Main country
Poland
9,869 people
90.4% of total
Surname
Olczak
10,923 worldwide · 31 countries
10,923
Total population
31
Countries
1 in every 741,555
Frequency
Rarity
Moderate
Dispersion
Regional
Top countries
1
Poland
9,869
90.4%
2
United States
555
5.1%
3
France
153
1.4%
4
England
74
0.7%
5
Canada
53
0.5%
World distribution
Loading map...