Biggest UK (not)parkrun totals:
Witney 941 (not)parkruns
Maidstone 838 (not)parkruns
Chelmsford Central 625 (not)parkruns
Herrington Country 529 (not)parkruns
Blackpool 389 (not)parkruns
Nonsuch 355 (not)parkruns
Whitstable 337 (not)parkruns
Riverside 321 (not)parkruns
Bushy Park 309 (not)parkruns
Luton Wardown 306 (not)parkruns

Highest adjusted* average (not)parkruns per parkrunner: Herrington Country with 131 parkrunners recording 529 (not)parkruns
Lowest adjusted* average (not)parkruns per parkrunner: St Helens with 12 parkrunners recording 12 (not)parkruns
(* = adjusted according a statistical formula to take account of parkruns with very low numbers)

Worldwide 16509 parkrunners recorded 30997 (not)parkruns, with an average time of 34:58
In the UK 12305 parkrunners recorded 22623 (not)parkruns, with an average time of 33:52
In South Africa 1552 parkrunners recorded 3329 (not)parkruns, with an average time of 41:41
In Ireland 1681 parkrunners recorded 3053 (not)parkruns, with an average time of 35:26
In Australia 241 parkrunners recorded 474 (not)parkruns, with an average time of 37:51
In Germany 147 parkrunners recorded 380 (not)parkruns, with an average time of 35:07
In the US 126 parkrunners recorded 245 (not)parkruns, with an average time of 35:05
In Poland 123 parkrunners recorded 238 (not)parkruns, with an average time of 33:48
In Canada 108 parkrunners recorded 221 (not)parkruns, with an average time of 37:13
In Sweden 34 parkrunners recorded 65 (not)parkruns, with an average time of 32:03
In Italy 29 parkrunners recorded 62 (not)parkruns, with an average time of 29:47
In Denmark 38 parkrunners recorded 54 (not)parkruns, with an average time of 30:24
In Russia 26 parkrunners recorded 52 (not)parkruns, with an average time of 30:51
In the Netherlands 21 parkrunners recorded 44 (not)parkruns, with an average time of 33:26
In Norway 15 parkrunners recorded 39 (not)parkruns, with an average time of 32:49
In New Zealand 17 parkrunners recorded 32 (not)parkruns, with an average time of 41:14
In Malaysia 12 parkrunners recorded 28 (not)parkruns, with an average time of 39:44
In Japan 14 parkrunners recorded 22 (not)parkruns, with an average time of 30:46
In Finland 5 parkrunners recorded 16 (not)parkruns, with an average time of 52:16
In France 11 parkrunners recorded 15 (not)parkruns, with an average time of 37:23
In Singapore 4 parkrunners recorded 5 (not)parkruns, with an average time of 30:12

Additional stats for the With Me Now group
51 parkrunners each completed 1 (not)parkrun, for a total of 51 (not)parkruns,
40 parkrunners each completed 2 (not)parkruns, for a total of 80 (not)parkruns,
26 parkrunners each completed 3 (not)parkruns, for a total of 78 (not)parkruns,
18 parkrunners each completed 4 (not)parkruns, for a total of 72 (not)parkruns,
9 parkrunners each completed 5 (not)parkruns, for a total of 45 (not)parkruns,
10 parkrunners each completed 6 (not)parkruns, for a total of 60 (not)parkruns,
16 parkrunners each completed 7 (not)parkruns, for a total of 112 (not)parkruns,
In total, 170 parkrunners completed 498 (not)parkruns