Ancestry for Westchester County, NY - ERSys®
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Westchester County – Ancestry

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Ancestry refers to the lineage or descent of a person, family, or group, tracing back through generations to identify their origins, heritage, and familial connections. It encompasses the genetic, cultural, and historical ties that link individuals to their forebears, shaping their identity and sense of belonging. Ancestry is a multifaceted concept, intertwining biology, genealogy, history, and culture, and it plays a significant role in how people understand themselves and their place in the world.

At its core, ancestry is rooted in genetics. Each individual inherits a unique combination of DNA from their parents, who in turn inherited their DNA from their own ancestors. This genetic material carries information about physical traits, predispositions to certain health conditions, and even behavioral tendencies. Advances in genetic testing, such as DNA analysis, have made it possible for individuals to trace their biological ancestry with remarkable precision. Companies like 23andMe and AncestryDNA offer services that analyze genetic markers to provide insights into a person's ethnic composition and geographic origins, often revealing surprising connections to distant relatives or previously unknown heritage.

Beyond genetics, ancestry is deeply tied to genealogy, the study of family history and lineage. Genealogical research involves constructing family trees, documenting relationships, and uncovering historical records such as birth certificates, marriage licenses, census data, and immigration documents. This process often reveals stories of migration, resilience, and adaptation, offering a window into the lives of ancestors and the challenges they faced. For many, genealogy is a way to honor their forebears and preserve their legacy for future generations.

Cultural ancestry is another critical dimension, encompassing the traditions, languages, customs, and values passed down through generations. It connects individuals to their ethnic or national heritage, shaping their cultural identity and worldview. For example, someone with Irish ancestry might celebrate St. Patrick's Day, learn traditional Irish dance, or explore the Gaelic language, while someone with Japanese ancestry might practice tea ceremonies, study calligraphy, or observe Obon festivals. Cultural ancestry fosters a sense of continuity and belonging, linking individuals to a broader community with shared experiences and values.

Historical ancestry delves into the broader context of a family's or group's past, including significant events, social conditions, and historical movements that shaped their lives. For instance, the transatlantic slave trade, the Irish Potato Famine, or the Jewish diaspora have profoundly influenced the ancestry of millions of people, leaving lasting imprints on their descendants' identities. Understanding historical ancestry often involves grappling with complex narratives of triumph and tragedy, resilience and oppression, and the interplay of individual and collective experiences.

Ancestry also has a deeply personal and emotional dimension. For many, exploring their ancestry is a journey of self-discovery, offering insights into who they are and where they come from. It can foster a sense of pride, connection, and continuity, as well as a deeper appreciation for the struggles and achievements of those who came before. At the same time, it can raise questions about identity, belonging, and the complexities of heritage, particularly for individuals with mixed or multicultural backgrounds.

In a globalized world, ancestry serves as a bridge between the past and the present, connecting individuals to their roots while also highlighting the interconnectedness of human history. It underscores the diversity and richness of human experience, reminding us that every person's story is part of a larger tapestry woven over centuries. Whether through genetic testing, genealogical research, cultural practices, or historical exploration, ancestry offers a profound way to understand ourselves and our place in the world.

A diversification score measures the diversity of ancestries in the county. As the value appoaches 100, ancestry diversity decreases and therefore increasing the risk of a lack of cultural diversity. The ancestry diversification score for this county is:

7.16

Most common ancestry not including "Unknown" is:

Carribean (Latino)

 
Ancestry Report Part I
DescriptionTotal Population American Native American Hawaiian Caribbean (Latino) Mexican Central American South American Other Hispanic African American Sub- Saharan Caribbean (Black)

Westchester County1,013,02523,5821,108180116,35143,87428,79165,27918,60365,61026,95938,982
New York (in 000's)20,1155185262,0884794306462941,381559777
National (in 000's)343,25113,8902,21362611,32738,8796,1814,6443,68725,8937,8527,174
Nassau County1,393,16032,0871,89129180,58614,99482,34555,15022,63771,40325,03551,304
Bronx County1,440,3994,5613,115461593,46070,91336,28545,13047,733206,054101,468102,776
Bergen County985,39815,35682814999,21510,87623,78366,78514,39625,99812,01314,922
Western Connecticut Planning Region639,18816,74751713134,41113,92322,69645,4989,10226,7128,91514,745
Rockland County351,83324,0913874231,5415,50412,81114,2065,08415,6666,55713,185
Putnam County98,1534,71486187,6382,1163,4713,7461,1301,298512868
 
Per Cent to Total PopulationDiversity
Index
 

Westchester County7.162.330.110.0211.494.332.846.441.846.482.663.85
New York6.602.580.260.0310.382.382.143.211.466.862.783.86
National7.834.050.640.183.3011.331.801.351.077.542.292.09
Nassau County6.902.300.140.025.781.085.913.961.625.131.803.68
Bronx County21.060.320.220.0341.204.922.523.133.3114.317.047.14
Bergen County7.311.560.080.0210.071.102.416.781.462.641.221.51
Western Connecticut Planning Region6.982.620.080.025.382.183.557.121.424.181.392.31
Rockland County7.636.850.110.018.961.563.644.041.454.451.863.75
Putnam County9.114.800.090.027.782.163.543.821.151.320.520.88
 
Comparisons to State Norms % to Total >= 150% % to Total < 50% 

Westchester County 90.3941.9559.21110.65181.83132.85200.57125.4694.3695.7199.65
New York 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
National 157.13247.33608.0431.79475.5284.1842.1173.38109.9182.2754.13
Nassau County 89.4352.0769.6055.7345.18276.29123.21111.0174.6764.6295.37
Bronx County 12.3082.95106.64396.94206.69117.7597.52226.41208.42253.34184.78
Bergen County 60.5132.2350.3897.0046.34112.82210.9599.8138.4443.8439.22
Western Connecticut Planning Region 101.7431.0368.2951.8791.45165.98221.5597.2960.8950.1659.74
Rockland County 265.8842.1939.7886.3765.68170.21125.6798.7264.8767.0297.05
Putnam County 186.4933.6161.1074.9790.51165.30118.7978.6519.2718.7622.90
 
Comparisons to National Norms % to Total >= 150% % to Total < 50% 

Westchester County 57.5316.969.74348.0538.24157.82476.29170.9785.86116.34184.11
New York 63.6440.4316.45314.5421.03118.80237.47136.2790.99121.56184.75
National 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
Nassau County 56.9221.0511.45175.299.50328.22292.59151.2867.9478.56176.19
Bronx County 7.8233.5417.541,248.5343.47139.89231.58308.53189.64307.95341.39
Bergen County 38.5113.038.29305.119.74134.03500.94136.0234.9753.2972.45
Western Connecticut Planning Region 64.7512.5411.23163.1419.23197.18526.12132.5855.4060.97110.37
Rockland County 169.2117.066.54271.6613.81202.20298.44134.5359.0381.47179.30
Putnam County 118.6813.5910.05235.8119.03196.37282.09107.1917.5322.8042.31
 
Ancestry Report Part II
DescriptionTotal Population Canadian British Dutch French German Italian Polish Scandi­navian Scotish/ Irish Spanish Other European

Westchester County1,013,0251,81020,6901,9694,84327,89485,21913,3595,60059,2874,13049,367
New York (in 000's)20,11579645941839681,3414601361,25557809
National (in 000's)343,2511,35018,0691,8283,64224,7089,0274,6675,96920,6251,1409,563
Nassau County1,393,1601,39116,9661,5794,39653,195146,37028,2766,59195,4625,58773,020
Bronx County1,440,3992211,2961286233,62914,8581,61741510,1421,2678,974
Bergen County985,3981,14114,2984,5773,61533,41479,84826,3884,54550,9134,02347,760
Western Connecticut Planning Region639,1883,32032,6302,5135,49529,51254,75413,5238,54653,0572,84234,294
Rockland County351,8337544,4858461,1599,53818,9559,2271,32920,6581,33634,779
Putnam County98,1532453,0814285715,43714,9421,8281,20111,2753944,292
 
Per Cent to Total PopulationDiversity
Index
 

Westchester County7.160.182.040.190.482.758.411.320.555.850.414.87
New York6.600.393.210.470.914.816.672.290.676.240.284.02
National7.830.395.260.531.067.202.631.361.746.010.332.79
Nassau County6.900.101.220.110.323.8210.512.030.476.850.405.24
Bronx County21.060.020.090.010.040.251.030.110.030.700.090.62
Bergen County7.310.121.450.460.373.398.102.680.465.170.414.85
Western Connecticut Planning Region6.980.525.100.390.864.628.572.121.348.300.445.37
Rockland County7.630.211.270.240.332.715.392.620.385.870.389.89
Putnam County9.110.253.140.440.585.5415.221.861.2211.490.404.37
 
Comparisons to State Norms % to Total >= 150% % to Total < 50% 

Westchester County 45.4363.6541.7952.4157.19126.1757.6281.9193.80143.71121.23
New York 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
National 100.01164.06114.49116.32149.5139.4559.40257.6396.30117.0969.31
Nassau County 25.3937.9524.3734.5979.31157.5888.6870.10109.82141.36130.38
Bronx County 3.902.801.914.745.2315.474.904.2711.2831.0115.50
Bergen County 29.4445.2299.8640.2270.43121.54117.0068.3482.81143.91120.57
Western Connecticut Planning Region 132.06159.1084.5294.2595.90128.4892.44198.10133.03156.72133.47
Rockland County 54.4939.7351.6936.1256.3180.81114.5855.9794.10133.85245.90
Putnam County 63.4697.8393.7463.78115.05228.3381.37181.29184.10141.49108.78
 
Comparisons to National Norms % to Total >= 150% % to Total < 50% 

Westchester County 45.4238.8036.5045.0638.25319.8796.9931.7997.40122.73174.91
New York 99.9960.9587.3485.9766.88253.51168.3438.81103.8485.40144.28
National 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
Nassau County 25.3823.1321.2829.7453.04399.49149.2827.21114.04120.72188.12
Bronx County 3.901.711.674.083.5039.228.261.6611.7226.4822.36
Bergen County 29.4427.5687.2234.5847.11308.11196.9626.5385.99122.90173.96
Western Connecticut Planning Region 132.0596.9873.8281.0364.14325.72155.6176.89138.15133.85192.57
Rockland County 54.4824.2245.1531.0537.66204.85192.8921.7297.72114.31354.80
Putnam County 63.4659.6381.8854.8376.95578.84136.9870.37191.18120.84156.95
 
Ancestry Report Part III
DescriptionTotal Population Chinese Filipino Japanese Korean Vietnamese South Central Asian South East Asian Other Asian Middle Eastern Other Ancestry Unknown

Westchester County1,013,02514,5048,3485,9826,93071423,1422,0291,6926,932144,64094,625
New York (in 000's)20,115771126411413360176821592,4502,376
National (in 000's)343,2514,4613,0107931,5411,9135,4521,6431,2291,93147,32251,000
Nassau County1,393,16048,59913,6472,11515,7711,05370,7423,4386,62616,249181,077163,287
Bronx County1,440,3997,2686,0266452,2143,03635,6333,3823,9131,78488,18133,191
Bergen County985,39823,21023,8556,77762,1941,71836,6214,8933,18217,156164,33086,619
Western Connecticut Planning Region639,18810,0373,4251,5742,48376515,8992,1019664,22990,45573,371
Rockland County351,8333,1143,9231801,7402598,9881,3796873,18151,92444,318
Putnam County98,1538123158124469522989840111,71014,512
 
Per Cent to Total PopulationDiversity
Index
 

Westchester County7.161.430.820.590.680.072.280.200.170.6814.289.34
New York6.603.830.620.210.700.172.990.380.410.7912.1811.81
National7.831.300.880.230.450.561.590.480.360.5613.7914.86
Nassau County6.903.490.980.151.130.085.080.250.481.1713.0011.72
Bronx County21.060.500.420.040.150.212.470.230.270.126.122.30
Bergen County7.312.362.420.696.310.173.720.500.321.7416.688.79
Western Connecticut Planning Region6.981.570.540.250.390.122.490.330.150.6614.1511.48
Rockland County7.630.891.120.050.490.072.550.390.200.9014.7612.60
Putnam County9.110.830.320.080.250.070.530.100.100.4111.9314.79
 
Comparisons to State Norms % to Total >= 150% % to Total < 50% 

Westchester County 37.36132.04287.3997.7842.3476.5153.0940.8086.70117.2179.08
New York 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
National 33.91140.52112.4264.18334.7553.20126.8887.5071.27113.18125.79
Nassau County 91.02156.9573.88161.8145.40170.0765.42116.19147.78106.7099.23
Bronx County 13.1767.0321.7921.97126.6182.8662.2466.3715.6950.2619.51
Bergen County 61.45387.88334.71902.14104.72124.47131.6378.89220.59136.9074.42
Western Connecticut Planning Region 40.9785.85119.8455.5271.8983.3187.1336.9283.83116.1897.18
Rockland County 23.09178.6524.9070.6944.2285.56103.9047.70114.55121.16106.64
Putnam County 21.5851.4240.1635.5342.2317.8126.4724.3951.7697.94125.17
 
Comparisons to National Norms % to Total >= 150% % to Total < 50% 

Westchester County 110.1793.96255.65152.3412.65143.8341.8546.63121.66103.5762.87
New York 294.9171.1688.96155.8029.87187.9878.82114.29140.3288.3679.50
National 100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00100.00
Nassau County 268.41111.6965.72252.1013.56319.7051.56132.79207.3694.2878.88
Bronx County 38.8247.7019.3934.2337.82155.7549.0675.8522.0244.4115.51
Bergen County 181.23276.03297.741,405.5531.28233.98103.7490.16309.54120.9659.16
Western Connecticut Planning Region 120.8261.10106.6186.5121.48156.6168.6842.20117.63102.6577.26
Rockland County 68.10127.1422.15110.1313.21160.8481.8954.52160.74107.0584.78
Putnam County 63.6536.5935.7355.3612.6133.4820.8627.8872.6486.5499.51


Sources: STI: PopStats, Circa April 2025