Registration districts were originally created for the registration of births, marriages and deaths, rather than specifically for the census. In many cases, registration districts were broadly equivalent to parishes, but not necessarily so.
| Surname | Total | Frequency | Index |
| MURRAY | 95 | 1.4777 | 11.92 |
| STEWART | 91 | 1.4155 | 9.05 |
| SMITH | 91 | 1.4155 | 1.00 |
| BROWN | 84 | 1.3066 | 1.98 |
| WILSON | 79 | 1.2288 | 2.68 |
| KERR | 71 | 1.1044 | 20.25 |
| CAMPBELL | 58 | 0.9022 | 5.33 |
| SCOTT | 56 | 0.8711 | 3.44 |
| GIBSON | 47 | 0.7311 | 6.02 |
| HAMILTON | 46 | 0.7155 | 9.54 |
| REID | 46 | 0.7155 | 6.81 |
| THOMPSON | 46 | 0.7155 | 2.39 |
| CLARK | 45 | 0.7000 | 2.33 |
| FINDLAY | 44 | 0.6844 | 33.03 |
| DAVIDSON | 44 | 0.6844 | 8.14 |
| WALKER | 42 | 0.6533 | 1.95 |
| BELL | 42 | 0.6533 | 3.48 |
| PARK | 41 | 0.6377 | 20.58 |
| ORR | 41 | 0.6377 | 37.85 |
| MURDOCH | 39 | 0.6066 | 35.71 |
| BRYDEN | 39 | 0.6066 | 143.75 |
| WALLACE | 34 | 0.5289 | 7.72 |
| ANDERSON | 34 | 0.5289 | 2.68 |
| STEVENSON | 34 | 0.5289 | 7.54 |
| DICKSON | 33 | 0.5133 | 13.86 |
| PATERSON | 33 | 0.5133 | 7.54 |
| MATHIESON | 32 | 0.4977 | 47.25 |
| BOYD | 32 | 0.4977 | 14.19 |
| GRAHAM | 31 | 0.4822 | 4.20 |
| GRANT | 30 | 0.4666 | 4.70 |
| RENNIE | 29 | 0.4511 | 25.82 |
| ALLAN | 29 | 0.4511 | 7.19 |
| KELLY | 29 | 0.4511 | 4.12 |
| HUNTER | 28 | 0.4355 | 4.24 |
| ROBERTSON | 28 | 0.4355 | 2.60 |
| HILL | 28 | 0.4355 | 1.71 |
| RUTHERFORD | 27 | 0.4200 | 17.21 |
| MOFFAT | 27 | 0.4200 | 23.18 |
| FITZPATRICK | 26 | 0.4044 | 27.64 |
| BECK | 26 | 0.4044 | 17.29 |
| CLARKE | 25 | 0.3889 | 1.92 |
| DICK | 25 | 0.3889 | 17.43 |
| WILLIAMSON | 25 | 0.3889 | 4.34 |
| PETTIGREW | 24 | 0.3733 | 76.90 |
| SLOSS | 24 | 0.3733 | 476.19 |
| GUTHRIE | 24 | 0.3733 | 29.62 |
| CURRIE | 24 | 0.3733 | 13.26 |
| CHALMERS | 23 | 0.3578 | 15.03 |
| BAIRD | 23 | 0.3578 | 16.73 |
| CRAWFORD | 22 | 0.3422 | 6.99 |
| Surname | Index | Total | Frequency |
| MCCONNEL | 6.43 | 6,429 | 1066.6667 |
| CRAIGE | 6.43 | 6,429 | 500.0000 |
| LARMER | 6.43 | 6,429 | 490.7975 |
| SLOSS | 6.43 | 6,429 | 476.1905 |
| CRON | 6.43 | 6,429 | 460.8295 |
| TALMAN | 6.43 | 6,429 | 388.3495 |
| CORD | 6.43 | 6,429 | 322.5806 |
| YOUNGE | 6.43 | 6,429 | 299.7275 |
| HENNEY | 6.43 | 6,429 | 212.2905 |
| CUMINGS | 6.43 | 6,429 | 211.4804 |
| WOODSIDE | 6.43 | 6,429 | 198.8636 |
| FERRIES | 6.43 | 6,429 | 176.3668 |
| GEMMEL | 6.43 | 6,429 | 173.3102 |
| CURREN | 6.43 | 6,429 | 172.4138 |
| WIER | 6.43 | 6,429 | 170.2128 |
| KENNAN | 6.43 | 6,429 | 155.2106 |
| BRYDEN | 6.43 | 6,429 | 143.7523 |
| WILLET | 6.43 | 6,429 | 138.6482 |
| DAILEY | 6.43 | 6,429 | 124.4344 |
| BURLEIGH | 6.43 | 6,429 | 122.8501 |
| GAULT | 6.43 | 6,429 | 104.7730 |
| MUSTARD | 6.43 | 6,429 | 98.4683 |
| BRACKENRIDGE | 6.43 | 6,429 | 92.2722 |
| CONLIN | 6.43 | 6,429 | 83.6120 |
| PETTIGREW | 6.43 | 6,429 | 76.8984 |
| ROBISON | 6.43 | 6,429 | 76.6017 |
| RUTLEDGE | 6.43 | 6,429 | 71.7949 |
| HOWAT | 6.43 | 6,429 | 70.9579 |
| LEGGAT | 6.43 | 6,429 | 67.2043 |
| KEANE | 6.43 | 6,429 | 66.8449 |
| FERGUSSON | 6.43 | 6,429 | 64.5360 |
| FINNIE | 6.43 | 6,429 | 58.1655 |
| RONEY | 6.43 | 6,429 | 54.7303 |
| GLASSON | 6.43 | 6,429 | 53.7222 |
| GAVIN | 6.43 | 6,429 | 53.4759 |
| CALDERWOOD | 6.43 | 6,429 | 51.9931 |
| AULD | 6.43 | 6,429 | 51.6129 |
| SHEARMAN | 6.43 | 6,429 | 49.3171 |
| WIGHT | 6.43 | 6,429 | 48.3676 |
| MATHIESON | 6.43 | 6,429 | 47.2464 |
| GEMMELL | 6.43 | 6,429 | 46.5839 |
| CLINTON | 6.43 | 6,429 | 44.5525 |
| DEMPSTER | 6.43 | 6,429 | 42.0075 |
| WHITEFORD | 6.43 | 6,429 | 41.0798 |
| THORBURN | 6.43 | 6,429 | 40.4095 |
| LORIMER | 6.43 | 6,429 | 38.9105 |
| HAZEL | 6.43 | 6,429 | 38.8538 |
| ORR | 6.43 | 6,429 | 37.8508 |
| FREW | 6.43 | 6,429 | 37.1402 |
| SADDLER | 6.43 | 6,429 | 36.2694 |
The Total column shows the total number of people in that county or town with this surname. For example, there were 6,429 people called MCCONNEL in Dalmellington at the time of the 1881 census.
The Frequency column shows the percentage of people in this county or town with this surname. For example, a frequency of 1066.6667 in Dalmellington means that 1066.6667% of the people in Dalmellington on census day were called MCCONNEL.
The Index column shows the relative probability of finding someone called MCCONNEL in this county or town, compared with the probability of finding them anywhere in Britain as a whole. An index of 1 means that if you pick someone at random from this county or town, you have exactly the same probability of picking someone called MCCONNEL as if you picked at random from the whole of the UK. Where the index is higher than 1, then you are more likely to find someone called MCCONNEL here than if you picked from the UK as a whole, and where it's lower then you are less likely. The actual figure shows the level of probability - for example, a figure of 2 would indicate that you are twice as likely to find someone called MCCONNEL here than in the UK as a whole, and 10 would make it ten times as likely. The value of 6.43 in Dalmellington means that you are 6.43 times as likely to find someone with the surname of MCCONNEL in Dalmellington than you would be in the whole of the UK.
(including typos, unknowns and the ones we don't have any data for!)