Biggest UK (not)parkrun totals:
Witney 880 (not)parkruns
Maidstone 769 (not)parkruns
Chelmsford Central 586 (not)parkruns
Blackpool 393 (not)parkruns
Nonsuch 331 (not)parkruns
Whitstable 295 (not)parkruns
Hull 291 (not)parkruns
Luton Wardown 291 (not)parkruns
Bushy Park 268 (not)parkruns
Tonbridge 255 (not)parkruns

Highest adjusted* average (not)parkruns per parkrunner: Blackpool with 108 parkrunners recording 393 (not)parkruns
Lowest adjusted* average (not)parkruns per parkrunner: Boston with 14 parkrunners recording 14 (not)parkruns
(* = adjusted according a statistical formula to take account of parkruns with very low numbers)

Worldwide 16049 parkrunners recorded 29870 (not)parkruns, with an average time of 35:04
In the UK 11718 parkrunners recorded 21510 (not)parkruns, with an average time of 33:56
In South Africa 1799 parkrunners recorded 3614 (not)parkruns, with an average time of 41:15
In Ireland 1474 parkrunners recorded 2645 (not)parkruns, with an average time of 35:15
In Australia 239 parkrunners recorded 473 (not)parkruns, with an average time of 38:33
In Germany 159 parkrunners recorded 399 (not)parkruns, with an average time of 35:52
In Poland 131 parkrunners recorded 264 (not)parkruns, with an average time of 34:53
In the US 138 parkrunners recorded 257 (not)parkruns, with an average time of 35:53
In Canada 111 parkrunners recorded 217 (not)parkruns, with an average time of 37:39
In Denmark 45 parkrunners recorded 65 (not)parkruns, with an average time of 29:35
In Italy 34 parkrunners recorded 64 (not)parkruns, with an average time of 31:16
In Sweden 38 parkrunners recorded 64 (not)parkruns, with an average time of 31:36
In Russia 31 parkrunners recorded 58 (not)parkruns, with an average time of 31:12
In the Netherlands 36 parkrunners recorded 54 (not)parkruns, with an average time of 31:20
In Norway 14 parkrunners recorded 40 (not)parkruns, with an average time of 34:15
In Malaysia 17 parkrunners recorded 33 (not)parkruns, with an average time of 43:04
In New Zealand 11 parkrunners recorded 30 (not)parkruns, with an average time of 44:39
In Japan 16 parkrunners recorded 28 (not)parkruns, with an average time of 31:15
In France 15 parkrunners recorded 26 (not)parkruns, with an average time of 31:59
In Singapore 14 parkrunners recorded 15 (not)parkruns, with an average time of 23:27
In Finland 9 parkrunners recorded 14 (not)parkruns, with an average time of 45:19

Additional stats for the With Me Now group
65 parkrunners each completed 1 (not)parkrun, for a total of 65 (not)parkruns,
33 parkrunners each completed 2 (not)parkruns, for a total of 66 (not)parkruns,
22 parkrunners each completed 3 (not)parkruns, for a total of 66 (not)parkruns,
20 parkrunners each completed 4 (not)parkruns, for a total of 80 (not)parkruns,
11 parkrunners each completed 5 (not)parkruns, for a total of 55 (not)parkruns,
9 parkrunners each completed 6 (not)parkruns, for a total of 54 (not)parkruns,
18 parkrunners each completed 7 (not)parkruns, for a total of 126 (not)parkruns,
In total, 178 parkrunners completed 512 (not)parkruns