+          formatter: () => null,
+        },
+      },
     },
-  }), [pollOptions]);
+  }), [pollOptions, voterNames]);
 
   const chartSeries = useMemo(() => [{
     name: 'Votes',
diff --git a/packages/concordia-app/src/components/PollView/PollGraph/PollChartDonut/index.jsx b/packages/concordia-app/src/components/PollView/PollGraph/PollChartDonut/index.jsx
index 03acf4f..3d0644c 100644
--- a/packages/concordia-app/src/components/PollView/PollGraph/PollChartDonut/index.jsx
+++ b/packages/concordia-app/src/components/PollView/PollGraph/PollChartDonut/index.jsx
@@ -4,7 +4,7 @@ import PropTypes from 'prop-types';
 import { CHART_TYPE_DONUT } from '../../../../constants/polls/PollGraph';
 
 const PollChartDonut = (props) => {
-  const { pollOptions, voteCounts } = props;
+  const { pollOptions, voteCounts, voterNames } = props;
 
   const chartOptions = useMemo(() => ({
     chart: {
@@ -30,12 +30,21 @@ const PollChartDonut = (props) => {
     },
     labels: pollOptions,
     tooltip: {
-      enabled: false,
+      enabled: true,
+      fillSeriesColor: false,
+      y: {
+        formatter(value, { seriesIndex }) {
+          return `<div>${voterNames[seriesIndex].join('</div><div>')}</div>`;
+        },
+        title: {
+          formatter: () => null,
+        },
+      },
     },
     legend: {
       position: 'bottom',
     },
-  }), [pollOptions]);
+  }), [pollOptions, voterNames]);
 
   return (
       <Chart
diff --git a/packages/concordia-app/src/components/PollView/PollGraph/index.jsx b/packages/concordia-app/src/components/PollView/PollGraph/index.jsx
index 4d3c530..205b297 100644
--- a/packages/concordia-app/src/components/PollView/PollGraph/index.jsx
+++ b/packages/concordia-app/src/components/PollView/PollGraph/index.jsx
@@ -1,4 +1,4 @@
-import React, { useMemo } from 'react';
+import React, { useEffect, useMemo, useState } from 'react';
 import { Grid, Statistic, Tab } from 'semantic-ui-react';
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
@@ -7,16 +7,23 @@ import PollChartDonut from './PollChartDonut';
 import './styles.css';
 
 const PollGraph = (props) => {
-  const { pollOptions, voteCounts, userVoteIndex } = props;
+  const { pollOptions, userVoteIndex, voteCounts, voterNames } = props;
+  const [totalVotes, setTotalVotes] = useState(voteCounts.reduce((accumulator, voteCount) => accumulator + voteCount, 0));
   const { t } = useTranslation();
 
+  useEffect(() => {
+    setTotalVotes(voteCounts.reduce((accumulator, voteCount) => accumulator + voteCount, 0));
+  }, [voteCounts]);
+
   const footer = useMemo(() => (
       <>
           <Statistic size="mini">
               <Statistic.Value>
-                  {voteCounts.reduce((accumulator, voteCount) => accumulator + voteCount, 0)}
+                  { totalVotes }
               </Statistic.Value>
-              <Statistic.Label>{t('topic.poll.tab.results.votes')}</Statistic.Label>
+              <Statistic.Label>
+                  { totalVotes !== 1 ? t('topic.poll.tab.results.votes') : t('topic.poll.tab.results.vote') }
+              </Statistic.Label>
           </Statistic>
           {userVoteIndex !== -1
           && (
@@ -26,7 +33,7 @@ const PollGraph = (props) => {
               </div>
           )}
       </>
-  ), [pollOptions, t, userVoteIndex, voteCounts]);
+  ), [pollOptions, t, totalVotes, userVoteIndex]);
 
   const panes = useMemo(() => {
     const chartBarPane = (
@@ -38,6 +45,7 @@ const PollGraph = (props) => {
                         <PollChartBar
                           pollOptions={pollOptions}
                           voteCounts={voteCounts}
+                          voterNames={voterNames}
                         />
                     </Grid.Column>
                     <Grid.Column />
@@ -59,6 +67,7 @@ const PollGraph = (props) => {
                         <PollChartDonut
                           pollOptions={pollOptions}
                           voteCounts={voteCounts}
+                          voterNames={voterNames}
                         />
                     </Grid.Column>
                     <Grid.Column />
@@ -76,7 +85,7 @@ const PollGraph = (props) => {
       { menuItem: { key: 'chart-bar', icon: 'chart bar' }, render: () => chartBarPane },
       { menuItem: { key: 'chart-donut', icon: 'chart pie' }, render: () => chartDonutPane },
     ]);
-  }, [footer, pollOptions, voteCounts]);
+  }, [footer, pollOptions, voteCounts, voterNames]);
 
   return (
       <Tab
@@ -93,6 +102,7 @@ PollGraph.defaultProps = {
 PollGraph.propTypes = {
   pollOptions: PropTypes.arrayOf(PropTypes.string).isRequired,
   voteCounts: PropTypes.arrayOf(PropTypes.number).isRequired,
+  voterNames: PropTypes.arrayOf(PropTypes.array).isRequired,
   userVoteIndex: PropTypes.number,
 };
 
diff --git a/packages/concordia-app/src/components/PollView/PollGraph/styles.css b/packages/concordia-app/src/components/PollView/PollGraph/styles.css
index a2c3d42..d12d62e 100644
--- a/packages/concordia-app/src/components/PollView/PollGraph/styles.css
+++ b/packages/concordia-app/src/components/PollView/PollGraph/styles.css
@@ -2,3 +2,9 @@
     box-shadow: none;
     border: none;
 }
+
+.apexcharts-tooltip {
+    border: 1px solid #ddd !important;
+    background-color: white !important;
+    color: black !important;
+}
diff --git a/packages/concordia-app/src/components/PollView/index.jsx b/packages/concordia-app/src/components/PollView/index.jsx
index 955d2f8..80214f2 100644
--- a/packages/concordia-app/src/components/PollView/index.jsx
+++ b/packages/concordia-app/src/components/PollView/index.jsx
@@ -44,6 +44,7 @@ const PollView = (props) => {
   const [pollOptions, setPollOptions] = useState([]);
   const [voteCounts, setVoteCounts] = useState([]);
   const [voters, setVoters] = useState([]);
+  const [voterNames, setVoterNames] = useState([]);
   const [pollHashValid, setPollHashValid] = useState(true);
   const [pollQuestion, setPollQuestion] = useState('');
   const [chainDataLoading, setChainDataLoading] = useState(true);
@@ -84,6 +85,11 @@ const PollView = (props) => {
           .slice(index > 0 ? cumulativeSum[index - 1] : 0,
             subArrayEnd)));
 
+      setVoterNames(cumulativeSum
+        .map((subArrayEnd, index) => pollResults.value[6]
+          .slice(index > 0 ? cumulativeSum[index - 1] : 0,
+            subArrayEnd)));
+
       setChainDataLoading(false);
     }
   }, [getPollCallHash, getPollResults]);
@@ -148,10 +154,11 @@ const PollView = (props) => {
             pollOptions={pollOptions}
             voteCounts={voteCounts}
             userVoteIndex={userVoteIndex}
+            voterNames={voterNames}
           />
       )
       : null
-  ), [chainDataLoading, orbitDataLoading, pollOptions, userVoteIndex, voteCounts]);
+  ), [chainDataLoading, orbitDataLoading, pollOptions, userVoteIndex, voteCounts, voterNames]);
 
   const panes = useMemo(() => {
     const pollVotePane = (
diff --git a/packages/concordia-contracts/contracts/Forum.sol b/packages/concordia-contracts/contracts/Forum.sol
index dca35fc..66ccd64 100644
--- a/packages/concordia-contracts/contracts/Forum.sol
+++ b/packages/concordia-contracts/contracts/Forum.sol
@@ -3,6 +3,7 @@ pragma solidity 0.8.1;
 
 contract Forum {
     // Error messages for require()
+    string public constant USER_HAS_SIGNED_UP = "User has already signed up.";
     string public constant USER_HAS_NOT_SIGNED_UP = "User hasn't signed up yet.";
     string public constant USERNAME_TAKEN = "Username is already taken.";
     string public constant TOPIC_DOES_NOT_EXIST = "Topic doesn't exist.";
@@ -28,7 +29,7 @@ contract Forum {
     event UsernameUpdated(string newName, string oldName, address userAddress);
 
     function signUp(string memory username) public returns (bool) {
-        require(!hasUserSignedUp(msg.sender), USER_HAS_NOT_SIGNED_UP);
+        require(!hasUserSignedUp(msg.sender), USER_HAS_SIGNED_UP);
         require(!isUserNameTaken(username), USERNAME_TAKEN);
         users[msg.sender] = User(username, new uint[](0), new uint[](0), block.timestamp, true);
         usernameAddresses[username] = msg.sender;
@@ -118,6 +119,16 @@ contract Forum {
         return userAddresses;
     }
 
+    function getUsernames(address[] memory userAddressesArray) public view returns (string[] memory) {
+        string[] memory usernamesArray = new string[](userAddressesArray.length);
+
+        for (uint i = 0; i < userAddressesArray.length; i++) {
+            usernamesArray[i] = getUsername(userAddressesArray[i]);
+        }
+
+        return usernamesArray;
+    }
+
     //----------------------------------------POSTING----------------------------------------
     struct Topic {
         uint topicID;
diff --git a/packages/concordia-contracts/contracts/Voting.sol b/packages/concordia-contracts/contracts/Voting.sol
index b11d9b1..03eb04c 100644
--- a/packages/concordia-contracts/contracts/Voting.sol
+++ b/packages/concordia-contracts/contracts/Voting.sol
@@ -68,26 +68,29 @@ contract Voting {
         );
     }
 
-    function getPoll(uint topicID) public view returns (uint, string memory, bool, uint, uint[] memory, address[] memory, uint) {
+    function getPoll(uint topicID) public view
+        returns (uint, string memory, bool, uint, uint[] memory, address[] memory, string[] memory) {
         require(pollExists(topicID), POLL_DOES_NOT_EXIST);
 
-        uint totalVotes = getTotalVotes(topicID);
         uint[] memory voteCounts = getVoteCounts(topicID);
-        address[] memory voters = getSerializedVoters(topicID, voteCounts, totalVotes);
+        address[] memory voters = getSerializedVoters(topicID, voteCounts);
+        string[] memory voterNames = forum.getUsernames(voters);
+
+        Poll storage poll = polls[topicID];
 
         return (
-        polls[topicID].numOptions,
-        polls[topicID].dataHash,
-        polls[topicID].enableVoteChanges,
-        polls[topicID].timestamp,
-        voteCounts,
-        voters,
-        totalVotes
+            poll.numOptions,
+            poll.dataHash,
+            poll.enableVoteChanges,
+            poll.timestamp,
+            voteCounts,
+            voters,
+            voterNames
         );
     }
 
-    function getSerializedVoters(uint topicID, uint[] memory voteCounts, uint totalVotes) private view returns (address[] memory) {
-
+    function getSerializedVoters(uint topicID, uint[] memory voteCounts) private view returns (address[] memory) {
+        uint totalVotes = getTotalVotes(topicID);
         address[] memory voters = new address[](totalVotes);
         uint serializationIndex = 0;
 
@@ -99,7 +102,7 @@ contract Voting {
             }
         }
 
-        return (voters);
+        return voters;
     }
 
     function isOptionValid(uint topicID, uint option) private view returns (bool) {